Repurchase of common stock authorized, maximum
Stock Repurchase Program, Authorized Amount
Hedging Designation [Domain]
Hedging Designation [Domain]
Supplemental disclosure of cash flow information:
Supplemental Cash Flow Information [Abstract]
Summary of Company's Purchased Shares of its Common Stock, Including Commissions
Class of Treasury Stock [Table Text Block]
Number, vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Trade names and trademarks
Trade names and trademarks (Finite lived)
Trademarks and Trade Names [Member]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Leasehold improvements
Leasehold Improvements [Member]
Net income attributable to ExlService Holdings, Inc. stockholders
Net income
Net Income (Loss) Attributable to Parent
Entity Emerging Growth Company
Entity Emerging Growth Company
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Interest cost
Defined Benefit Plan, Interest Cost
Accrued employee costs
Employee-related Liabilities, Current
Accrued withholding taxes
Deferred Tax Assets, Withholding Taxes
Deferred Tax Assets, Withholding Taxes
Income Statement Location [Axis]
Income Statement Location [Axis]
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Schedule of Maturities of Long-term Debt
Schedule of Maturities of Long-term Debt [Table Text Block]
Consideration received for process transition activities
Contract From Customer Liability,, Consideration Received From Transitions Activities
Contract From Customer Liability, Consideration Received From Transitions Activities
Export-oriented units established, percentage
Export Oriented Units Established Percentage
Export oriented units established percentage.
Foreign currency translation gain/(loss)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Debt instrument, conversion price (in dollars per share)
Debt Instrument, Convertible, Conversion Price
Proceeds from sale of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Weighted-average fair value, forfeited (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Contracts with Customer, Receivables, Liabilities and Revenue Recognized
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Additional paid-in capital
Additional Paid in Capital, Common Stock
Entity Filer Category
Entity Filer Category
Number of options, forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Operating lease
Operating Lease, Weighted Average Remaining Lease Term
Other assets
Other Assets, Noncurrent
Rest of World
Rest of World
Rest Of World [Member]
Rest of World.
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Segments [Axis]
Segments [Axis]
Number available for grant (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Net (decrease)/increase in cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-Lived Intangible Assets [Line Items]
Stock-based compensation
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Advance income tax, net
Increase (Decrease) in Income Taxes Payable
Aggregate intrinsic value, exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Derivative financial instruments
Foreign Currency Contracts, Liability, Fair Value Disclosure
2021 (October - December)
Long-Term Debt, Maturity, Remainder of Fiscal Year
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Document Fiscal Year Focus
Document Fiscal Year Focus
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amortization expense
Amortization of Intangible Assets
Other current assets
Other Current Assets [Member]
Dilutive effect of conversion premium on the Notes (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities
Operating lease
Operating Lease, Weighted Average Discount Rate, Percent
Weighted average potentially dilutive considered anti-dilutive and not included in computing diluted earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Expected return on plan assets, percentage
Defined Benefit Plan Expected Return On Plan Assets Percentage
Defined Benefit Plan Expected Return On Plan Assets Percentage
Deferred revenue (consideration received in advance)
Contract with Customer, Liability, Revenue Recognized
Tax benefit on settlement of notes
Effective Income Tax Rate Reconciliation, Deduction, Settlement Of Convertible Debt
Effective Income Tax Rate Reconciliation, Deduction, Settlement Of Convertible Debt
Buildings
Building [Member]
Advance income tax, net
Prepaid Taxes
Schedule of Purchase of Common Stock from Employees Withholding Tax Payments Related to Vesting of Restricted Stock
Schedule Of Purchase Of Common Stock From Employees Withholding Tax Payments [Table Text Block]
Schedule of Purchase of Common Stock from Employees Withholding Tax Payments
Weighted-average fair value, granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Actual return
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenue from External Customer [Line Items]
Derivatives in Cash Flow Hedging Relationships
Derivatives in cash flow hedging relationships
Cash Flow Hedging [Member]
Retirement benefits
Liability, Defined Benefit Plan, Noncurrent
Schedule of Indefinite Lived Intangible Assets
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]
Award Type [Domain]
Award Type [Domain]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
Credit Facility [Domain]
Credit Facility [Domain]
Assets
Assets [Abstract]
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Amortization of actuarial loss, gross of tax
Defined Benefit Plan, Amortization of Gain (Loss)
Land
Land [Member]
Right-of-use assets obtained in exchange for new finance lease liabilities
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Derivatives and Hedge Accounting
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Number, granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Preferred stock, $0.001 par value; 15,000,000 shares authorized, none issued
Preferred Stock, Value, Issued
Number of options, outstanding, beginning balance (in shares)
Number of options, outstanding, ending Balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Entity Address, City or Town
Entity Address, City or Town
Convertible debt, threshold consecutive trading days
Debt Instrument, Convertible, Threshold Consecutive Trading Days
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Retained Earnings
Retained Earnings [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Liabilities, Noncurrent [Abstract]
Liabilities, Noncurrent [Abstract]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Weighted-average remaining lease term (in years)
Weighted-Average Remaining Lease Term [Abstract]
Weighted-Average Remaining Lease Term [Abstract]
Long-lived Assets Based on Geographical Information
Long-lived Assets by Geographic Areas [Table Text Block]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Reclassification adjustments
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Shares repurchased (in shares)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Depreciation and Amortization
Depreciation And Amortization [Member]
Depreciation And Amortization [Member]
Number of classes of common stock outstanding
Number Of Classes Of Common Stock Outstanding
Number Of Classes Of Common Stock Outstanding
Summary of Other Non-Current Liabilities
Other Noncurrent Liabilities [Table Text Block]
Principal payments of finance lease liabilities
Financing cash outflows for finance leases
Finance Lease, Principal Payments
Entity Interactive Data Current
Entity Interactive Data Current
Interest expense on the Notes
Interest Expense, Related Party
Number of operating segments
Number of Operating Segments
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Basic (in dollars per share)
Earnings Per Share, Basic
Other Assets
Other Assets Disclosure [Text Block]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
2024
2023
Lessee, Operating Lease, Liability, to be Paid, Year Three
Finance Lease
Finance Lease [Abstract]
Finance Lease [Abstract]
2019 Repurchase Program
Two Thousand Nineteen Repurchase Program [Member]
Two Thousand Nineteen Repurchase Program [Member]
Revenues, net
Revenue from Contract with Customer [Text Block]
Number, outstanding, at beginning balance (in shares)
Number, outstanding, at ending balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Document Type
Document Type
2022
Long-Term Debt, Maturity, Year One
Unamortized debt issuance cost
Unamortized Debt Issuance Expense
Interest expense on the Notes
Interest Expense, Debt
Additions / (reductions) during the period
Accounts Receivable, Credit Loss Expense (Reversal) And Other Writeoffs
Accounts Receivable, Credit Loss Expense (Reversal) And Other Writeoffs
Contribution to the defined benefit plans
Defined Contribution Plan, Cost
Entity Current Reporting Status
Entity Current Reporting Status
Interest and dividend income
Investment Income, Interest and Dividend
Operating cash outflows for operating leases
Operating Lease, Payments
Others, net
Other Noncash Income (Expense)
Foreign currency exchange contracts, asset
Derivative Asset, Fair Value, Gross Asset
Unrealized gain/(loss) on cash flow hedges
Unrealized gain/(loss) recognized in AOCL
Effect of net investment hedges on accumulated other comprehensive loss
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
Allowance / (reversal) for expected credit losses
Accounts Receivable, Credit Loss Expense (Reversal)
Total
Long-term Debt, Gross
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Summary of Other Income, Net
Interest and Other Income [Table Text Block]
Plan Name [Axis]
Plan Name [Axis]
Assets
Assets, Fair Value Disclosure [Abstract]
Total borrowings
Debt outstanding
Long-term Debt
Property and equipment, net
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
Contract Acquisition Costs
Contract Acquisition Costs [Member]
Contract Acquisition Costs [Member]
Derivative instruments
Derivative Instruments and Hedges, Liabilities
Total
Assets, Fair Value Disclosure
Level 1
Fair Value, Inputs, Level 1 [Member]
Unrealized foreign exchange gain, net
Foreign Currency Transaction Gain (Loss), Unrealized
BPM and related services
BPM and Related Services [Member]
BPM and Related Services [Member]
Document Transition Report
Document Transition Report
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Operating Leases
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Long-term borrowings
Long-term Debt, Gross, Excluding Current Maturities
Long-term Debt, Gross, Excluding Current Maturities
Finite-lived intangible assets:
Finite-Lived Intangible Assets [Line Items]
Total liabilities and stockholders’ equity
Liabilities and Equity
Other Income and Expenses [Abstract]
Other Income and Expenses [Abstract]
Deferred revenue
Contract with Customer, Liability, Current
Excess tax benefits, stock awards
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount
2025
Lessee, Operating Lease, Liability, to be Paid, Year Five
Weighted-average exercise price, exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Benefits paid
Defined Benefit Plan, Plan Assets, Benefits Paid
Acquisition of treasury stock
Acquisition Of Treasury Stock Value
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is held in treasury.
Liabilities and stockholders’ equity
Liabilities and Equity [Abstract]
Accounts payable
Increase (Decrease) in Accounts Payable
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Derivative financial instruments
Foreign Currency Contract, Asset, Fair Value Disclosure
Schedule of Other Current Assets
Schedule of Other Current Assets [Table Text Block]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Income tax effects relating to above
Income tax effects
Total income tax benefit / (expense) recognized in other comprehensive income / (loss)
Reclassification from AOCI, Current Period, Tax
Earnings Per Share
Earnings Per Share [Text Block]
Operating expenses:
Operating Expenses [Abstract]
Weighted average purchase price per share (in dollars per share)
Treasury Stock Acquired, Average Cost Per Share
Summary of Effect of Net Investment Hedges on Accumulated Other Comprehensive Loss
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Other Non-Current Liabilities
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block]
2025
Finite-Lived Intangible Asset, Expected Amortization, Year Four
Capitalized Contract Cost [Table]
Capitalized Contract Cost [Table]
Stock issued against stock-based compensation plans
Stock Issued During Period, Value, Stock Options Exercised
Minimum
Minimum [Member]
Organization
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Unrecognized tax benefits
Liability for Uncertainty in Income Taxes, Noncurrent
Gross profit
Gross Profit
2023
2022
Lessee, Operating Lease, Liability, to be Paid, Year Two
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Conversion rate
Debt Instrument, Convertible, Conversion Ratio
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Total
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Operating Lease
Operating Leases [Abstract]
Operating Leases [Abstract]
Income before income tax expense and earnings from equity affiliates
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Unamortized debt issuance costs
Debt Issuance Costs, Net
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets [Axis]
Preferred stock, authorized (in shares)
Preferred Stock, Shares Authorized
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents Disclosure [Text Block]
Others, net
Other Miscellaneous Nonoperating Income (Expense)
Other Miscellaneous Nonoperating Income (Expense)
Derivative instruments
Derivative Asset, Current
Leases
Lessee, Finance Leases [Text Block]
Gains / (losses) recognized during the period
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Trading Symbol
Trading Symbol
Deferred tax assets, net
Deferred Income Tax Assets, Net
United Kingdom
UNITED KINGDOM
Current liabilities:
Liabilities, Current [Abstract]
Operating lease liabilities
Increase (Decrease) in Operating Lease Liability
General and administrative expenses
General and administrative expenses
General and Administrative Expense
Borrowings
Debt Disclosure [Text Block]
Foreign currency translation loss
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Stock-Based Compensation
Share-based Payment Arrangement [Text Block]
Level 3
Fair Value, Inputs, Level 3 [Member]
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost [Domain]
Capitalized Contract Cost [Domain]
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Accrued employee costs
Increase (Decrease) in Other Employee-Related Liabilities
Weighted-average remaining contractual life
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Issuance of treasury stock (in shares)
Stock Issued During Period, Shares, New Issues
Total operating lease liabilities
Present value of lease liabilities
Operating Lease, Liability
Letters of credit outstanding
Letters of Credit Outstanding, Amount
Schedule of Performance Based Stock Awards Activity
Share-based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block]
Foreign exchange gain, net
Gain/(loss) recognized in consolidated statements of income
Foreign exchange gain/(loss), net
Foreign Currency Transaction Gain (Loss), before Tax
Common stock, $0.001 par value; 100,000,000 shares authorized, 39,312,225 shares issued and 33,343,895 shares outstanding as of September 30, 2021 and 38,968,052 shares issued and 33,559,434 shares outstanding as of December 31, 2020
Common Stock, Value, Issued
Finance lease
Finance Lease, Weighted Average Discount Rate, Percent
Loss on settlement of convertible notes, foreign exchange gain, interest expense and other income, net
Nonoperating Income (Expense)
Emerging Business
Emerging Business [Member]
Emerging Business [Member]
Purchase Commitment
Long-term Purchase Commitment, Amount
Schedule of Finite Lived Intangible Assets Useful Lives
Schedule Of Finite Lived Intangible Assets Useful Lives Table [Table Text Block]
Schedule of finite lived intangible assets useful lives.
Cost not yet recognized, period for recognition
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Weighted-average fair value, outstanding, at beginning balance (in dollars per share)
Weighted-average fair value, outstanding, at ending balance (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Basis of Preparation
Basis of Accounting, Policy [Policy Text Block]
Commitments and contingencies (Refer to Note 24)
Commitments and Contingencies
Deferred contract fulfillment costs
Deferred Contract Acquisition Costs NonCurrent
Deferred Contract Acquisition Costs NonCurrent
Leases
Lessee, Operating Leases [Text Block]
Analytics services
Analytics Services [Member]
Analytics Services [Member]
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Aggregate consideration, debt component
Related Party Transaction, Amounts Of Transaction, Debt
Related Party Transaction, Amounts Of Transaction, Debt
Amortization of right-of-use assets
Finance Lease, Right-of-Use Asset, Amortization
Class of Treasury Stock [Table]
Class of Treasury Stock [Table]
Deposits with statutory authorities
Deposit Assets
Income taxes payable
Accrued Income Taxes, Noncurrent
2021 (October 1 - December 31)
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year
Percentage of target shares earned
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Target Shares Earned
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Target Shares Earned
Restricted Stock
Restricted Stock [Member]
Contract assets
Contract with Customer, Asset, before Allowance for Credit Loss
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Insurance
Insurance [Member]
Insurance [Member]
Document Period End Date
Document Period End Date
Deferred contract fulfillment costs
Deferred Contract Acquisition Costs Current
Deferred Contract Acquisition Costs Current
Dilutive effect of share-based awards (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Goodwill [Line Items]
Goodwill [Line Items]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues Based on Geographical Information
Revenue from External Customers by Geographic Areas [Table Text Block]
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]
Entity Registrant Name
Entity Registrant Name
Treasury stock (in shares)
Treasury Stock, Shares
Amendment And Restatement Of The 2006 Omnibus Award Plan (2015 Plan)
Amendment And Restatement Of The 2006 Omnibus Award Plan (2015 Plan) [Member]
Amendment And Restatement Of The 2006 Omnibus Award Plan (2015 Plan)
Less: Imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Network equipment and computers
Technology Equipment [Member]
2026 and thereafter
2026 and thereafter
Finance Lease, Liability, to be Paid, after Year Five
Accrued expenses and other current liabilities
Accrued expenses and other current liabilities
Accrued Liabilities, Current
Revenues, net
Revenue from Contract with Customer, Excluding Assessed Tax
Less: Imputed interest
Finance Lease, Liability, Undiscounted Excess Amount
Employee Stock Option
Share-based Payment Arrangement, Option [Member]
Equity [Abstract]
Equity [Abstract]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Interest accrued on term deposits
Interest Receivable, Current
2025
Finance Lease, Liability, to be Paid, Year Five
Notes
Convertible Notes Payable [Member]
Common Stock
Common Stock [Member]
Loss on net investment hedges
Losses on net investment hedges
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax
Finance lease
Finance Lease, Weighted Average Remaining Lease Term
Segment and Geographical Information
Segment Reporting Disclosure [Text Block]
Income from operations
Operating Income (Loss)
Contribution to the 401(k) Plans
Defined Contribution Plan, Employer Discretionary Contribution Amount
Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Current portion of operating lease liabilities
Operating lease liabilities - Current
Operating Lease, Liability, Current
Summary of Significant Accounting Policies
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
2023
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Hedging Designation [Axis]
Hedging Designation [Axis]
Issuance of treasury stock
Issuance of shares of the Company's common stock
Stock Issued During Period, Value, Treasury Stock Reissued
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Abstract]
Stock-based compensation expense
Share-based Payment Arrangement, Noncash Expense
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Cash and cash equivalents
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Accrued capital expenditures
Capital Expenditure, Liability, Current
Capital Expenditure, Liability, Current
Depreciation and amortization expense
Depreciation
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Repayments of borrowings
Repayments of debt
Repayments of Debt
Accrued capital expenditures
Capital Expenditure, Liability, Noncurrent
Capital Expenditure, Liability, Noncurrent
Aggregate consideration
Related Party Transaction, Amounts of Transaction
Settlement of portion of convertible notes through issuance of treasury stock
Notes Reduction
Cash and Cash Equivalents [Abstract]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Treasury Stock
Treasury Stock [Member]
Interest accrued
Interest Payable
Contract assets
Contract with Customer, Asset, before Allowance for Credit Loss, Current
Tax expense as a result of electing new tax regime for two Indian subsidiaries
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount
Other assets
Other Assets [Member]
Other income, net
Other income, net
Other Nonoperating Income (Expense)
Reduction in lease liabilities
Increase (Decrease) In Operating Lease Liabilities
Increase (Decrease) In Operating Lease Liabilities
Effect of exchange rate changes
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)
Purchases of property and equipment
Payments to Acquire Property, Plant, and Equipment
Other current liabilities
Other Liabilities, Current
Employer contribution
Defined Benefit Plan, Plan Assets, Contributions by Employer
Maximum
Maximum [Member]
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement [Abstract]
Total liabilities
Liabilities
Schedule of Company's Contribution Plan
Defined Contribution Plan Disclosures [Table Text Block]
Schedule of Accrued Expenses and Other Current Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Award Type [Axis]
Award Type [Axis]
2022
Finite-Lived Intangible Asset, Expected Amortization, Year One
Weighted-average exercise price, granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Aggregate intrinsic value, outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Weighted-average exercise price, vested and exercisable at end of period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price
Schedule of Maturities of Operating Lease Liabilities
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Stockholders’ equity
Stockholders' Equity Attributable to Parent
Common stock, issued (in shares)
Common Stock, Shares, Issued
Change in Plan Assets
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
Advances to suppliers
Prepaid Supplies
Preferred stock, issued (in shares)
Preferred Stock, Shares Issued
Aggregate amount demanded by income tax authorities related to its transfer pricing issues
Aggregate Disputed Amount Related to Transfer Pricing and Permanent Establishment
Aggregate disputed amount related to transfer pricing and permanent establishment
Designated as Hedging Instrument
Derivatives Designated as Hedging Instruments
Designated as Hedging Instrument [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Market Condition Based PRSUs
Market Condition Based Performance Restricted Stock Units [Member]
Market Condition Based Performance Restricted Stock Units [Member]
Loss on settlement of convertible notes
Loss on settlement of convertible notes
Loss on early extinguishment and conversion of debt
Gain (Loss) on Extinguishment of Debt
Accounts receivable, including unbilled receivables
Accounts Receivable, before Allowance for Credit Loss
Acquisition of treasury stock
Payments for Repurchase of Common Stock
Estimated useful lives
Property, Plant and Equipment, Useful Life
India
INDIA
Schedule of Accumulated Other Comprehensive Loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Supplemental disclosure of non-cash investing and financing activities:
Noncash Investing and Financing Items [Abstract]
Equity, Class of Treasury Stock [Line Items]
Equity, Class of Treasury Stock [Line Items]
Aggregate consideration, equity component
Related Party Transaction , Amounts Of Transaction, Equity
Related Party Transaction , Amounts Of Transaction, Equity
Software
Software and Software Development Costs [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Operating lease liabilities, less current portion
Operating lease liabilities - Non-current
Operating Lease, Liability, Noncurrent
Total lease payments
Finance Lease, Liability, Payment, Due
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Debt instrument face amount
Debt Instrument, Face Amount
Consideration received for process transition activities
Contract From Customer Liability, Consideration Received From Transitions Activities, Revenue Recognized
Contract From Customer Liability, Consideration Received From Transitions Activities, Revenue Recognized
Interest expense
Interest Expense
2022
2021
Finance Lease, Liability, to be Paid, Year One
Net gratuity cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Effective Interest Rate
Debt Instrument, Interest Rate, Effective Percentage
Philippines
PHILIPPINES
Amortization
Capitalized Contract Cost, Amortization
City Area Code
City Area Code
Weighted-average discount rate
Weighted-Average Discount Rate [Abstract]
Weighted-Average Discount Rate [Abstract]
Retained earnings
Retained Earnings (Accumulated Deficit)
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Total finance lease liabilities
Present value of lease liabilities
Finance Lease, Liability
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Gain on sale and mark-to-market of mutual funds
Gain (Loss) on Investments
Impairment loss in relation to costs capitalized
Capitalized Contract Cost, Impairment Loss
Summary of Effect of Foreign Currency Exchange Contracts on Consolidated Statements of Income
Derivative Instruments, Gain (Loss) [Table Text Block]
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Restrictions on Cash and Cash Equivalents
Restrictions on Cash and Cash Equivalents [Table Text Block]
Income Statement [Abstract]
Income Statement [Abstract]
Investment in equity affiliate
Equity Method Investments
Amendment Flag
Amendment Flag
Summary of Fair Value of Foreign Currency Exchange Contracts
Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block]
Receivables from statutory authorities
Service Taxes Receivable, Current
Service Taxes Receivable, Current
2024
2023
Finance Lease, Liability, to be Paid, Year Three
2025
2024
Finance Lease, Liability, to be Paid, Year Four
Trade names and trademarks
Indefinite-lived Intangible Assets (Excluding Goodwill)
Internally developed software, net
Capitalized Computer Software, Net
Proceeds from exercise of stock options
Proceeds from Stock Options Exercised
Short-term investments
Short-term Investments
2023
2022
Finance Lease, Liability, to be Paid, Year Two
Weighted-average exercise price, forfeited (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Income tax expense
Income tax (expense)/benefit relating to above
Income Tax Expense (Benefit)
Total equity
Beginning balance
Ending balance
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Accounts receivable, net
Accounts receivable, net
Accounts receivable, net
Accounts Receivable, after Allowance for Credit Loss, Current
Proceeds from borrowings
Proceeds from Issuance of Long-term Debt
Amortization of operating lease right-of-use assets
Amortization Of Operating Lease Right Of Use Asset
Amortization Of Operating Lease Right Of Use Asset
Equity Components [Axis]
Equity Components [Axis]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Change in Plan Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Total current assets
Assets, Current
Selling and marketing expenses
Selling and Marketing Expense [Member]
Total lease payments
Lessee, Operating Lease, Liability, to be Paid
Number, forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Derivative instruments
Derivative Instruments and Hedges, Liabilities, Noncurrent
Increase (Decrease) In Capitalized Contract Costs [Roll Forward]
Increase (Decrease) In Capitalized Contract Costs [Roll Forward]
Increase (Decrease) In Capitalized Contract Costs [Roll Forward]
Revenues and Cost of Revenues for Company's Reportable Segments
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Contract Fulfillment Costs
Contract Fulfillment Costs [Member]
Contract Fulfillment Costs [Member]
Entity File Number
Entity File Number
Total consideration
Stock Repurchased During Period, Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
2026 and thereafter
2026 and thereafter
Lessee, Operating Lease, Liability, to be Paid, after Year Five
Lease deposits
Security Deposit
Foreign currency translation gain/(loss)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax
Schedule of Related Party Transactions
Schedule of Related Party Transactions [Table Text Block]
Current portion of long-term borrowings
Long-term Debt, Current Maturities
Product and Service [Axis]
Product and Service [Axis]
Property, Plant and Equipment, Type [Domain]
Long-Lived Tangible Asset [Domain]
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Schedule of Cash and Cash Equivalents
Schedule of Cash and Cash Equivalents [Table Text Block]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Entity Small Business
Entity Small Business
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Unrecognized compensation cost
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount
Equity Component [Domain]
Equity Component [Domain]
Units vested for which the underlying common stock is yet to be issued (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number
Selling and marketing expenses
Selling and marketing expenses
Selling and Marketing Expense
2022
2021
Lessee, Operating Lease, Liability, to be Paid, Year One
Effect of tax rate changes on retirement benefits
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax
Schedule of Interest Expense Debt Recognized
Schedule Of Interest Expense Debt [Table Text Block]
Schedule of Interest Expense, Debt
Debt instrument, day volume
Debt Instrument, Convertible, Day Volume For Weighted Average Price
Debt Instrument, Convertible, Day Volume For Weighted Average Price
Amortization of non-cash interest expense related to convertible notes
Amortization of debt discount on the Notes
Amortization of Debt Discount (Premium)
Motor vehicles
Vehicles [Member]
Statement [Line Items]
Statement [Line Items]
Property and equipment, net
Property and equipment, net
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Deferred revenue
Increase (Decrease) in Contract with Customer, Liability
Restricted cash
Restricted cash (non-current)
Restricted Cash, Noncurrent
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Purchase of investments
Payments to Acquire Investments
Proceeds from redemption of investments
Proceeds from Sale, Maturity and Collection of Investments
Fair value of convertible notes
Convertible Debt, Fair Value Disclosures
2025
2024
Lessee, Operating Lease, Liability, to be Paid, Year Four
Total intangible assets, gross carrying amount
Intangible Assets, Gross (Excluding Goodwill)
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Fair Value Measurements
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]
Entity Address, State or Province
Entity Address, State or Province
Finance lease liabilities
Finance lease liabilities - Current
Finance Lease, Liability, Current
Level 2
Fair Value, Inputs, Level 2 [Member]
Geographic Distribution [Domain]
Geographic Distribution [Domain]
Accrued expenses and other current liabilities
Accrued Expenses And Other Current Liabilities [Member]
Accrued expenses and other current liabilities.
Property, Plant and Equipment, Type [Axis]
Long-Lived Tangible Asset [Axis]
Deferred transition revenue
Contract with Customer, Liability, Noncurrent
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Bank guarantees and deposits in respect to contingencies
Total Bank Guarantees And Deposits In Respect Of Contingencies
Total Bank Guarantees and Deposits in Respect of Contingencies
Revenue from External Customers by Products and Services [Table]
Revenue from External Customers by Products and Services [Table]
Interest on lease liabilities
Finance Lease, Interest Expense
Employee Benefit Plans
Retirement Benefits [Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Number of options, granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Entity Shell Company
Entity Shell Company
Convertible debt, threshold trading days
Debt Instrument, Convertible, Threshold Trading Days
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Local Phone Number
Local Phone Number
Total other comprehensive income/(loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Schedule of Costs Related to Company's Stock-based Compensation Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Finance Leases
Finance Lease, Liability, Payment, Due [Abstract]
Cash flow hedge gain (loss) to be reclassified within twelve months
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months
Total assets
Assets
Plan Name [Domain]
Plan Name [Domain]
Common stock, authorized (in shares)
Common Stock, Shares Authorized
3.50% Convertible Senior Notes due October 1, 2024
3.50% Convertible Senior Notes due October 1, 2024 [Member]
3.50% Convertible Senior Notes due October 1, 2024 [Member]
Interest
Interest Paid, Excluding Capitalized Interest, Operating Activities
Numerators:
Net Income (Loss) Attributable to Parent [Abstract]
Geographical [Domain]
Geographical [Domain]
Accrued Expenses and Other Current Liabilities
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
Product and Service [Domain]
Product and Service [Domain]
Contract assets
Contract with Customer, Asset, before Allowance for Credit Loss, Noncurrent
Depreciation and amortization expense
Depreciation and amortization expense
Depreciation, Depletion and Amortization, Nonproduction
Interest rate
Debt Instrument, Interest Rate, Stated Percentage
Derivative Contract [Domain]
Derivative Contract [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Credit Facilities Carried an Effective Interest Rate
Schedule of Line of Credit Facilities [Table Text Block]
Revolving Credit Facility
Revolving Credit Facility
Revolving Credit Facility [Member]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Office furniture and equipment
Furniture and Fixtures [Member]
Schedule of Components of Lease Cost
Lease, Cost [Table Text Block]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Entity Tax Identification Number
Entity Tax Identification Number
Others
Other Assets, Miscellaneous, Current
Capitalized Contract Cost [Axis]
Capitalized Contract Cost [Axis]
Geographical [Axis]
Geographical [Axis]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Mutual funds
Money Market And Mutual Fund Fair Value Disclosure
Money market and mutual fund fair value disclosure.
Basic (in shares)
Basic weighted average common shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Segments [Domain]
Segments [Domain]
Deposits for bank guarantees issued
Bank Guarantee Issued
Bank Guarantee Issued
Threshold percentage of stock price trigger
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Service cost
Defined Benefit Plan, Service Cost
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Restricted Stock Units
Restricted Stock and Restricted Stock Units [Member]
Restricted Stock and Restricted Stock Units [Member]
Income taxes, net of refunds
Income Taxes Paid, Net
Opening Balance
Closing Balance
Capitalized Contract Cost, Gross
Total Non-United States
Non-US [Member]
Amounts paid on deposits
Amounts Paid As Deposits In Respect Of Contingencies
Amounts paid as deposits in respect of Contingencies.
Finance lease:
Lease, Cost [Abstract]
Schedule of Amortization of Intangible Assets
Finite-lived Intangible Assets Amortization Expense [Table Text Block]
Accounts receivable not billed
Unbilled Contracts Receivable
Total comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Intangible assets, net
Total intangible assets, net carrying amount
Intangible Assets, Net (Excluding Goodwill)
Deferred revenue (consideration received in advance)
Contract with Customer, Liability
Unrealized (gain) / loss on short term investments
Unrealized Gain (Loss) on Investments
Net cash used for financing activities
Net Cash Provided by (Used in) Financing Activities
Cash paid during the period for:
Interest Paid, Including Capitalized Interest, Operating and Investing Activities [Abstract]
Other comprehensive income/(loss):
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Less: 5,968,330 shares as of September 30, 2021 and 5,408,618 shares as of December 31, 2020, held in treasury, at cost
Treasury Stock, Value
Weighted-average number of shares used in computing earnings per share attributable to ExlService Holdings Inc. stockholders:
Denominators:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Deferred tax liabilities, net
Deferred Income Tax Liabilities, Net
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Other non-current liabilities
Other Noncurrent Liabilities [Member]
Others
Other Assets, Miscellaneous
Gain / (loss) from equity-method investment
Loss from equity-method investment
Income (Loss) from Equity Method Investments
Common stock issued (in shares)
Stock Issued During Period, Shares, Conversion of Convertible Securities
Schedule of Restricted Stock Unit Activity
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Schedule of Maturities of Finance Lease Liabilities
Finance Lease, Liability, Fiscal Year Maturity [Table Text Block]
Accounts payable
Accounts Payable, Current
Total including shares held in treasury
Stockholders Equity Including Shares Held In Treasury
Total stockholders' equity including shares held in treasury.
Long-lived assets impairment charges
Impairment, Long-Lived Asset, Held-for-Use
Depreciation and amortization expense
Depreciation, Depletion and Amortization
Weighted average purchase price per share (in dollars per share)
Accelerated Share Repurchases, Final Price Paid Per Share
Assets and Liabilities Measured at Fair Value
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
2024
Finite-Lived Intangible Asset, Expected Amortization, Year Three
Other Income, net
Interest and Other Income [Text Block]
Less : Accumulated amortization
Capitalized Computer Software, Accumulated Amortization
Schedule of Supplemental Cash Flow Information Related to Leases
Schedule Of Supplemental Cash Flow And Other Information, Leases [Table Text Block]
Schedule of Statement of Cash Flows, Supplemental Disclosures [Table Text Block]
Accumulated Other Comprehensive Loss
Total
AOCI Attributable to Parent [Member]
2021 (October 1 - December 31)
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year
Other assets
Other Assets
Common stock, outstanding (in shares)
Beginning balance (in shares)
Ending balance (in shares)
Common Stock, Shares, Outstanding
Reduction in lease assets
Increase (Decrease) In Operating Lease Assets
Increase (Decrease) In Operating Lease Assets
Accrued expenses
Accrued Expenses Current
Accrued expenses.
Cost of revenues
Cost of Goods and Services Sold
Others
Other Sundry Liabilities, Noncurrent
Additions / (reductions)
Increase (Decrease) In Capitalized Contract Cost Gross
Increase (Decrease) In Capitalized Contract Cost Gross
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
New Credit Agreement
New Credit Agreement [Member]
New Credit Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Schedule of Supplemental Balance Sheet Information
Schedule Of Leases In Statement Of Financial Position [Table Text Block]
Schedule Of Leases In Statement Of Financial Position [Table Text Block]
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Total lease cost
Lease, Cost
Schedule of Property and Equipment
Property, Plant and Equipment [Table Text Block]
Income Statement Location [Domain]
Income Statement Location [Domain]
ExlService Holdings, Inc. Stockholders’ equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Income before earnings from equity affiliates
Income (Loss) From Continuing Operations Before Equity Method Investments, Total
Income (Loss) From Continuing Operations Before Equity Method Investments, Total
Customer relationships
Customer relationships
Customer Relationships [Member]
Owned assets, net
Property, Plant and Equipment, Net
Property and Equipment, net
Property, Plant and Equipment Disclosure [Text Block]
Total operating expenses
Operating expenses
Operating Expenses
Prepaid expenses
Other Prepaid Expense, Current
Other non-current liabilities
Other non-current liabilities
Other Liabilities, Noncurrent
Translation adjustment
Accounts Receivable, Allowance for Credit Loss, Foreign Currency Translation
Accounts Receivable, Allowance for Credit Loss, Foreign Currency Translation
Cost
Capitalized Computer Software, Gross
Schedule of Company's Debt Position
Schedule of Long-term Debt Instruments [Table Text Block]
Schedule of Estimated Future Amortization of Intangible Assets
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Acquisition of treasury stock (in shares)
Shares repurchased (in shares)
Treasury Stock, Shares, Acquired
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Earnings per share attributable to ExlService Holdings, Inc. stockholders:
Earnings Per Share [Abstract]
Derivative instruments
Derivative Asset
Owned assets, gross
Property, Plant and Equipment, Gross
Less: Allowance for expected credit loss
Balance at the beginning of the period
Balance at the end of the period
Accounts Receivable, Allowance for Credit Loss
Income tax benefit on amortization of actuarial loss
Reclassification adjustment for retirement benefits
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax
Document Quarterly Report
Document Quarterly Report
Other assets
Increase (Decrease) in Other Operating Assets
Reclassification to net income
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Number of options, vested and exercisable at end of period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Foreign currency exchange contracts
Foreign Exchange Contract [Member]
Retirement benefits
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Weighted-average exercise price, outstanding, beginning balance (in dollars per share)
Weighted-average exercise price, outstanding, ending balance (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Unrealized loss on cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax
Long-term borrowings, less current portion
Long-term borrowings
Long-term Debt, Excluding Current Maturities
Liabilities
Liabilities, Fair Value Disclosure [Abstract]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Stock-based compensation expenses
Share-based Payment Arrangement, Expense
Client liabilities
Broker-Dealer, Payable to Customer
Foreign income
Income (Loss) from Continuing Operations After Income Taxes, Foreign
Income (Loss) from Continuing Operations After Income Taxes, Foreign
Less: Accumulated depreciation and amortization
Accumulated depreciation
Finance Lease, Right-of-Use Asset, Accumulated Amortization
Earnings per share attributable to ExlService Holdings Inc. stockholders:
Earnings Per Share, Basic and Diluted [Abstract]
Accrued expenses and other liabilities
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Plan assets at January 1, 2021
Plan assets at September 30, 2021
Defined Benefit Plan, Plan Assets, Amount
Document Fiscal Period Focus
Document Fiscal Period Focus
Effective tax rate, current income tax expense (benefit) (as a percent)
Effective Income Tax Rate Reconciliation, Percent
Effect of foreign exchange gain/(loss)
Gain (Loss) on Hedging Activity
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Restricted cash
Restricted cash (current)
Restricted Cash, Current
Aggregate intrinsic value, vested and exercisable at end of period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value
Payables and Accruals [Abstract]
Payables and Accruals [Abstract]
Capital work in progress
Construction in Progress [Member]
Cash, cash equivalents and restricted cash at the beginning of the period
Cash, cash equivalents and restricted cash at the end of the period
Cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
United States
United States
UNITED STATES
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Current assets:
Assets, Current [Abstract]
Healthcare
Healthcare [Member]
Healthcare
Gross Carrying Amount
Finite-Lived Intangible Assets, Gross
Right-of-use assets under finance leases:
Capital Leases, Balance Sheet, Assets by Major Class, Net [Abstract]
Leases [Abstract]
Leases [Abstract]
Entity Central Index Key
Entity Central Index Key
Term deposits
Time Deposits, at Carrying Value
Weighted average life of intangible assets
Finite-Lived Intangible Assets, Remaining Amortization Period
Amortization expense
Capitalized Computer Software, Amortization
Security Exchange Name
Security Exchange Name
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stock issued against stock-based compensation plans (in shares)
Number of options, exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Diluted (in shares)
Diluted weighted average common shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Other comprehensive (loss)/income
Other Comprehensive Income (Loss), Net of Tax
Recurring
Fair Value, Recurring [Member]
Income Taxes
Income Tax Disclosure [Text Block]
Interest payable
Interest Payable, Current
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Current Fiscal Year End Date
Current Fiscal Year End Date
Schedule of Stock Options Activity
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Payable to statutory authorities
Statutory Authority Payables, Current
Statutory Authority Payables, Current
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Capital Structure
Stockholders' Equity Note Disclosure [Text Block]
Reductions due to write-off of accounts receivable
Accounts Receivable, Allowance for Credit Loss, Writeoff
Components of Net Periodic Benefit Cost
Schedule of Net Benefit Costs [Table Text Block]
Unrealized gain/(loss) on cash flow hedges
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Settlement of convertible notes
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt
Other Current Assets
Other Current Assets [Text Block]
2026 and thereafter
Finite-Lived Intangible Asset, Expected Amortization, Year Five
Contract Acquisition and Fulfillment Costs
Capitalized Contract Cost [Table Text Block]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Indefinite-lived intangible assets:
Indefinite lived intangible assets [Abstract]
Indefinite lived intangible assets [Abstract]
Investment in equity affiliate
Payments to Acquire Equity Method Investments
Credit Facility [Axis]
Credit Facility [Axis]
Derivatives not designated as hedging instruments
Not Designated as Hedging Instrument [Member]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Net cash (used for)/provided by investing activities
Net Cash Provided by (Used in) Investing Activities
Change in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Less: Accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Foreign exchange contracts outstanding
Derivative Asset, Notional Amount
Weighted-average fair value, vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
General and administrative expenses
General and Administrative Expense [Member]
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Total current liabilities
Liabilities, Current
Total consideration
Payment, Tax Withholding, Share-based Payment Arrangement
Cash payments for amounts included in the measurement of lease liabilities :
Cash Flow, Operating Activities, Lessee [Abstract]
Reclassification adjustment for cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax
Assets acquired under finance lease
Lease Obligation Incurred
Performance Based Stock Awards
Performance Based Stock Awards [Member]
Performance Based Stock Awards [Member]
Operating cash outflows for finance leases
Finance Lease, Interest Payment on Liability
Maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Currency translation adjustments
Goodwill, Foreign Currency Translation Gain (Loss)
Gain/ (loss) on foreign currency exchange contracts
Reclassification out of Accumulated Other Comprehensive Income [Member]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Owned Assets:
Property, Plant and Equipment, Net, Excluding Capital Leased Assets [Abstract]
Revenue Based PRSUs
Revenue Based Performance Restricted Stock Units [Member]
Revenue Based Performance Restricted Stock Units [Member]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Credit Facilities [Line Items]
Line of Credit Facility [Line Items]
2021 (October 1 - December 31)
Finance Lease, Liability, to be Paid, Remainder of Fiscal Year
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Title of 12(b) Security
Title of 12(b) Security
Long-lived assets
Long-Lived Assets
Statement [Table]
Statement [Table]
Other current assets
Other current assets
Other Assets, Current
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Recent Accounting Pronouncements and Recently Adopted Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Cost of revenues
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization
Income Tax (Deferred) Recognized in Other Comprehensive Income
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Contract liabilities
Contract with Customer, Liability [Abstract]
Foreign currency exchange contracts, liability
Derivative Liability, Fair Value, Gross Liability
Analytics
Analytics [Member]
Analytics [Member]
Subsequent Event
Subsequent Event [Member]
Cover [Abstract]
Cover [Abstract]
Finance lease liabilities
Finance lease liabilities - Non-current
Finance Lease, Liability, Noncurrent
Schedule of Other Assets
Schedule of Other Assets [Table Text Block]
Total
Finite-Lived Intangible Assets, Net
Goodwill
Beginning Balance
Ending Balance
Goodwill
(Gain)/loss on cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax
Cost of revenues
Cost of Sales [Member]
Income taxes payable, net
Accrued Income Taxes, Current
Amortization of actuarial loss, net of tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax
Maximum outstanding term of the cash flow hedges
Maximum Length of Time Hedged in Cash Flow Hedge
Withholding taxes
Current Foreign Tax Expense (Benefit)
Schedule of Goodwill
Schedule of Goodwill [Table Text Block]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Repayment of the Notes in cash
Notes Payable, Related Parties
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Developed technology
Developed technology
Developed Technology Rights [Member]
Finance lease, right of use asset, gross
Property and equipment, gross
Finance Lease, Right-of-Use Asset, before Accumulated Amortization
Operating lease
Operating Lease, Cost
Related Party Disclosures
Related Party Transactions Disclosure [Text Block]
Geographic Distribution [Axis]
Geographic Distribution [Axis]
Unamortized debt discount
Debt Instrument, Unamortized Discount
Retirement benefits
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Movement in Allowance for Expected Credit Loss
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
Effective Interest Rate
Line of Credit Facility, Interest Rate During Period
Discretionary contributions towards 401(k) plan, maximum percentage
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Deferred income tax benefit
Deferred Income Tax Expense (Benefit)
Weighted-average remaining contractual life, vested and exercisable at end of period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term