Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Net income	$ 184,239	$ 147,060
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,624	15,788
Stock-based compensation	17,747	14,175
Provision for losses on accounts and other receivables	2,477	117,746
Amortization of deferred financing costs and discounts	1,471	1,354
Amortization of intangible assets and premium on receivables	48,105	48,688
Deferred income taxes	7,992	(7,322)
Investment (gain) loss	(9)	2,371
Other	57	(38)
Changes in operating assets and liabilities (net of acquisitions/dispositions):
Accounts and other receivables	(468,593)	156,052
Prepaid expenses and other current assets	59,269	(45,149)
Other assets	4,609	(3,046)
Accounts payable, accrued expenses and customer deposits	202,862	(27,646)
Net cash provided by operating activities	77,850	420,033
Investing activities
Acquisitions, net of cash acquired	(43,727)	(467)
Purchases of property and equipment	(19,526)	(18,257)
Proceeds from disposal of a business	9	0
Net cash used in investing activities	(63,244)	(18,724)
Financing activities
Proceeds from issuance of common stock	27,345	73,274
Repurchase of common stock	(162,041)	(530,237)
Borrowings (payments) on securitization facility, net	215,000	(151,973)
Principal payments on notes payable	(41,188)	(51,722)
Borrowings from revolver	330,000	573,500
Payments on revolver	(353,851)	(204,460)
Payments on swing line of credit, net	33,311	22,741
Other	1,467	(92)
Net cash used in financing activities	(16,579)	(314,451)
Effect of foreign currency exchange rates on cash	(43,124)	(209,859)
Net decrease in cash and cash equivalents and restricted cash	(45,097)	(123,001)
Cash and cash equivalents and restricted cash, beginning of period	1,476,619	1,675,237
Cash and cash equivalents and restricted cash, end of period	1,431,522	1,552,236
Supplemental cash flow information
Cash paid for interest	27,732	40,394
Cash paid for income taxes	$ 32,041	$ 32,939