Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income	$ 52,730	$ 48,590
Adjustments to reconcile net income to net cash used for operating activities:
Fair value change of fuel price derivatives	6,943	287
Stock-based compensation	4,574	2,976
Depreciation and amortization	23,139	12,067
Deferred taxes	4,750	15,428
Provision for credit losses	11,787	8,762
Loss on disposal of property and equipment	592
Changes in operating assets and liabilities, net of effects of acquisition:
Accounts receivable	(409,223)	(190,626)
Other assets	(8,627)	1,171
Accounts payable	196,591	93,653
Accrued expenses	2,099	(2,975)
Income taxes	10,441	(2,283)
Other liabilities	(536)	(29)
Amounts due under tax receivable agreement	(4,040)	(3,905)
Net cash used for operating activities	(108,780)	(16,884)
Cash flows from investing activities
Purchases of property and equipment	(12,417)	(13,455)
Purchases of available-for-sale securities	(1,797)	(77)
Maturities of available-for-sale securities	585	1,198
Acquisition of ReD - adjustment	3,734
Acquisition of rapid!, net of earn out	(8,081)
Net cash used for investing activities	(17,976)	(12,334)
Cash flows from financing activities
Excess tax benefits from share-based payment arrangements	3,659	981
Repurchase of share-based awards to satisfy tax withholdings	(2,387)	(1,762)
Proceeds from stock option exercises	2,675	1,970
Net increase in deposits	238,650	96,278
Net decrease in borrowed federal funds	(50,084)	(46,905)
Loan origination fee paid for 2011 revolving line-of-credit facility	(6,184)
Net repayments on 2007 revolving line-of-credit facility	(332,300)
Repayments on term loan	(75,000)
Net borrowings in 2011 revolving line-of-credit facility	189,000	(36,800)
Borrowings on 2011 term note agreement	200,000
Repayment of 2011 term note agreement	(2,500)
Purchase of shares of treasury stock		(10,464)
Net cash provided by financing activities	165,529	3,298
Effect of exchange rate changes on cash and cash equivalents	194	(176)
Net change in cash and cash equivalents	38,967	(26,096)
Cash and cash equivalents, beginning of period	18,045	39,304
Cash and cash equivalents, end of period	57,012	13,208
Supplemental cash flow information
Interest paid	7,135	1,317
Income taxes paid	10,714	15,031
Conversion of preferred stock shares and accrued preferred dividends to common stock shares		10,004
Significant non-cash transaction
Acquisition of rapid! - estimated earn out	$ 10,000