Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities
Net income	$ 109,563	$ 90,382
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,477	8,562
Stock-based compensation	15,622	2,453
Provision for losses on accounts receivable	13,600	15,097
Amortization of deferred financing costs	1,351	1,480
Amortization of intangible assets	13,969	12,749
Amortization of premium on receivables	2,450	2,447
Deferred income taxes	(863)	(3,107)
Loss on early extinguishment of debt	2,669
Changes in operating assets and liabilities (net of acquisitions):
Restricted cash	4,942	2,052
Accounts receivable	(140,491)	(60,301)
Prepaid expenses and other current assets	14,732	(10,969)
Other assets	(81)	(408)
Excess tax benefits related to stock-based compensation	(8,170)
Accounts payable, accrued expenses and customer deposits	32,747	46,415
Net cash provided by operating activities	70,517	106,852
Investing activities
Acquisitions, net of cash acquired	(21,933)	(6,216)
Purchases of property and equipment	(8,408)	(7,074)
Net cash used in investing activities	(30,341)	(13,290)
Financing activities
Excess tax benefits related to stock-based compensation	8,170
Borrowings (payments) on securitization facility, net	6,000	(51,000)
Deferred financing costs paid	(7,839)	(1,067)
Proceeds from issuance of common stock	5,066	480
Principal payments on notes payable	(335,215)	(17,585)
Borrowings from notes payable	300,000
Principal payments on other obligations		(15)
Other	(179)
Net cash used in financing activities	(23,997)	(69,187)
Effect of foreign currency exchange rates on cash	6,301	1,697
Net increase in cash and cash equivalents	22,480	26,072
Cash and cash equivalents, beginning of period	114,804	84,701
Cash and cash equivalents, end of period	137,284	110,773
Supplemental cash flow information
Cash paid for interest	11,213	16,851
Cash paid for income taxes	35,171	40,604
Adoption of new accounting guidance related to asset securitization facility		$ 218,000