Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net income	$ 217,952	$ 184,239
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	21,140	17,624
Stock-based compensation	32,631	17,747
Provision for credit losses on accounts and other receivables	25,478	2,477
Amortization of deferred financing costs and discounts	1,968	1,471
Amortization of intangible assets and premium on receivables	55,662	48,105
Deferred income taxes	1,900	4,497
Investment loss (gain)	152	(9)
Other	113	57
Changes in operating assets and liabilities (net of acquisitions/dispositions):
Accounts and other receivables	(818,969)	(468,593)
Prepaid expenses and other current assets	(23,261)	59,269
Other assets	(8,940)	4,609
Accounts payable, accrued expenses and customer deposits	381,921	206,357
Net cash (used in) provided by operating activities	(112,253)	77,850
Investing activities
Acquisitions, net of cash acquired	(35,864)	(43,727)
Purchases of property and equipment	(31,387)	(19,526)
Proceeds from disposal of investment	0	9
Net cash used in investing activities	(67,251)	(63,244)
Financing activities
Proceeds from issuance of common stock	8,810	27,345
Repurchase of common stock	(422,736)	(162,041)
Borrowings on securitization facility, net	318,000	215,000
Deferred financing costs	(337)	0
Principal payments on notes payable	(45,063)	(41,188)
Borrowings from revolver	490,000	330,000
Payments on revolver	(400,000)	(353,851)
Borrowings (payments) on swing line of credit, net	1,505	(33,311)
Other	0	1,467
Net cash used in financing activities	(49,821)	(16,579)
Effect of foreign currency exchange rates on cash	68,068	(43,124)
Net decrease in cash and cash equivalents and restricted cash	(161,257)	(45,097)
Cash and cash equivalents and restricted cash, beginning of period	2,250,695	1,476,619
Cash and cash equivalents and restricted cash, end of period	2,089,438	1,431,522
Supplemental cash flow information
Cash paid for interest	33,967	27,732
Cash paid for income taxes	$ 72,296	$ 32,041