Document and Entity Information [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] 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 Accounts receivable, net of allowance Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Total current assets Assets, Current, Total Total current assets Property and equipment (less accumulated depreciation of $179.8 million and $138.1 million at December 31, 2011 and March 31, 2011, respectively) Property, Plant and Equipment, Net Accumulated depreciation on property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Other long-term assets Other Assets, Noncurrent Other long-term assets Total assets Assets, Total Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of long-term debt Long-term Debt, Current Maturities Accounts payable and other accrued expenses Accounts Payable and Accrued Liabilities, Current Accrued compensation and benefits Employee-related Liabilities, Current Other current liabilities Other Liabilities, Current Other current liabilities Total current liabilities Liabilities, Current, Total Total current liabilities Long-term debt, net of current portion Long-term Debt, Excluding Current Maturities Income tax reserve Accrued Income Taxes, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Other long-term liabilities Total liabilities Liabilities, Total Total liabilities Commitments and contingencies (Note 15) Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Common Stock [Member] Common stock, Class A Statement [Line Items] Common Stock, Value, Issued Common stock Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Non-voting common stock, Class B Restricted common stock, Class C Common Class E [Member] Special voting common stock, Class E Common Class E Treasury stock, at cost - 333,775 shares at December 31, 2011 and 0 shares at March 31, 2011 Treasury Stock, Value Treasury stock, shares Treasury Stock, Shares Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Total stockholders' equity Stockholders' Equity Attributable to Parent, Total Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity, Total Total liabilities and stockholders' equity Revenue Sales Revenue, Services, Net Operating costs and expenses: Costs and Expenses [Abstract] Cost of revenue Cost of Services Billable Expenses Billable expenses Billable expenses General and administrative expenses General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization Depreciation and amortization Total operating costs and expenses Costs and Expenses, Total Total operating costs and expenses Operating income Operating Income (Loss) Operating income Interest expense Interest Expense Interest expense Other, net Other Nonoperating Income (Expense) Other, net Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income tax expense (benefit) Income Tax Expense (Benefit) Income tax expense (benefit) Net income Net Income (Loss) Attributable to Parent Net income Earnings per common share (Note 3): Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Basic Diluted Earnings Per Share, Diluted Diluted Actuarial gain related to employee benefits, net of taxes Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net (Gain) Loss Recognized in Net Periodic Benefit Cost, Net of Tax Actuarial gain related to employee benefits, net of taxes Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Gain on sale of state and local transportation business Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Gain on sale of state and local transportation business Transaction Cost on Sale of Business Transaction costs on sale of state and local transportation business Transaction costs on sale of state and local transportation business Amortization of debt issuance costs Amortization of Financing Costs Amortization of original issuance discount on debt Amortization of Debt Discount (Premium) Excess tax benefits from the exercise of stock options Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefits from the exercise of stock options Stock-based compensation expense Share-based Compensation Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Accounts receivable, net Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Other long-term assets Increase (Decrease) in Other Operating Assets Other long-term assets Accrued compensation and benefits Increase (Decrease) in Employee Related Liabilities Accounts payable and other accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Accrued interest Increase (Decrease) in Interest Payable, Net Income tax reserve Increase (Decrease) in Income Taxes Payable Other current liabilities Increase (Decrease) in Other Operating Liabilities Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Other long-term liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments for Escrow Deposits Escrow payments Escrow payments Escrow payments Proceeds from sale of state and local transportation business Proceeds from Divestiture of Businesses Proceeds from sale of state and local transportation business Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net proceeds from issuance of common stock Proceeds from Issuance of Common Stock Repayment of debt Repayments of Debt Repayment of debt Excess tax benefits from the exercise of stock options Excess Tax Benefit from Share-based Compensation, Financing Activities Stock option exercises Proceeds from Stock Options Exercised Repurchases of common stock Payments for Repurchase of Common Stock Repurchases of common stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Cash Payments Abstract Cash paid during the period for: Cash paid during the period for: Interest Interest Paid Interest Income taxes, net Income Taxes Paid, Net Income taxes, net BUSINESS OVERVIEW Nature of Operations [Text Block] Business Overview/Basis of Presentation [Abstract] Business Overview/Basis of Presentation [Abstract] BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] EARNINGS PER SHARE Earnings Per Share [Text Block] GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets [Abstract] Goodwill and Intangible Assets [Abstract] ACCOUNTS RECEIVABLE,NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Accounts Receivable, Net [Abstract] Accounts Receivable, Net [Abstract] Accrued Compensation and Benefits [Text Block] ACCRUED COMPENSATION AND BENEFITS ACCRUED COMPENSATION AND BENEFITS Accrued Compensation and Benefits [Abstract] Accrued Compensation and Benefits [Abstract] ACCRUED COMPENSATION AND BENEFITS DEFERRED PAYMENT OBLIGATION Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block] Deferred Payment Obligation [Abstract] Deferred Payment Obligation [Abstract] DEBT Debt Disclosure [Text Block] Debt [Abstract] Debt [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Income Taxes [Abstract] Income Taxes [Abstract] EMPLOYEE BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefits Plans [Abstract] Employee Benefits Plans [Abstract] STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity [Abstract] Stockholders' Equity [Abstract] STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation [Abstract] Stock-Based Compensation [Abstract] FINANCIALS INSTRUMENTS Financial Instruments Disclosure [Text Block] Financial Instruments [Abstract] Financial Instruments [Abstract] RELATED-PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Related-Party Transactions [Abstract] Related-Party Transactions [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Subsequent Events [Abstract] Subsequent Events [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Filer Category Entity Registrant Name Document Fiscal Period Focus Document Fiscal Year Focus Condensed Consolidated Balance Sheets [Abstract] Condensed Consolidated Statements of Operations [Abstract] Condensed Consolidated Statements of Comprehensive Income [Abstract] Condensed Consolidated Statements of Cash Flows [Abstract]