CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 101,234	$ 197,308
Adjustments to reconcile net income to net cash provided by operating activities:
Allowance for credit losses	3,800	2,481
Depreciation	37,893	38,713
Amortization of cloud computing implementation costs	23,234	27,537
Amortization of intangible assets	1,350	913
Realized and unrealized gains from investments held in employee deferred compensation trusts	(77,430)	(80,634)
Stock-based compensation	45,153	48,115
Deferred income taxes	26,604	(9,782)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(43,910)	(25,946)
Capitalized cloud computing implementation costs	(20,835)	(22,879)
Accounts payable and accrued expenses	(23,014)	5,266
Accrued payroll and benefit costs	5,753	(9,869)
Employee deferred compensation plan obligations	72,901	91,177
Income taxes payable	(7,744)	(4,688)
Other assets and liabilities, net	(7,557)	(2,076)
Net cash flows provided by operating activities	137,432	255,636
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(41,408)	(42,012)
Investments in employee deferred compensation trusts	(57,806)	(50,220)
Proceeds from employee deferred compensation trust redemptions	47,315	34,391
Payments for acquisitions, net of cash acquired	(10,722)	(264)
Net cash flows used in investing activities	(62,621)	(58,105)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchases of common stock	(92,069)	(195,548)
Dividends paid	(179,549)	(166,269)
Net cash flows used in financing activities	(271,618)	(361,817)
Effect of exchange rate fluctuations	24,513	3,012
Change in cash and cash equivalents	(172,294)	(161,274)
Cash and cash equivalents at beginning of period	537,583	731,740
Cash and cash equivalents at end of period	365,289	570,466
Non-cash items:
Fund exchanges within employee deferred compensation trusts	137,458	72,190
Contingent consideration related to acquisitions	$ 2,684	$ 0