Consolidated Statements of Income - Unaudited Consolidated Statements of Income - Unaudited [Abstract] Revenues Operating expenses Operating expenses [Abstract] Cost of services Selling, general and administrative Total operating expenses Operating income Other income Income before income taxes Provision for income taxes Net income Basic earnings per common share (in Dollars per share) Diluted earnings per common share (in Dollars per share) Basic weighted average common shares (in Shares) Diluted weighted average common shares (in Shares) Consolidated Statements of Comprehensive Income - Unaudited Consolidated Statements of Comprehensive Income - Unaudited [Abstract] Net income Other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax [Abstract] Net unrealized gain (loss) on cash flow hedges Foreign currency translation adjustments Other comprehensive income (loss) Comprehensive income Consolidated Balance Sheets - Unaudited Consolidated Balance Sheets - Unaudited [Abstract] ASSETS ASSETS [Abstract] Cash and cash equivalents Investments Accounts receivable, net of reserves of $1,705 at November 30, 2012 and $1,830 at August 31, 2012 Prepaid taxes Deferred taxes Prepaid expenses and other current assets Total current assets Property, equipment and leasehold improvements, at cost Less accumulated depreciation and amortization Property, equipment and leasehold improvements, net Goodwill (in Dollars) Intangible assets, net Deferred taxes Other assets TOTAL ASSETS LIABILITIES LIABILITIES [Abstract] Accounts payable and accrued expenses Accrued compensation Deferred fees Taxes payable Dividends payable Total current liabilities Deferred taxes Taxes payable Deferred rent and other non-current liabilities TOTAL LIABILITIES Commitments and contingencies (See Note 16) STOCKHOLDERS’ EQUITY STOCKHOLDERS’ EQUITY [Abstract] Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued Common stock, $.01 par value, 150,000,000 shares authorized, 45,963,473 and 45,599,754 shares issued; 44,342,402 and 44,279,214 shares outstanding at November 30, 2012 and August 31, 2012, respectively Additional paid-in capital Treasury stock, at cost: 1,621,071 and 1,320,540 shares at November 30, 2012 and August 31, 2012, respectively Retained earnings Accumulated other comprehensive loss TOTAL STOCKHOLDERS’ EQUITY TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Accounts receivable, reserves (in Dollars) Preferred stock par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Common stock, par value (in Dollars per share) Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Treasury stock shares Consolidated Statements of Cash Flows - Unaudited Consolidated Statements of Cash Flows - Unaudited [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES CASH FLOWS FROM OPERATING ACTIVITIES [Abstract] Adjustments to reconcile net income to net cash provided by operating activities Adjustments to reconcile net income to net cash provided by operating activities [Abstract] Depreciation and amortization Stock-based compensation expense Deferred income taxes Gain on sale of assets Tax benefits from share-based payment arrangements Changes in assets and liabilities Changes in assets and liabilities [Abstract] Accounts receivable, net of reserves Accounts payable and accrued expenses Accrued compensation Deferred fees Taxes payable, net of prepaid taxes Prepaid expenses and other assets Deferred rent and other non-current liabilities Other working capital accounts, net Net cash provided by operating activities CASH FLOWS FROM INVESTING ACTIVITIES CASH FLOWS FROM INVESTING ACTIVITIES [Abstract] Purchases of investments Proceeds from sales of investments Purchases of property, equipment and leasehold improvements, net of proceeds from dispositions Net cash used in investing activities CASH FLOWS FROM FINANCING ACTIVITIES CASH FLOWS FROM FINANCING ACTIVITIES [Abstract] Dividend payments Repurchase of common stock Proceeds from employee stock plans Tax benefits from share-based payment arrangements Net cash used in financing activities Effect of exchange rate changes on cash and cash equivalents Net increase in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Note 1. Organization and Nature of Business Nature of Operations [Text Block] Note 2. Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Note 3. Recent Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Note 4. Fair Value Measures Fair Value, Measurement Inputs, Disclosure [Text Block] Note 5. Cash, Cash Equivalents and Investments Cash and Cash Equivalents Disclosure [Text Block] Note 6. Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Note 7. Segment Information Segment Reporting Disclosure [Text Block] Note 8. Business Combinations Business Combination Disclosure [Text Block] Note 9. Goodwill Goodwill Disclosure [Text Block] Note 10. Intangible Assets Intangible Assets Disclosure [Text Block] Note 11. Common Stock and Earnings Per Share Earnings Per Share [Text Block] Note 12. Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Note 13. Employee Stock Option and Retirement Plans Employee Stock Option And Retirement Plans Employee Stock Option And Retirement Plans [Text Block] Note 14. Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Note 15. Income Taxes Income Tax Disclosure [Text Block] Note 16. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Note 17. Subsequent Event Subsequent Events [Text Block] Fair Value, Disclosure Item Amounts [Domain] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block] Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Business Acquisition, Acquiree [Domain] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Purchase Price Allocation [Table Text Block] Schedule of Goodwill [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Stock by Class [Table Text Block] Schedule of Weighted Average Number of Shares [Table Text Block] Dividend Declaration and Payment Details DividendDeclarationAndPaymentDetailsTableTextBlock Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Award Type [Domain] Schedule of Share Based Compensation Vesting Percentage and Related Expenses Schedule of Share Based Awards Available For Grant. Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block] ScheduleOfShareBasedCompensationVestingPercentageAndRelatedExpensesTableTextBlock Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Share Based Awards Available For Grant [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule Of Deferred Tax Assets Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] ScheduleOfDeferredTaxAssetsTableTextBlock Summary of Income Tax Contingencies [Table Text Block] Summary of Income Tax Examinations [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Assets and Liabilities Measured At Fair Value Assets and Liabilities Measured At Fair Value [Abstract] Fair Value, Measurements, Fair Value Hierarchy [Domain] Assets Assets [Abstract] Cash equivalents fair value disclosure Corporate money market funds (1) Certificates of deposit (2) Total assets measured at fair value Liabilities Liabilities [Abstract] Derivative instruments (3) Total liabilities measured at fair value Assets Assets [Abstract]0 Liabilities Liabilities [Abstract]0 Assets and Liabilities Measured at Fair Value Assets and Liabilities Measured at Fair Value [Abstract] Cash and cash equivalents Investments (short-term) Accounts payable and accrued liabilities (derivative liabilities) Cash and Cash Equivalents Cash and Cash Equivalents [Abstract] CashAndCashEquivalents_ [Domain] Cash on hand Corporate money market funds Total cash and cash equivalents