CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 161,508	$ 214,888
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	62,711	43,267
Operating lease right-of-use assets amortization expense	20,581	18,773
Bad debt expense/(recovery)	169	(2,397)
Deferred taxes	(6,090)	(12,011)
Stock-based compensation expense	87,014	80,475
Other	5,596	12,563
Changes in assets and liabilities:
Trade receivables and contract assets	(116,352)	(63,001)
Prepaid and other assets	4,210	(3,659)
Accounts payable	(243)	(2,354)
Accrued expenses and other liabilities	(60,706)	(44,703)
Operating lease liabilities	(21,573)	(19,380)
Income taxes payable	(59,465)	(35,514)
Net cash provided by operating activities	77,360	186,947
Cash flows from investing activities:
Purchases of property and equipment	(19,160)	(11,453)
Purchases of short-term investments	(2,038)	(1,213)
Proceeds from short-term investments	0	1,509
Acquisition of business, net of cash acquired (Note 3)	(3,346)	(56,706)
Purchases of non-marketable securities	(360)	(6,909)
Proceeds from non-marketable securities	2,913	0
Other investing activities, net	(1,531)	936
Net cash used in investing activities	(23,522)	(73,836)
Cash flows from financing activities:
Proceeds from issuance of stock under the employee incentive programs	34,579	32,476
Payments of withholding taxes related to net share settlements of restricted stock units	(23,338)	(30,600)
Repayment of debt	(1,088)	(1,124)
Repurchase of common stock	(356,531)	(335,070)
Payment of contingent consideration for previously acquired business	(4,746)	(4,750)
Purchase of subsidiary shares from noncontrolling interest	(1,358)	0
Other financing activities, net	(1,087)	907
Net cash used in financing activities	(353,569)	(338,161)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	55,820	(26,447)
Net decrease in cash, cash equivalents and restricted cash	(243,911)	(251,497)
Cash, cash equivalents and restricted cash, beginning of period	1,290,392	2,043,108
Cash, cash equivalents and restricted cash, end of period	$ 1,046,481	$ 1,791,611