CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net earnings (loss)	$ 2,014	$ (9,184)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Stock-based compensation expense	2,034	25,575
Amortization of intangibles	5,074	12,980
Provision for credit losses	19,118	17,807
Depreciation	15,969	12,138
Deferred income taxes	(10,268)	(8,348)
Impairment of long-lived assets	1,854	0
Revenue reserves	2,910	2,140
Other adjustments, net	2,235	1,076
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Accounts receivable	(34,638)	(21,226)
Other assets	573	3,043
Accounts payable and other liabilities	4,539	21,008
Income taxes payable and receivable	938	(873)
Deferred revenue	2,993	(230)
Net cash provided by operating activities	15,345	55,906
Cash flows from investing activities:
Capital expenditures	(18,743)	(13,236)
Proceeds from maturities of marketable debt securities	50,000
Net proceeds from the sale of a business	0	767
Net cash provided by (used in) investing activities	31,257	(12,469)
Cash flows from financing activities:
Principal payments on Term Loan	(6,875)	(3,438)
Purchase of treasury stock	(4,916)	(38,512)
Withholding taxes paid on behalf of employees on net settled stock-based awards	(48,168)	(3,222)
Purchase of noncontrolling interests	(22,938)	(3,165)
Net cash used in financing activities	(82,897)	(48,337)
Total cash used	(36,295)	(4,900)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	384	(1,327)
Net decrease in cash and cash equivalents and restricted cash	(35,911)	(6,227)
Cash and cash equivalents and restricted cash at beginning of period	813,561	391,478
Cash and cash equivalents and restricted cash at end of period	$ 777,650	$ 385,251