Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net income	$ 356,961	$ 309,601
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	25,706	22,941
Stock-based compensation	50,025	44,387
Provision for losses on accounts receivable	24,512	18,287
Amortization of deferred financing costs and discounts	5,568	5,295
Amortization of intangible assets	112,455	120,055
Amortization of premium on receivables	3,687	2,439
Deferred income taxes	(23,566)	(27,640)
Equity method investment loss (income)	(2,247)	13,926
Other non-cash operating income	(690)	(2,476)
Changes in operating assets and liabilities (net of acquisitions):
Restricted cash	(28,744)	5,697
Accounts receivable	(527,255)	(71,310)
Prepaid expenses and other current assets	(1,291)	2,724
Other assets	(9,115)	(3,297)
Excess tax benefits related to stock-based compensation	0	(24,455)
Accounts payable, accrued expenses and customer deposits	418,280	108,278
Net cash provided by operating activities	404,286	524,452
Investing activities
Acquisitions, net of cash acquired	(1,331,079)	(9,239)
Purchases of property and equipment	(41,877)	(29,526)
Other	1,411	(7,782)
Net cash used in investing activities	(1,371,545)	(46,547)
Financing activities
Excess tax benefits related to stock-based compensation	0	24,455
Proceeds from issuance of common stock	18,620	13,977
Repurchase of common stock	(35,492)	0
Borrowings (payments) on securitization facility, net	42,000	(10,000)
Deferred financing costs paid	(2,272)	0
Borrowings from notes payable	600,000	0
Principal payments on notes payable	(85,125)	(77,625)
Borrowings from revolver – A Facility	1,105,107	0
Payments on revolver – A Facility	(670,940)	(411,818)
Borrowings (payments) on swing line of credit, net	5,188	(601)
Payment of contingent consideration	0	(40,310)
Other	(673)	(342)
Net cash provided by (used in) financing activities	976,413	(502,264)
Effect of foreign currency exchange rates on cash	(50,871)	(30,320)
Net decrease in cash and cash equivalents	(41,717)	(54,679)
Cash and cash equivalents, beginning of period	447,152	477,069
Cash and cash equivalents, end of period	405,435	422,390
Supplemental cash flow information
Cash paid for interest	48,525	55,959
Cash paid for income taxes	$ 79,599	$ 47,339