Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities
Net income	$ 42,079	$ 32,335
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	3,119	2,725
Stock-based compensation	3,834	4,141
Provision for losses on accounts receivable	4,957	3,847
Amortization of deferred financing costs	510	466
Amortization of intangible assets	7,276	4,600
Amortization of premium on receivables	816	816
Deferred income taxes	(17)	(340)
Changes in operating assets and liabilities (net of acquisitions):
Restricted cash	(1,447)	(3,978)
Accounts receivable	(183,976)	(132,635)
Prepaid expenses and other current assets	(1,889)	(3,035)
Other assets	(37,821)	(1,114)
Excess tax benefits related to stock-based compensation	(8,883)	(787)
Accounts payable, accrued expenses and customer deposits	57,508	84,165
Net cash used in operating activities	(113,934)	(8,794)
Investing activities
Acquisitions, net of cash acquired	(10)
Purchases of property and equipment	(3,563)	(2,594)
Net cash used in investing activities	(3,573)	(2,594)
Financing activities
Excess tax benefits related to stock-based compensation	8,883	787
Borrowings on securitization facility, net	61,000	10,000
Deferred financing costs paid	(681)	(550)
Proceeds from issuance of common stock	7,737	484
Principal payments on notes payable	(3,750)	(1,729)
Borrowings from revolver and swing line of credit, net	38,960
Net cash provided by financing activities	112,149	8,992
Effect of foreign currency exchange rates on cash	7,318	7,371
Net increase in cash and cash equivalents	1,960	4,975
Cash and cash equivalents, beginning of period	285,159	114,804
Cash and cash equivalents, end of period	287,119	119,779
Supplemental cash flow information
Cash paid for interest	4,028	4,182
Cash paid for income taxes	$ 6,004	$ 3,103