Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Operating activities:
Net income	$ 222,344	$ 210,939
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	45,431	50,760
Stock-based compensation expense	45,870	50,168
Deferred taxes	1,991	(29,710)
Gain from sale of divested operation	(6,138)	0
Reduction in the carrying amount of operating lease right-of-use assets	14,894	17,736
Amortization and write-off of deferred financing fees	1,298	1,034
Gain on de-designated swaps	0	(165)
Changes in assets and liabilities, net of acquisitions and divestitures:
Fees receivable, net	270,936	211,612
Deferred commissions	21,265	41,131
Prepaid expenses and other current assets	(38,527)	(5,338)
Other assets	(7,930)	(15,568)
Deferred revenues	213,649	131,001
Accounts payable and accrued and other liabilities	(394,044)	(350,088)
Cash provided by operating activities	391,039	313,512
Investing activities:
Additions to property, equipment and leasehold improvements	(20,423)	(25,569)
Proceeds from sale of divested operation, net of cash transferred	104,798	0
Cash provided by (used in) investing activities	84,375	(25,569)
Financing activities:
Proceeds from employee stock purchase plan	8,661	9,736
Payments of deferred financing fees	(1,508)	0
Purchases of treasury stock	(534,637)	(162,672)
Cash used in financing activities	(527,484)	(152,936)
Net (decrease) increase in cash and cash equivalents	(52,070)	135,007
Effects of exchange rates on cash and cash equivalents	(3,505)	22,894
Cash and cash equivalents, beginning of period	1,722,521	1,933,147
Cash and cash equivalents, end of period	$ 1,666,946	$ 2,091,048