Accelerated Share Repurchases, Final Price Paid Per Share Weighted average purchase price per share prior to the vesting date Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable, Current Accounts payable Accounts Receivable, Net, Current Accounts receivable, net Accrued expenses and other current liabilities. Accrued Expenses And Other Current Liabilities [Member] Accrued Expenses and Other Current Liabilities [Member] Accrued expenses. Accrued Expenses Current Accrued expenses Accrued Liabilities, Current Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Excluding Capital Leased Assets Less: Accumulated depreciation and amortization Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Useful life Additional Paid in Capital, Common Stock Additional paid-in-capital Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Aggregate disputed amount related to transfer pricing. Aggregate Disputed Amount Related To Transfer Pricing Aggregate disputed amount Allocated Share-based Compensation Expense Stock-based compensation expenses Amendment Flag Amendment Flag Amortization of Financing Costs Amortization of deferred financing costs Amortization of Intangible Assets Amortization expense Amounts paid as deposits in respect of Contingencies. Amounts Paid As Deposits In Respect Of Contingencies Amounts paid as deposits in respect of contingencies Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average common shares considered anti-dilutive in computing diluted earnings per share Approximate Percentage Of Performance Criteria Achieved And Shares Vested Approximate Percentage Of Performance Criteria Achieved And Shares Vested Performance based percentage Assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets, Fair Value Disclosure Total Assets, Fair Value Disclosure [Abstract] Assets Award Type [Axis] Award Type [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Bank guarantee issued. Bank Guarantee Issued Bank guarantees issued Base Rate [Member] ABR Loans [Member] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Blue Slate Ventures Limited Liability Company [Member] Blue Slate Ventures Limited Liability Company [Member] Blue Slate [Member] Building [Member] Buildings [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Date of Acquisition Agreement Acquisition pursuant to agreement and plan of merger date Business acquisition, Agreement date Number of restricted shares of common stock issued. Business Acquisition Restricted Stock Issued Business acquisition, Number of restricted shares of common stock issued Aggregate fair value amount of restricted shares of common stock. Business Acquisition Restricted Stock, Value, Issued Business acquisition, aggregate fair value amount of restricted shares of common stock Business Combination, Acquisition Related Costs Acquisition related costs Business Combination Disclosure [Text Block] Business Combinations, Goodwill and Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Total purchase price Amount recognized as of the acquisition date for the tangible assets acquired in excess of (less than) the aggregate liabilities assumed. Business Combination Recognized Tangible Assets Acquired And Liabilities Assumed Net Net tangible assets Business Combinations [Abstract] Business Combinations [Abstract] Business Combinations Policy [Policy Text Block] Business Combinations, Goodwill and Intangible Assets Capital Leased Assets, Gross Capital leased assets, Gross Capital Lease Obligations, Current Current portion of capital lease obligations Less: current portion Capital Lease Obligations, Noncurrent Capital lease obligations, less current portion Long term capital lease obligation Capital Leases, Balance Sheet, Assets by Major Class, Net Assets under capital leases, net Capital Leases, Balance Sheet, Assets by Major Class, Net [Abstract] Assets under capital leases: Capital Leases, Future Minimum Payments Due Total minimum lease payments Capital Leases, Future Minimum Payments, Due in Rolling Year Four 2018 Capital Leases, Future Minimum Payments, Due in Rolling Year Three 2017 Capital Leases, Future Minimum Payments, Due in Rolling Year Two 2016 Capital Leases, Future Minimum Payments, Interest Included in Payments Less: amount representing interest Capital Leases, Future Minimum Payments, Next Rolling Twelve Months 2015 Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Present value of minimum lease payments Present value of minimum lease payments Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Less: Accumulated depreciation and amortization The entire disclosure for the entity's capital structure, including but not limited to classes of stock and stock transactions. Capital Structure [Text Block] Capital Structure Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Net derivative losses which could be reclassified into earnings within the next 12 months Cash Flow Hedging [Member] Derivatives in Cash Flow Hedging Relationships [Member] Commitments and Contingencies Commitments and contingencies (See Note 15) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common stock aggregate purchase price including commission. Common Stock Aggregate Purchase Price Including Commission Common stock aggregate purchase price including commissions Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, $0.001 par value; 100,000,000 shares authorized, 34,122,806 shares issued and 32,777,971 shares outstanding as of September 30, 2014 and 33,342,312 shares issued and 32,172,183 shares outstanding as of December 31, 2013 Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income/(loss): Consolidation, Policy [Policy Text Block] Principles of Consolidation Construction in Progress [Member] Capital Work in Progress [Member] Cost of Sales [Member] Cost of Revenue [Member] Cost of Services, Excluding Depreciation, Depletion, and Amortization Cost of revenues (exclusive of depreciation and amortization) Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Customer Relationships [Member] Customer Relationships [Member] Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum Applicable interest rate on loans pegged to LIBO rate (Applicable Rate), maximum Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum Applicable interest rate on loans pegged to LIBO rate (Applicable Rate), minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Applicable interest rate on loans pegged to specified prime rate, maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Applicable interest rate on loans pegged to specified prime rate, minimum Debt Instrument, Interest Rate Terms Debt Instrument, Interest Rate Terms Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Rent Credit Deferred rent Deferred Rent Credit, Noncurrent Deferred rent Deferred Revenue, Current Deferred revenue Deferred Tax Assets, Net of Valuation Allowance, Current Deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred tax assets, net Defined benefit plan actuarial gain loss included in net gratuity cost. Defined Benefit Plan Actuarial Gain Loss Included In Net Gratuity Cost Actuarial loss Defined Benefit Plan, Benefits Paid Benefits paid Defined Benefit Plan, Contributions by Employer Employer contribution Defined Benefit Plan, Expected Return on Plan Assets Expected return on plan assets Defined benefit plan expected return on plan assets net. Defined Benefit Plan Expected Return On Plan Assets Net Expected return Defined benefit plan expected return on plan assets percentage. Defined Benefit Plan Expected Return On Plan Assets Percentage Percentage of actual return on the gratuity plans Defined Benefit Plan, Fair Value of Plan Assets Plan assets at September 30, 2014 Plan assets at January 1, 2014 Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets Effect of exchange rate changes Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Net Periodic Benefit Cost Net gratuity cost Defined Benefit Plan, Service Cost Service cost Defined Contribution Plan, Cost Recognized Company's contribution to the 401(k) Plan Defined Contribution Plan Disclosures [Table Text Block] Contribution to Various Defined Contribution Plans Defined Contribution Plan, Employer Discretionary Contribution Amount Contribution to various defined contribution plans Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Percentage of discretionary contributions towards 401(k) Plan, Maximum Depreciation Depreciation and amortization expense Depreciation, Depletion and Amortization Depreciation and amortization Derivative Contract [Domain] Derivative Contract [Domain] Derivative Asset, Fair Value, Gross Asset Foreign currency exchange contracts, Asset Derivative Liability, Fair Value, Gross Liability Foreign currency exchange contracts, Liability Derivative, Gain (Loss) on Derivative, Net Amount of Gain/(Loss) Recognized in Income on Derivatives Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instruments and Hedges, Liabilities Derivative instruments Derivative Instruments and Hedges, Liabilities, Noncurrent Derivative instruments Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivatives and Hedge Accounting Hedging Relationship [Axis] Hedging Relationship [Axis] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of Gain/(Loss) Recognized in AOCI on Derivative (Effective Portion) Derivative, Notional Amount Foreign exchange contracts outstanding Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Designated as Hedging Instrument [Member] Derivatives Designated as Hedging Instruments [Member] Developed Technology Rights [Member] Developed Technology [Member] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Restricted Stock Activity Under Company's Stock Plans Document and entity information. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Earnings per share: Earnings Per Share, Basic Basic Earnings Per Share, Basic and Diluted [Abstract] Earnings per share: Earnings Per Share, Diluted Diluted Earnings Per Share [Text Block] Earnings Per Share Effective Income Tax Rate Reconciliation, Percent Effective tax rates Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Employee-related Liabilities, Current Accrued employee cost Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Expected expensed over a weighted average period Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation cost for unvested Stock Units Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized compensation cost for unvested options Employee Stock Option [Member] Stock Option [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Revenue from External Customer [Line Items] Revenues and cost of revenues for Company's outsourcing services and transformation services segments [Line Items] Escrow Deposit Deposit in escrow accounts in connection with acquisition Eurodollar [Member] Eurodollar [Member] Export oriented units established percentage. Export Oriented Units Established Percentage Export-Oriented units established percentage 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] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Inputs, Disclosure [Text Block] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Option, Quantitative Disclosures [Table Text Block] Fair Value of Each Stock Option Granted to Employees Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months 2015 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five 2019 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four 2018 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three 2017 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two 2016 Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Asset, Useful Life Weighted average life of intangible assets Foreign Currency Contract, Asset, Fair Value Disclosure Derivative financial instruments Foreign Currency Contracts, Liability, Fair Value Disclosure Derivative financial instruments Foreign Currency Gain (Loss) [Member] Foreign Exchange Income/Loss [Member] Foreign Currency Transaction Gain (Loss), before Tax Foreign exchange income/(loss) Foreign Currency Transaction Gain (Loss), Unrealized Unrealized foreign exchange loss/(gain) Foreign Exchange Contract [Member] Foreign Currency Exchange Contracts [Member] Furniture and Fixtures [Member] Office Furniture and Equipment [Member] Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net Gain/(Losses) that reclassified from AOCI into earning for discontinued hedging transactions Gain (Loss) on Disposition of Assets Gain on sale of fixed assets Gain (Loss) on Disposition of Business Loss on sale of business unit Net loss recognized from the sale of business unit UNITED KINGDOM United Kingdom [Member] General and Administrative Expense General and administrative expenses General and Administrative Expense [Member] General and Administrative Expenses [Member] This element may be used to disclose in the entity's country of domicile and its entirety the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. This element also include amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in the entity's country of domicile and in foreign countries in total in which the entity holds assets. Geographical Information [Text Block] Geographical Information Goodwill Ending Balance Beginning Balance Goodwill Goodwill, Acquired During Period Goodwill arising from Blue Slate acquisition Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill [Line Items] Goodwill [Line Items] Goodwill, Translation Adjustments Currency translation adjustments Goodwill, Written off Related to Sale of Business Unit Allocation on sale of a business unit Gross Profit Gross profit Gross profit Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Hedging Relationship [Domain] Hedging Relationship [Domain] INDIA India [Member] Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income Statement [Abstract] Income Statement [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income Tax Examination, Interest Expense Recognized interest Income Tax Expense (Benefit) Income tax expense Income tax provision Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Income Taxes Payable Advance income tax, net Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Operating Capital [Abstract] Change in operating assets and liabilities: Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Accrued expenses and other liabilities Increase (Decrease) in Other Employee Related Liabilities Accrued employee cost Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Restricted Cash Restricted cash Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive effect of share based awards Indefinite-Lived Intangible Assets (Excluding Goodwill) Indefinite lived trade names and trademarks Intangible Assets, Gross (Excluding Goodwill) Gross Carrying Amount Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Net Carrying Amount Land [Member] Land [Member] Leasehold benefits. Leasehold Benefits [Member] Leasehold Benefits [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Leases [Abstract] Leases [Abstract] Leases of Lessee Disclosure [Text Block] Leases Liabilities Total liabilities Liabilities and Equity Total liabilities and stockholders' equity Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Financial and Nonfinancial Liabilities, Fair Value Disclosure Total Liabilities, Fair Value Disclosure [Abstract] Liabilities Liabilities, Noncurrent Non-current liabilities Non-current liabilities Liabilities, Noncurrent [Abstract] Summary of non-current liabilities Long-term Line of Credit Revolving credit facility Line of Credit Facility, Commitment Fee Percentage Commitment fee percentage range Long-lived Assets by Geographic Areas [Table Text Block] Fixed Assets, Net Based on Geographical Information Market Condition Based Performance Restricted Stock Units [Member] Market Condition Based Performance Restricted Stock Units [Member] Market Condition Based Performance Restricted Stock Units [Member] Maximum Length of Time Hedged in Cash Flow Hedge Maximum outstanding term of cash flow hedges Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Money market and mutual fund fair value disclosure. Money Market And Mutual Fund Fair Value Disclosure Money market and mutual funds Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Net Income (Loss) Attributable to Parent Net income Net income Net Income (Loss) Attributable to Parent [Abstract] Numerators: Net Income (Loss) Attributable to Noncontrolling Interest Non-controlling interest New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Noncompete Agreements [Member] Non-compete Agreements [Member] Not Designated as Hedging Instrument [Member] Derivatives not Designated as Hedging Instruments [Member] Nonoperating Income (Expense) Other income/(expense) Nonoperating Income (Expense) [Abstract] Other income/(expense) : Number Of Classes Of Common Stock Outstanding Number Of Classes Of Common Stock Outstanding Class of common stock outstanding Number of Reportable Segments Number of reportable segments Operating Expenses Operating expenses Total operating expenses Operating Expenses [Abstract] Operating expenses: Operating Income (Loss) Income from operations Operating Leases, Future Minimum Payments Due Total operating lease payments Operating Leases, Future Minimum Payments, Due in Rolling after Year Five 2020 and thereafter Operating Leases, Future Minimum Payments, Due in Rolling Year Five 2019 Operating Leases, Future Minimum Payments, Due in Rolling Year Four 2018 Operating Leases, Future Minimum Payments, Due in Rolling Year Three 2017 Operating Leases, Future Minimum Payments, Due in Rolling Year Two 2016 Operating Leases, Future Minimum Payments, Next Rolling Twelve Months 2015 Operating Leases, Rent Expense, Net Rent expense under both cancelable and non-cancelable operating leases Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization and Basis of Presentation Other Assets, Current Other current assets Other Assets [Member] Other Assets [Member] Other Assets, Noncurrent Other assets Other Commitment, Due in Next Twelve Months Purchase commitments, net of advances Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Reclassification adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Net of Tax Total other comprehensive income/(loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income/(loss): Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Realized loss on cash flow hedges, net of taxes $312, $422, $1,293 and $1,211, respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Taxes on realized loss on cash flow hedges Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Retirement benefits, net of taxes $6, $7, $21 and $24, respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax Retirement benefits, taxes Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized income/(loss) on effective cash flow hedges, net of taxes ($758), ($1,359), $1,428 and ($3,048), respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Taxes on unrealized income/(loss) on cash flow hedges Other Current Assets [Member] Other Current Assets [Member] Other Liabilities, Current Other current liabilities Other Liabilities, Noncurrent Other non-current liabilities Other Noncurrent Liabilities [Member] Other Non-Current Liabilities [Member] Other Noncurrent Liabilities [Table Text Block] Summary of Non-current Liabilities Other Nonoperating Income (Expense) Interest and other income, net Outsourcing services. Outsourcing Services [Member] Outsourcing Services [Member] Overland Solutions Inc [Member] Overland Solutions Inc [Member] Overland Holdings, Inc.[Member] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Payment of bank guarantee. Payment Of Bank Guarantee Deposited or Bank guarantees provided Payments for Repurchase of Common Stock Acquisition of treasury stock Payments Related to Tax Withholding for Share-based Compensation Withholding tax payments related to the vesting of restricted stock for total consideration Payments to Acquire Businesses, Gross Aggregate merger consideration for outstanding capital stock Business acquisition, cash consideration Payments to Acquire Businesses, Net of Cash Acquired Business acquisition (net of cash acquired) Payments to Acquire Property, Plant, and Equipment Purchase of fixed assets Payments to Acquire Short-term Investments Purchase of short-term investments Payments to Noncontrolling Interests Payment for purchase of non-controlling interest Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plans Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Retirement benefits Performance Based Stock Awards [Member] Performance Based Stock Awards [Member] Performance Based Stock Awards [Member] PHILIPPINES Philippines [Member] Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Value, Issued Preferred stock, $0.001 par value; 15,000,000 shares authorized, none issued Prepaid Expense, Current Prepaid expenses Prepaid Taxes Advance income tax, net Proceeds from Sale of Short-term Investments Proceeds from redemption of short-term investments Proceeds from Stock Options Exercised Proceeds from exercise of stock options Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment Disclosure [Text Block] Fixed Assets Property, Plant and Equipment, Gross, Excluding Capital Leased Assets Owned Assets, Gross Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Net Fixed assets, net Fixed assets, net Total Fixed assets Property, Plant and Equipment, Net [Abstract] Fixed assets, net Property, Plant and Equipment, Net, Excluding Capital Leased Assets Owned Assets, net Property, Plant and Equipment, Net, Excluding Capital Leased Assets [Abstract] Owned Assets: Property, Plant and Equipment [Table Text Block] Schedule of Fixed Assets Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification Out of Accumulated Other Comprehensive Income [Member] Reduction in revenues related to reimbursement of transition related costs. Reduction In Revenuer Relate To Client Reimbursements Reduction in revenues related to reimbursement of transition related costs Repayments of Long-term Capital Lease Obligations Principal payments on capital lease obligations Research, Development, and Computer Software, Policy [Policy Text Block] Software Development Costs Rest of World. Rest Of World [Member] Rest of World [Member] Restricted Cash and Cash Equivalents, Current Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Restricted cash Restricted Stock [Member] Restricted Stock [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units [Member] Restricted Stock Units Vested For Which Underlying Common Stock To Be Issued Restricted Stock Units Vested For Which Underlying Common Stock To Be Issued Restricted stock units vested for which underlying common stock to be issued Retained Earnings (Accumulated Deficit) Retained earnings Revenue Based Performance Restricted Stock Units [Member] Revenue Based Performance Restricted Stock Units [Member] Revenue Based Performance Restricted Stock Units [Member] Revenue from External Customers by Geographic Areas [Table Text Block] Revenues Based on Geographical Information Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Revenues [Abstract] Revenues Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Sales Revenue, Services, Net Revenues Schedule of Accrued Liabilities [Table Text Block] Summary of Accrued Expenses and Other Current Liabilities Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule Of Business Combination Purchase Price Allocation [Line Items] Schedule Of Business Combination Purchase Price Allocation [Line Items] Schedule Of Business Combination Purchase Price Allocation [Line Items] Schedule Of Business Combination Purchase Price Allocation [Table] Schedule Of Business Combination Purchase Price Allocation [Table] Schedule Of Business Combination Purchase Price Allocation [Table] Schedule of Changes in Fair Value of Plan Assets [Table Text Block] Change in Plan Assets Derivative Instruments, Gain (Loss) [Table Text Block] Summary of Effect of Foreign Currency Exchange Contracts on Consolidated Statements of Income Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of Basic and Diluted Earnings Per Share Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Costs Related to Company's Stock-Based Compensation Plan Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Assets and Liabilities Measured at Fair Value Tabular disclosure of amortizable finite-lived intangible assets, in total and by major class, including the gross carrying amount and accumulated amortization, and indefinite-lived intangible assets not subject to amortization, excluding goodwill, in total and by major class. Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class Table [Text Block] Summary of Company's Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Estimated Amortization of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block] Summary of Fair Value of Foreign Currency Exchange Contracts Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Future Minimum Lease Payments under Capital Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Future Minimum Lease Payments under Non-Cancelable Operating Lease Agreements Expiring After September 30, 2014 Schedule of Goodwill [Table] Schedule of Goodwill [Table] Schedule of Goodwill [Table Text Block] Summary of Company's Goodwill Schedule of Net Benefit Costs [Table Text Block] Net Gratuity Cost Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of Purchase Price Allocation for Acquisitions Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Revenues and Cost of Revenues for Company's Outsourcing Services and Transformation Services Segments Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Stock Based Compensation Stock Option Activity Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Summary of Activity Related to Gross Unrecognized Tax Benefits Geographical [Domain] Geographical [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Selling and Marketing Expense Selling and marketing expenses Selling and Marketing Expense [Member] Selling and Marketing Expenses [Member] Share-based Compensation Stock-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted-Average Fair Value, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number, Granted Share-based 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Working Capital Baseline And Other Adjustments As Of Acquisition Date Working capital adjustments included in business acquisitions cash consideration