Statement of Financial Position [Abstract] CURRENT ASSETS: ASSETS Cash and cash equivalents Cash and cash equivalents beginning of period Cash and cash equivalents end of period Accounts receivable trade, net Accounts receivable trade, net Accounts receivable other Accounts receivable other Prepaid taxes Deferred taxes Deferred Tax Assets Net Current TOTAL CURRENT ASSETS TOTAL CURRENT ASSETS Non-current restricted investments Restricted investments Property and equipment, net Other intangibles, net Goodwill, net Other assets Other Assets Noncurrent TOTAL ASSETS TOTAL ASSETS LIABILITIES AND STOCKHOLDERS' EQUITY CURRENT LIABILITIES: Accounts payable trade, net Accounts payable trade Accounts payable other Accounts payable other Payroll related accrued nexpenses Accrued payroll Accrued Other Accrued other TOTAL CURRENT LIABILITIES TOTAL CURRENT LIABILITIES Non-current liabilities Other Noncurrent Liabilities Deferred taxes STOCKHOLDERS' EQUITY: Preferred stock, $ .01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2010 and 2009 Class A: $.01 par value; 97,337,700 shares authorized and 41,224,792 shares issued in 2010 and 2009; 36,652,858 shares outstanding in 2010 and 37,253,330 shares outstanding in 2009, Class B: $.01 par value; 662,300 shares authorized; 662,296 shares issued and outstanding in 2010 and 2009 Common stock, value Additional paid-in capital Purchase price in excess of predecessor basis, tax benefit Purchase Price In Excess Of Predecessor Basis Purchase price in excess of predecessor basis, net of tax This represents a charge to equity for amounts paid to stockholders in excess of the historical cost of the purchased assets, net of tax benefits. Retained earnings Retained Earnings Accumulated Deficit Accumulated other comprehensive income (loss) Treasury stock; at cost, 3,862,222 shares in 2010 and 3,971,462 shares in 2009 Treasury stock; at cost, 4,571,934 shares in 2010 and 3,971,462 shares in 2009 TOTAL STOCKHOLDERS' EQUITY TOTAL STOCKHOLDERS' EQUITY Beginning of year, balance Ending balance, balance TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, par value Common stock, Class A, par value Common stock, Class B, par value Common stock, Class A, shares authorized Common stock, Class B, shares authorized Common stock, shares authorized Common stock, Class A, shares issued Common stock, Class B, shares issued Common stock, shares issued Common stock, Class A, shares outstanding Common stock, Class B, shares outstanding Balance, shares Balance, shares Common stock, shares outstanding Tax benefit on purchase price of predecessor basis Purchase price in excess of predecessor basis, net of tax benefit of $10,306 This represents a charge to equity for amounts paid to stockholders in excess of the historical cost of the purchased assets, net of tax benefits. Purchase price in excess of predecessor basis, net of tax benefit of $10,306 Accounts receivable Accounts payable Accrued expenses Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Statement [Line Items] Income Statement [Abstract] Revenue Transportation costs Gross margin Gross margin Costs and expenses: Salaries and benefits General and administrative Depreciation and amortization Depreciation And Amortization Total costs and expenses Total costs and expenses Operating income Operating income Other income (expense): Interest expense Interest expense Interest and dividend income Other, net Total other income Total other (expense) income Income before provision for income taxes Income before provision for income taxes Provision for income taxes Net income Net income Basic earnings per common share Diluted earnings per common share Basic weighted average number of shares outstanding Diluted weighted average number of shares outstanding Statement of Stockholders' Equity [Abstract] Statement of Cash Flows [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization Deferred taxes Deferred Income Tax Expense Benefit Compensation expense related to share-based compensation plans Loss (gain) on sale of assets Changes in operating assets and liabilities: Restricted investments Accounts receivable, net Prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Other assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses Increase Decrease In Accrued Liabilities Non-current liabilities Net cash provided by operating activities Net cash provided by operating activities Cash flows from investing activities: Proceeds from sale of equipment Purchases of property and equipment Purchases of property and equipment Net cash used in investing activities Net cash used in investing activities Cash flows from financing activities: Proceeds from stock options exercised Purchase of treasury stock Purchase of treasury stock Excess tax benefits from share-based compensation Net cash used in financing activities Net cash used in financing activities Effect of exchange rate changes on cash and cash equivalents Net increase in cash and cash equivalents Net (decrease) increase in cash and cash equivalents Supplemental disclosures of cash paid for: Interest Income taxes Notes to Financial Statements [Abstract] Interim Financial Statements Earnings Per Share Debt Commitments and Contingencies Fair Value Measurement Restructuring Charges New Pronouncements Comprehensive Income Subsequent Events Common stock Additional Paid-in Capital Purchase Price in Excess of Predecessor Basis, Net of Tax Purchase Price In Excess Of Predecessor Basis Net Of Tax [Member] Retained Earnings Accumulated Other Comprehensive Income (Loss) Treasury Stock Treasury Stock Shares Acquired Purchase of treasury shares Exercise of non-qualified stock options Statement Equity Components [Axis] Equity Component [Domain] Foreign currency translation adjustments Issuance of restricted stock awards, net of forfeitures Tax benefit of share-based compensation plans Treasury shares issued for restricted stock and stock options exercised Stock Issued During Period Shares Treasury Stock Reissued Share-based compensation expense Purchase of treasury shares, value Purchase of treasury shares Issuance of restricted stock and exercise of stock options Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited and the Value stock issued during the period as a result of the exercise of stock options. Prepaid Taxes Temp Prepaid taxes This temporary element is only used for 1st quarter reporting period of 2010. It'll be combine with Prepaid expenses and other current assets element for next reporting period. Treasury stock, shares Class A Class B Document Information [Text Block] Document Type Amendment Flag Amendment Description Document Period End Date Entity [Text Block] Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Entity Information [Line Items] Entities [Table] Prepaid expenses and other current assets Carrying amount as of the balance sheet date of expenditures made, not otherwise specified in the taxonomy, in advance of the timing of recognition of expenses which are expected to be charged against earnings within one year or the normal operating cycle, if longer. This element also includes the aggregate carrying amount, as of the balance sheet date, of current assets not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer) Prepaid Expenses And Other Current Assets Common stock Common Stock Number Of Shares Par Value And Other Disclosures [Abstract] Treasury shares issued for restricted stock and stock options exercised Stock Issued During Period Shares Restricted Stock Award Gross Property Lease Guarantee [Text Block] A guarantee of performance by a third party lessee under terms of a lease agreement. Guarantees