CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 222,325	$ 108,323
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	45,550	47,250
Operating lease right-of-use assets amortization expense	20,628	26,037
Bad debt expense	2,031	11,748
Deferred taxes	4,603	(29,405)
Stock-based compensation expense	71,689	35,005
Unrealized (gain)/loss on derivative instruments	(7,904)	32,013
Impairment charges	659	21,002
Other	(447)	75,433
Changes in assets and liabilities:
Trade receivables and contract assets	11,984	(183,143)
Prepaid and other assets	8,980	(3,350)
Accounts payable	1,784	725
Accrued expenses and other liabilities	(128,498)	(62,153)
Operating lease liabilities	(23,251)	(29,015)
Income taxes payable	(53,747)	(24,803)
Net cash provided by operating activities	176,386	25,667
Cash flows from investing activities:
Purchases of property and equipment	(14,796)	(41,426)
Purchases of short-term investments	(10,865)	(60,000)
Acquisition of business, net of cash acquired (Note 3)	0	(10,621)
Purchases of non-marketable securities	(1,906)	0
Other investing activities, net	(7,943)	(11,041)
Net cash used in investing activities	(35,510)	(123,088)
Cash flows from financing activities:
Proceeds from issuance of stock under the employee incentive programs	25,631	22,165
Payments of withholding taxes related to net share settlements of restricted stock units	(25,691)	(20,796)
Proceeds from debt	173	3,227
Repayment of debt	(1,964)	(10,756)
Repurchase of common stock	(49,947)	0
Payment of contingent consideration for previously acquired business	(8,684)	(207)
Purchase of subsidiary shares from noncontrolling interest	(1,972)	(2,146)
Other financing activities, net	(377)	(2,121)
Net cash used in financing activities	(62,831)	(10,634)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	17,096	(45,661)
Net increase/(decrease) in cash, cash equivalents and restricted cash	95,141	(153,716)
Cash, cash equivalents and restricted cash, beginning of period	1,683,636	1,449,347
Cash, cash equivalents and restricted cash, end of period	$ 1,778,777	$ 1,295,631