Accounts Payable Current Accounts payable Accounts Receivable Gross Accounts receivable from customer Accounts Receivable Net Current Accounts receivable, net of allowance for doubtful accounts of $ 2,036 and $ 2,407 at September 30,2012 and December 31,2011, respectively Accrued Income Taxes Accrued taxes, likely amount Accrued Income Taxes Current Income taxes payable Accrued Liabilities Current Accrued liabilities Accumulated Defined Benefit Plans Adjustment [Member] Defined Benefit Plans Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Less accumulated depreciation and amortization Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] Gains(losses) on net investment-hedge derivatives Accumulated Net Unrealized Investment Gain Loss [Member] Unrealized Gains on Securities Accumulated Other Comprehensive Income (Loss), change in component during period Accumulated Other Comprehensive Income Loss Change In Component During Period Current Period Change Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Loss Net Of Tax Ending Balance Beginning balance Accumulated Other Comprehensive Income Loss Net Of Tax [Text Block] Accumulated Other Comprehensive Income Loss Net Of Tax [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME(LOSS) Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income [Member] Accumulated other Comprehensive Loss Accumulated Translation Adjustment [Member] Foreign Currency translation adjustments Additional branch profit taxes if profits were not invested Additional Branch Profit Taxes If Profits Were Not Invested Additional branch profit taxes if profits were not permanently invested Additional Five Years [Member] Additional Five Years [Member] Another Five Years Additional Paid In Capital [Member] Additional Paid-In Capital Additional Tax Information [Axis] Additional Tax Information [Axis] Additional Tax Information [Axis] Additional Tax Information [Domain] Additional Tax Information [Domain] Additional Tax Information [Domain] Additional Three Years [Member] Additional Three Years [Member] Additional Three Years Additional Two Years [Member] Additional Two Years [Member] Additional Two Years 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 Allocated Share Based Compensation Expense Restricted stock-based compensation expense Allowance For Doubtful Accounts Receivable Current Accounts receivable, allowance for doubtful accounts Amendment Flag Amendment Flag American Express American Express [Member] American Express Corp. Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Potential dilutive effect of stock options outstanding, Weighted Average Shares Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount Potential dilutive effect of stock options outstanding, Earnings per Share Applications Outsourcing Applications Outsourcing [Member] Applications Outsourcing Assets TOTAL ASSETS Assets [Abstract] ASSETS Assets Current Total current assets Assets Current [Abstract] Current assets: Assets Fair Value Disclosure Total Assets measured at fair value Available For Sale Securities Fair Value Disclosure Short Term Investments- Available for Sale Securities Average Remaining Maturity Of Foreign Currency Derivatives 1 Weighted average maturity Award Type [Axis] Award Type [Axis] Bank Of India And Punjab National Bank [Member] Bank Of India And Punjab National Bank [Member] Bank Of India And Punjab National Bank Bank Of India [Member] Bank Of India [Member] Bank Of India Basis Of Accounting BASIS OF PRESENTATION Branch profit tax Branch Profit Tax Branch Profit Tax (BPT) 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 Disclosure [Text Block] CASH AND CASH EQUIVALENTS Cash And Cash Equivalents [Member] Cash & Cash Equivalents Cash And Cash Equivalents Period Increase Decrease Change in cash and cash equivalents Common stock dividend declared by an entity which is unpaid as of reporting date. Cash Dividends Declared But Unpaid Cash dividends declared but unpaid Cash Equivalents, Maturity Period Cash Equivalents Maturity Period Cash and Cash Equivalents, maturity period Certain Units In SEZ [Member] Certain Units In Sez [Member] Certain Units In Sez Client Contracts [Member] Client Contracts [Member] Client Contracts Closure of service tax audit objection amount Closure Of Service Tax Audit Objection Amount Closure of service tax audit objection amount Common Stock Capital Shares Reserved For Future Issuance Common stock reserved for issuance Common Stock Dividends Per Share Declared Dividend per share Common Stock [Member] Common Stock Compensated Absences Liability Amounts accrued for unutilized earned leave Compensation And Employee Benefit Plans [Text Block] Employee Benefit Plans Completion of Tax Holiday Period [Member] Completion Of Tax Holiday Period [Member] Completion of Tax Holiday Period Components of Taxes Other Than Income [Line Items] Components Of Taxes Other Than Income [Line Items] Components of Taxes Other Than Income [Line Items] Components of Taxes Other Than Income [Table] Components Of Taxes Other Than Income [Table] Components of Taxes Other Than Income [Table] Comprehensive Income Net Of Tax Comprehensive Income(Loss) Comprehensive Income Note [Text Block] TAX ON OTHER COMPREHENSIVE INCOME (LOSS) Concentration Risk Percentage 1 Concentration of sales by customer Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined). Consolidation Of Variable Interest Entity [Text Block] CONSOLIDATION OF A VARIABLE INTEREST ENTITY Corporate Income Taxes Exemption Percentage Corporate Income Taxes Exemption Percentage Corporate income taxes, exemption percentage Corporate Income Tax Exemption Periods [Axis] Corporate Income Tax Exemption Periods [Axis] Corporate Income Tax Exemption Periods [Axis] Corporate Income Tax Exemption Periods [Domain] Corporate Income Tax Exemption Periods [Domain] Corporate Income Tax Exemption Periods [Domain] Cost Of Revenue Cost of revenues Cost Of Sales [Member] Cost Of Revenues Costs In Excess Of Billings On Uncompleted Contracts Or Programs Revenue earned in excess of billings Current Fiscal Year End Date Current Fiscal Year End Date Deferred Compensation Arrangement With Individual Excluding Share Based Payments And Postretirement Benefits By Title Of Individual [Axis] Deferred Bonus and Profit Sharing Plan by Title of Individual [Axis] Deferred Compensation Arrangement With Individual Excluding Share Based Payments And Postretirement Benefits [Line Items] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Deferred Income Taxes And Other Assets Current Deferred income taxes and other current assets Deferred Income Taxes And Other Assets Noncurrent Deferred income taxes and other non current assets Deferred Other Tax Expense Benefit Fringe benefit tax expense, reversed Deferred other tax expense benefit refund Deferred Other Tax Expense Benefit Refund Fringe benefit tax refund Deferred Revenue Current Deferred revenue Deferred Tax Assets Net Deferred tax assets Deferred tax liabilities, branch profit tax Deferred Tax Liabilities Branch Profit Tax Accumulated deferred tax liability on BPT Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Unrecognized Indian income tax liabilities Defined Benefit Plan Contributions By Employer Contribution expense recognized by Indian entities Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined benefit plan employee contribution amount. Defined Benefit Plan Employee Contribution Amount Employee contribution amount Defined benefit plan employee contribution percentage Defined Benefit Plan Employee Contribution Percentage Employee contribution percentage Defined Benefit Plans Disclosures Defined Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Depreciation Depletion And Amortization Depreciation and amortization Derivative Amount Outstanding Derivative Amount Outstanding Foreign exchange forward contracts amount outstanding Derivative Contracts Expired Derivative Contracts Expired Derivative contracts expired Derivative Gain On Derivative Gain on expiration of contracts Derivative Higher Remaining Maturity Range 1 Foreign exchange forward contracts, maturity date Derivative Instruments And Hedging Activities Disclosure [Text Block] DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments Designated as Cash Flow Hedges Activity Disclosure [Table Text Block] Derivative Instruments Designated As Cash Flow Hedges Activity Disclosure Table [Text Block] Summary Information About Forward Contracts to Sell US Dollars and Buy Indian Rupees Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments Gain Loss [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net Gains(losses)recognized in Other Comprehensive Income(Loss) Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion Forward contract gain recorded as other comprehensive income Derivative Instruments Not Designated As Hedging Instruments [Abstract] Derivatives not designated as hedges: Derivative [Line Items] Derivative [Line Items] Derivative Lower Remaining Maturity Range 1 Foreign exchange forward contracts, maturity date Derivative Notional Amount Foreign exchange forward contracts, notional amount Notional amounts Derivatives Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivatives Not Designated as Hedging Instruments [Member] Derivatives Not Designated As Hedging Instruments [Member] Derivatives Not Designated as Hedging Instruments Derivative [Table] Derivative [Table] Designated As Hedging Instrument [Member] Designated as Hedging Instrument Disclosure - Assumptions Used in Black Scholes Model to Value Options Granted [Abstract] Disclosure Assumptions Used In Black Scholes Model To Value Options Granted [Abstract] Disclosure - Assumptions Used in Black Scholes Model to Value Options Granted [Abstract] Disclosure - Cash and Cash Equivalents - Additional Information [Abstract] Disclosure Cash And Cash Equivalents Additional Information [Abstract] Disclosure - Cash and Cash Equivalents - Additional Information [Abstract] Disclosure - Change in Balances of Accumulated Comprehensive Income [Abstract] Disclosure Change In Balances Of Accumulated Comprehensive Income [Abstract] Disclosure - Change in Balances of Accumulated Comprehensive Income [Abstract] Disclosure - Consolidation of Variable Interest Entity - Additional Information [Abstract] Disclosure Consolidation Of Variable Interest Entity Additional Information [Abstract] Disclosure - Consolidation of Variable Interest Entity - Additional Information [Abstract] Disclosure Derivative Instrumentsand Hedging Activities Additional Information [Abstract] Disclosure Derivative Instrumentsand Hedging Activities Additional Information [Abstract] Disclosure Derivative Instrumentsand Hedging Activities Additional Information [Abstract] Disclosure - Differentiation between Federal Statutory Tax Rate and Effective Tax Rate [Abstract] Disclosure Differentiation Between Federal Statutory Tax Rate And Effective Tax Rate [Abstract] Disclosure - Differentiation between Federal Statutory Tax Rate and Effective Tax Rate [Abstract] Disclosure - Employee Benefit Plans - Additional Information [Abstract] Disclosure Employee Benefit Plans Additional Information [Abstract] Disclosure - Employee Benefit Plans - Additional Information [Abstract] Disclosure - Financial Assets Measured at Fair Value on Recurring Basis [Abstract] Disclosure Financial Assets Measured At Fair Value On Recurring Basis [Abstract] Disclosure - Financial Assets Measured at Fair Value on Recurring Basis [Abstract] Disclosure Income Taxes Additional Information [Abstract] Disclosure Income Taxes Additional Information [Abstract] Disclosure Income Taxes Additional Information [Abstract] Disclosure - Legal Expenses Exposures and Contingencies - Additional Information [Abstract] Disclosure Legal Expenses Exposures And Contingencies Additional Information [Abstract] Disclosure - Legal Expenses Exposures and Contingencies - Additional Information [Abstract] Disclosure - Net Gains or Losses Recorded in Accumulated Other Comprehensive Income Relating to Foreign Exchange Contracts Designated as Net Investment Hedges [Abstract] Disclosure Net Gains Or Losses Recorded In Accumulated Other Comprehensive Income Relating To Foreign Exchange Contracts Designated As Net Investment Hedges [Abstract] Disclosure - Net Gains or Losses Recorded in Accumulated Other Comprehensive Income Relating to Foreign Exchange Contracts Designated as Net Investment Hedges [Abstract] Disclosure - Net Gains or Losses Recorded in Other Income and Consolidated Statements of Income Relating to Foreign Exchange Contracts Not Designated as Hedges [Abstract] Disclosure Net Gains Or Losses Recorded In Other Income And Consolidated Statements Of Income Relating To Foreign Exchange Contracts Not Designated As Hedges [Abstract] Disclosure - Net Gains or Losses Recorded in Other Income and Consolidated Statements of Income Relating to Foreign Exchange Contracts Not Designated as Hedges [Abstract] Disclosure - Net Revenues and Long Lived Assets by Geographic Area [Abstract] Disclosure Net Revenues And Long Lived Assets By Geographic Area [Abstract] Disclosure - Net Revenues and Long Lived Assets by Geographic Area [Abstract] Disclosure Of Compensation Related Costs Share Based Payments [Text Block] STOCK BASED COMPENSATION Disclosure Related Party Transactions Additional Information [Abstract] Disclosure Related Party Transactions Additional Information [Abstract] Disclosure Related Party Transactions Additional Information [Abstract] Disclosure - Schedule of Basic and Diluted Earnings Per Share [Abstract] Disclosure Schedule Of Basic And Diluted Earnings Per Share [Abstract] Disclosure - Schedule of Basic and Diluted Earnings Per Share [Abstract] Disclosure - Schedule of Segment Wise Revenues and Gross Profits [Abstract] Disclosure Schedule Of Segment Wise Revenues And Gross Profits [Abstract] Disclosure - Schedule of Segment Wise Revenues and Gross Profits [Abstract] Disclosure - Schedule of Total Taxes on Other Comprehensive Income [Abstract] Disclosure Schedule Of Total Taxes On Other Comprehensive Income [Abstract] Disclosure - Schedule of Total Taxes on Other Comprehensive Income [Abstract] Disclosure Segment Reporting Additional Information [Abstract] Disclosure Segment Reporting Additional Information [Abstract] Disclosure Segment Reporting Additional Information [Abstract] Disclosure Stock Based Compensation Additional Information [Abstract] Disclosure Stock Based Compensation Additional Information [Abstract] Disclosure Stock Based Compensation Additional Information [Abstract] Disclosure - Stock Based Compensation Impact on Company Operations [Abstract] Disclosure Stock Based Compensation Impact On Company Operations [Abstract] Disclosure - Stock Based Compensation Impact on Company Operations [Abstract] Disclosure - Summary Information about Derivatives Not Designated as Hedges [Abstract] Disclosure Summary Information About Derivatives Not Designated As Hedges [Abstract] Disclosure - Summary Information about Derivatives Not Designated as Hedges [Abstract] Disclosure - Summary Information about Forward Contracts to Sell US Dollars and Buy Indian Rupees [Abstract] Disclosure Summary Information About Forward Contracts To Sell U S Dollars And Buy Indian Rupees [Abstract] Disclosure - Summary Information about Forward Contracts to Sell US Dollars and Buy Indian Rupees [Abstract] Disclosure - Term Deposits with Various Banks Outstanding [Abstract] Disclosure Term Deposits With Various Banks Outstanding [Abstract] Disclosure - Term Deposits with Various Banks Outstanding [Abstract] Disclosure - Vacation Pay - Additional Information [Abstract] Disclosure Vacation Pay Additional Information [Abstract] Disclosure - Vacation Pay - Additional Information [Abstract] Dividends Common Stock Dividends Dividends Payable Current Dividends payable Document Documentand Entity Information [Abstract] Document Documentand Entity Information [Abstract] Document Documentand Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Information [Line Items] Document Information [Line Items] Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] EARNINGS PER SHARE: Earnings Per Share Basic Basic Basic earnings per share, Earnings per Share Earnings Per Share Basic And Diluted [Line Items] Earnings Per Share Basic And Diluted [Line Items] Earnings Per Share Basic And Diluted [Line Items] Earnings Per Share Diluted Diluted Diluted earnings per share, Earnings Per Share Earnings Per Share [Text Block] EARNINGS PER SHARE E-Business E Business [Member] E-Business Effective Income Tax Rate Continuing Operations Effective Income Tax Rate Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Statutory provision Statutory Rate Effective Income Tax Rate Reconciliation Deductions Other Others, net Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential Foreign effective tax rates different from US statutory rate Effective Income Tax Rate Reconciliation Other Adjustments Tax reserve Effective Income Tax Rate Reconciliation State And Local Income Taxes State taxes, net of federal benefit Effect Of Exchange Rate On Cash And Cash Equivalents Effect of foreign currency exchange rate changes on cash Employee Related Liabilities Current Accrued payroll and related costs Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs Report Line [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options Excess tax benefits on stock-based compensation plans Employee Stock Option [Member] Employee Stock Option Entities [Table] Entities [Table] Entity Central Index Key Entity Central Index Key Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Entity [Domain] Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Entity Wide Revenue Major Customer Amount Total consolidated revenue from customer Entity Wide Revenue Major Customer [Line Items] Revenue, Major Customer [Line Items] Entity Wide Revenue Major Customer Percentage Percent of total consolidated revenues from customer Equity Component [Domain] Equity Component [Domain] Europe [Member] Europe [Member] Europe Excess Tax Benefit From Share Based Compensation Financing Activities Excess tax benefits on stock-based compensation plans Executive Compensation Plan Expense [Line Items] Executive Compensation Plan Expense [Line Items] Executive Compensation Plan Expense [Line Items] Executive Compensation Plan Expense [Table] Executive Compensation Plan Expense [Table] Executive Compensation Plan Expense [Table] 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 Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques Table [Text Block] Financial Assets Measured At Fair Value On A Recurring Basis Fair Value By Fair Value Hierarchy Level [Axis] Fair Value, Hierarchy [Axis] Fair Value Inputs Level 1 [Member] Level 1 Fair Value Inputs Level 2 [Member] Level 2 Fair Value Measurement Inputs Disclosure [Text Block] FAIR VALUE MEASUREMENTS Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] First Five Years [Member] First Five Years [Member] First Five Years Foreign Currency Contract Asset Fair Value Disclosure Fair value of foreign exchange forward contracts Foreign Currency Contracts Liability Fair Value Disclosure Fair value of foreign exchange forward contracts Foreign Exchange Forward [Member] Foreign Exchange Forward Fringe Tax Benefit Rate Fringe Tax Benefit Rate Fringe benefit tax rate Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Gains(losses)recognized in other income,net Gain Loss On Sale Of Investments Realized gains on sales of short term investments Gain Loss On Sale Of Property Plant Equipment Gain on sale of property and equipment Gains Losses On Sales Of Other Real Estate Gain on sale of property and equipment Geographic Information Geographic Information [Text Block] GEOGRAPHIC INFORMATION Goodwill Goodwill Gratuity Plan [Member] Gratuity Plan [Member] Gratuity Plan Gross charge for unutilized earned leave. Gross Charge For Unutilized Earned Leave Gross charge for unutilized earned leave Gross Profit Gross profit Gross profit Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] I N INDIA Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income from operations Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments 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 Adjustments Provision Reversal Income Tax Adjustments Provision Reversal Income tax adjustments provision reversal Income Tax Audit Service Tax Objection Amount Income Tax Audit Service Tax Objection Amount Income tax audit, service tax objection amount Income Tax Credits And Adjustments Uncertain tax positions and other tax credits Income Tax Disclosure [Text Block] INCOME TAXES Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes Paid Cash paid for income taxes Income taxes paid Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Tax Examination Liability Recorded Income tax liability recognized Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority Refund claim Income Tax Examination Penalties And Interest Expense Expense recognized for accrued interest and penalties Income Tax Expense Benefit Income tax expense Income Tax Rate Reconciliation [Line Items] Income Tax Rate Reconciliation [Line Items] Income Tax Rate Reconciliation [Line Items] Income Tax Rate Reconciliation [Table] Income Tax Rate Reconciliation [Table] Income Tax Rate Reconciliation [Table] Income Tax Years Open Income Tax Years Open Corporate income taxes, years Increase Decrease In Accounts Payable And Accrued Liabilities Accrued payroll and other liabilities Increase Decrease In Deferred Income Taxes Deferred income taxes Increase Decrease In Deferred Revenue Deferred revenue Increase Decrease In Operating Capital [Abstract] Changes in assets and liabilities: Increase Decrease In Other Operating Assets Other assets Increase Decrease In Receivables Accounts receivable and revenue earned in excess of billings Intercompany Contracts [Member] Intercompany Contracts [Member] Intercompany Contracts Investments And Other Noncurrent Assets [Text Block] Term Deposits JP Morgan Chase Bank NA [Member] Jp Morgan Chase Bank Na [Member] Jp Morgan Chase Bank Na Knowledge Process Outsourcing Knowledge Process Outsourcing [Member] KPO Legal Entity [Axis] Legal Entity [Axis] Legal Matters And Contingencies [Text Block] Legal Expenses, Exposures and contingencies Liabilities TOTAL LIABILITIES Liabilities [Abstract] LIABILITIES Liabilities And Stockholders Equity TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities And Stockholders Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities Current Total current liabilities Liabilities Current [Abstract] Current liabilities: Liabilities Fair Value Disclosure Total Liabilities measured at fair value Limitation of liability, amount of retained holdback Limitation Of Liability Amount Of Retained Holdback Limitation of liability, amount of retained holdback Line Of Credit Facility [Axis] Lender Name [Axis] Line Of Credit Facility Expiration Date 1 Line of credit, expiration date Line Of Credit Facility Lender [Domain] Line of Credit Facility, Lender [Domain] Line Of Credit Facility Maximum Borrowing Capacity Line of credit, maximum borrowings Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency, Expected Trial Commencement Date Loss Contingency Expected Trial Commencement Date Income tax department appeal, rescheduled date Loss Contingency Hearing Date Loss Contingency Hearing Date Appeals for hearing before the ITAT, date Major Customers [Axis] Major Customers [Axis] Maximum [Member] Maximum Minimum [Member] Minimum Minority Interest Ownership Percentage By Parent Ownership percentage in subsidiary Money Market Funds At Carrying Value Cash & Cash Equivalents Money Market Funds Money market fund Mumbai [Member] Mumbai [Member] Mumbai Name Of Major Customer [Domain] Name of Major Customer [Domain] Net Cash Provided By Used In Financing Activities Net cash used in financing activities Net Cash Provided By Used In Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided By Used In Investing Activities Net cash used in investing activities Net Cash Provided By Used In Investing Activities [Abstract] CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided By Used In Operating Activities Net cash provided by operating activities Net Cash Provided By Used In Operating Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Income Loss Net income Net income New Units In SEZ [Member] New Units In Sez [Member] New Units In Sez Next Five Years [Member] Next Five Years [Member] Next Five Years Nineteen Ninety Six To Seven Nineteen Ninety Seven To Eight And Two Thousand One To Two [Member] Nineteen Ninety Six To Seven Nineteen Ninety Seven To Eight And Two Thousand One To Two [Member] 1996-97, 1997-98 and 2001-02 Noncurrent Assets Long-lived assets Non-Current Assets [Member] Noncurrent Assets [Member] Non Current Assets Non-Employee Directors [Member] Non Employee Directors [Member] Non-Employee Directors North America [Member] North America [Member] North America Number Of Clients Number Of Clients Number of clients Number of customers Number Of Customers Number of customers Number Of Operating Segments Number of business segments Number of Units Number Of Units Number of units Operating Income Loss Income from operations Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] PRINCIPLES OF CONSOLIDATION AND ORGANIZATION Other Assets Fair Value Disclosure Other assets Other Comprehensive Income Available For Sale Securities Adjustment Before Tax Period Increase Decrease [Abstract] Unrealized gains(losses) on securities: Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent Unrealized gains on securities, Total Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent Defined Benefit Pension plans, Total Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent [Abstract] Defined benefit pension plans: Other Comprehensive Income Derivatives Qualifying As Hedges Before Tax Period Increase Decrease [Abstract] Gains (losses) on derivatives: Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent Foreign currency translation adjustments Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax Amortization of prior service cost included in net periodic pension cost Other Comprehensive Income Loss Before Tax Portion Attributable To Parent Other comprehensive income(loss), before tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Other comprehensive income, net of tax Other comprehensive income(loss), net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract] Other Comprehensive Income(Loss) Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax (Tax) on Defined benefit pension plans Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax Reclassification adjustment for gains included in net income Other Comprehensive Income Loss Tax Total (taxes)benefit on Other Comprehensive Income (loss) Other Comprehensive Income Loss Tax Portion Attributable To Parent 1 Income tax expenses related to other comprehensive income(loss) Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax Net Profit(loss) arising during period Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax Gains (losses) arising during period on net investment hedges Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax Unrealized holding gains arising during period Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax (Taxes) benefit on Unrealized gains(losses) on securities Other Disputes [Member] Other Disputes [Member] Other Disputes Other Liabilities Fair Value Disclosure Other liabilities Other Liabilities Noncurrent Other non current liabilities Other Nonoperating Income Other income,net Payments Of Dividends Common Stock Dividends paid Payments To Acquire Other Investments Purchase of term deposits with banks Payments To Acquire Property Plant And Equipment Property and equipment expenditures Payments To Acquire Short Term Investments Purchase of mutual funds Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent Accrued liability for retirement plan Percentage of shares vested Percentage Of Shares Vested Percentage of shares vested Percent Of Shares Issued Percent Of Shares Issued Percent of shares issued Performance Shares [Member] Performance Shares Period for Tax Exemption Period For Tax Exemption Exemption from corporate income taxes Phase 1 [Member] Phase One [Member] 2005-06 Phase 2 [Member] Phase Two [Member] 2006-07 Proceeds From Issuance Of Common Stock Net proceeds from issuance of common stock Proceeds From Sale Of Other Investments Maturities of term deposits with banks Proceeds From Sale Of Other Real Estate Proceeds from sale of property and equipment Proceeds From Sale Of Property Plant And Equipment Proceeds from sale of property and equipment Proceeds From Sale Of Short Term Investments Proceeds from sales of mutual funds Profit Loss Incurred losses of subsidiary Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Gross Property and equipment Property Plant And Equipment Net Property and equipment, net Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Provident Fund [Member] Provident Fund [Member] Provident Fund Provision For Doubtful Accounts Provision for doubtful debts / advances Range [Axis] Range [Axis] Range [Member] Range [Domain] Reasonably Possible Significant Change In Unrecognized Tax Benefits By Item [Axis] Nature of Uncertainty [Axis] Related Party [Domain] Related Party [Domain] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related Party Transactions By Related Party [Axis] Related Party [Axis] Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS Related Party Transactions [Member] Related Party Transactions [Member] Transaction with CEO & President of the Company Rest Of The World [Member] Rest Of World [Member] Rest Of The World Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Cash and Cash Equivalents [Domain] Restricted Cash And Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Stock Expense Compensation expense related to restricted stock Restricted Stock Units R S U [Member] Restricted Stock Retained Earnings [Member] Retained Earnings Revenue Recognition [Text Block] Revenue Recognition [Text Block] REVENUE RECOGNITION Revenues Net revenues Schedule Of Cash Flow Hedges Included In Accumulated Other Comprehensive Income Loss Table [Text Block] Change in Balances of Accumulated Comprehensive Income Schedule Of Comprehensive Income Loss Table [Text Block] Schedule Of Total Taxes On Other Comprehensive Income Schedule Of Deferred Compensation Arrangement With Individual Excluding Share Based Payments And Postretirement Benefits By Title Of Individual And By Type Of Deferred Compensation [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule Of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Schedule Of Derivative Instruments Effect On Other Comprehensive Income Loss Table [Text Block] Net Gains or Losses Recorded in Accumulated Other Comprehensive Income Relating to Foreign Exchange Contracts Designated As Net Investment Hedges Schedule Of Derivatives Not Designated As Cash Flow Hedges Table [Text Block] Schedule Of Derivatives Not Designated As Cash Flow Hedges Table [Text Block] Summary Information About the Derivatives Not Designated as Hedges Schedule Of Earnings Per Share Basic And Diluted [Table] Schedule Of Earnings Per Share Basic And Diluted [Table] Schedule Of Earnings Per Share Basic And Diluted [Table] Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule Of Basic And Diluted Earnings Per Share Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block] Schedule Of Effective Income Tax Rate Reconciliation Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs By Report Line [Axis] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] 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 [Text Block] Stock-Based Compensation Impact On Company's Operations Schedule Of Entity Wide Disclosure On Geographic Areas Long Lived Assets In Individual Foreign Countries By Country [Text Block] Schedule Of Net Revenues And Long-Lived Assets By Geographic Area Schedule Of Entity Wide Revenue By Major Customers By Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Axis] Schedule of Fair Value of Separate Accounts by Major Category of Investment [Axis] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment Category [Domain] Schedule of Fair Value of Separate Accounts by Major Category of Investment, Category [Domain] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items] Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Table] Schedule of Fair Value of Separate Accounts by Major Category of Investment [Table] Schedule of Funds on Deposit [Table Text Block] Schedule Of Funds On Deposit Table [Text Block] Term Deposits With Various Banks Outstanding Schedule Of New Accounting Pronouncements And Changes In Accounting Principles [Text Block] RECENT ACCOUNTING PRONOUNCEMENTS Schedule Of Other Derivatives Not Designated As Hedging Instruments Statements Of Financial Performance And Financial Position Location Table [Text Block] Net Gains or Losses Recorded in Other Income and Consolidated Statements of Income Relating to Foreign Exchange Contracts Not Designated As Hedges Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Schedule Of Restricted Cash And Cash Equivalents [Table] Schedule of Restricted Cash and Cash Equivalents [Table] Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule Of Segment Reporting Information By Segment [Text Block] Schedule Of Segment-Wise Revenues And Gross Profits 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 Payment Award Stock Options Valuation Assumptions Table [Text Block] Assumptions Used In The Black-Scholes Model To Value Options Granted Segment [Domain] Segment [Domain] Segment Geographical [Domain] Segment, Geographical [Domain] Segment Reporting Disclosure [Text Block] SEGMENT REPORTING Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Segment Reporting Information [Table] Segment Reporting Information [Table] Segment Reporting Information [Table] Selling General And Administrative Expense Selling, general and administrative expenses Selling General And Administrative Expenses [Member] Selling, General And Administrative Expenses Service Tax Audit, Amount Outstanding Pending Closure Service Tax Audit Amount Outstanding Pending Closure Remaining balance of service tax pending closure Service tax audit objection received Service Tax Audit Objection Received Service tax demand with show cause notice Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period 1 Options granted vesting period Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Exercise Price Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Exercise Price Exercise price Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Expected dividend yield Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term 1 Expected life Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Expected volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Risk free interest rate Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period Fair Value Aggregate fair value of shares vested Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Award Type [Domain] Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price 1 Shares granted exercise price Shares Issued Ending Balance (in shares) Beginning Balance (in shares) Short Term Investments Short term investments Short Term Investments [Member] Short Term Investments Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Nature Of Uncertainty [Domain] Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain] Software Development [Member] Software Development Statement Business Segments [Axis] Business Segments [Axis] Statement Equity Components [Axis] Equity Components [Axis] Statement Geographical [Axis] Geographical [Axis] Statement [Line Items] Statement [Line Items] Statement Of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement Of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement Of Stockholders Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] State Street Bank State Street Bank [Member] State Street Bank State Street Syntel Sourcing (Mauritius) Ltd. [Member] State Street Syntel Sourcing Mauritius Ltd [Member] SSSSML Stock based employee compensation plans [text block] Stock Based Employee Compensation Plans [Text Block] STOCK-BASED EMPLOYEE COMPENSATION PLANS Stockholders Equity Ending Balance Beginning Balance Total shareholders' equity Stockholders Equity [Abstract] SHAREHOLDERS' EQUITY Stock Issued During Period Shares Restricted Stock Award Gross Incentive restricted stock issued Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures Restricted stock activity (in shares) Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures Restricted stock activity Stock Options [Member] Stock Options Summary Of Derivative Instruments By Hedge Designation [Abstract] Derivatives designated as net investment hedges: Supplemental Cash Flow Information [Abstract] Non cash investing and financing activities: Syntel Delaware [Member] Syntel Delaware [Member] Syntel Delaware Syntel Europe Limited [Member] Syntel Europe Limited [Member] Syntel Europe Limited Tax Credit Carryforward Valuation Allowance Valuation allowance Taxes by Nature [Axis] Taxesby Nature [Axis] Taxes by Nature [Axis] Taxes by Nature [Domain] Taxesby Nature [Domain] Taxes by Nature [Domain] Tax Exemption Period [Member] Tax Exemption Period [Member] Tax Exemption Period TeamSourcing Teamsourcing [Member] Teamsourcing Carrying value of deposit held at financial institution for a fixed term that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer. Term Deposits Non Current Non current Term Deposits with Banks Text Block [Abstract] Text Block [Abstract] Three Units In Mumbai Member] Three Units In Mumbai [Member] Three Units In Mumbai Time Deposits Term deposits outstanding Time Deposits At Carrying Value Term deposits Title Of Individual With Relationship To Entity [Domain] Title of Individual with Relationship to Entity [Domain] Trading Symbol Trading Symbol Two Thousand Two And Three To Two Thousand Four And Five [Member] Two Thousand Two And Three To Two Thousand Four And Five [Member] 2002-03 to 2004-05 Units Exempt From Corporate Income Tax [Axis] Units Exempt From Corporate Income Tax [Axis] Units Exempt From Corporate Income Tax [Axis] Units Exempt From Corporate Income Tax [Domain] Units Exempt From Corporate Income Tax [Domain] Units Exempt From Corporate Income Tax [Domain] Unrecognized Tax Benefits Liability for unrecognized tax benefits Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued Accrued interest and penalties related to unrecognized tax benefits Unrecognized Tax Benefits [Member] Unrecognized Tax Benefits [Member] Unrecognized Tax Benefits Unrecognized Tax Benefits Other Unrecognized Tax Benefits Other Disputed and potential disputed service tax amount Unrecognized Tax Benefits Potential Tax Disputes Unrecognized Tax Benefits Potential Tax Disputes Unrecognized tax benefits, potential tax disputes Unrecognized tax benefits, refund orders received Unrecognized Tax Benefits Refund Orders Received Rejection of Service tax refund Unrecognized Tax Benefits Tax Disputes Unrecognized Tax Benefits Tax Disputes Unrecognized tax benefits, tax disputes Use Of Estimates [Text Block] Use Of Estimates [Text Block] USE OF ESTIMATES Vacation Pay[Text Block] Vacation Pay [Text Block] VACATION PAY Weighted Average Exchange Rate Weighted Average Exchange Rate Weighted exchange Weighted exchange rate Weighted Average Number Of Diluted Shares Outstanding Diluted Diluted earnings per share, Weighted Average Shares Weighted Average Number Of Shares Outstanding [Abstract] Weighted average common shares outstanding: Weighted Average Number Of Shares Outstanding Basic Basic Basic earnings per share, Weighted Average Shares