CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 17,350	$ 63,701
Adjustments to reconcile net income to net cash used in operating activities:
Allowance for credit losses	1,232	183
Depreciation	13,006	13,004
Amortization of cloud computing implementation costs	8,308	9,183
Amortization of intangible assets	304	304
Realized and unrealized (gains) losses from investments held in employee deferred compensation trusts	22,111	(41,305)
Stock-based compensation	16,705	16,777
Deferred income taxes	3,967	6,602
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(8,305)	(7,042)
Capitalized cloud computing implementation costs	(6,160)	(8,391)
Accounts payable and accrued expenses	(23,244)	(5,756)
Accrued payroll and benefit costs	(48,462)	(83,490)
Employee deferred compensation plan obligations	(29,948)	34,837
Income taxes payable	3,784	10,044
Other assets and liabilities, net	(29,995)	(24,570)
Net cash flows used in operating activities	(59,347)	(15,919)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(12,394)	(11,780)
Investments in employee deferred compensation trusts	(42,420)	(32,643)
Proceeds from employee deferred compensation trust redemptions	22,106	22,389
Net cash flows used in investing activities	(32,708)	(22,034)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchases of common stock	(49,935)	(85,887)
Dividends paid	(61,290)	(57,502)
Net cash flows used in financing activities	(111,225)	(143,389)
Effect of exchange rate fluctuations	8,170	(9,459)
Change in cash and cash equivalents	(195,110)	(190,801)
Cash and cash equivalents at beginning of period	537,583	731,740
Cash and cash equivalents at end of period	342,473	540,939
Non-cash items:
Fund exchanges within employee deferred compensation trusts	53,230	29,073
Contingent consideration related to acquisition	$ 0	$ 350