Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income	$ 457,503	$ 356,961
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	35,096	25,706
Stock-based compensation	68,897	50,025
Provision for losses on accounts receivable	35,949	24,512
Amortization of deferred financing costs and discounts	5,411	5,568
Amortization of intangible assets	158,897	112,455
Amortization of premium on receivables	4,738	3,687
Loss on extinguishment of debt	3,296	0
Deferred income taxes	(38,092)	(23,566)
Investment loss (income)	52,497	(2,247)
Gain on disposition of business	(174,984)	0
Other non-cash operating income	(49)	(690)
Changes in operating assets and liabilities (net of acquisitions and dispositions):
Restricted cash	(12,105)	(28,744)
Accounts and other receivables	(440,011)	(527,255)
Prepaid expenses and other current assets	(86,648)	(1,291)
Other assets	(15,378)	(9,115)
Accounts payable, accrued expenses and customer deposits	364,473	418,280
Net cash provided by operating activities	419,490	404,286
Investing activities
Acquisitions, net of cash acquired	(602,298)	(1,331,079)
Purchases of property and equipment	(49,459)	(41,877)
Proceeds from disposal of a business	316,501	0
Other	(6,327)	1,411
Net cash used in investing activities	(341,583)	(1,371,545)
Financing activities
Proceeds from issuance of common stock	20,192	18,620
Repurchase of common stock	(402,392)	(35,492)
Borrowings on securitization facility, net	203,000	42,000
Deferred financing costs paid and debt discount	(11,230)	(2,272)
Proceeds from issuance of notes payable	780,656	600,000
Principal payments on notes payable	(388,656)	(85,125)
Borrowings from revolver – A Facility	845,000	1,105,107
Payments on revolver – A Facility	(804,808)	(670,940)
Borrowings on swing line of credit, net	7,800	5,188
Other	537	(673)
Net cash used in financing activities	250,099	976,413
Effect of foreign currency exchange rates on cash	31,732	(50,871)
Net increase (decrease) in cash and cash equivalents	359,738	(41,717)
Cash and cash equivalents, beginning of period	475,018	447,152
Cash and cash equivalents, end of period	834,756	405,435
Supplemental cash flow information
Cash paid for interest	79,144	48,525
Cash paid for income taxes	$ 257,349	$ 79,599