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	$ 122,773	$ 76,884
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization expense	24,791	9,468
Bad debt expense, net of recoveries	417	550
Adjustment to contingent earnout liability	502	434
Stock-based compensation expense	5,639	2,638
Deferred income taxes	4,320	2,057
Other, net	1,009	150
Changes in assets and liabilities, net of acquisitions and divestitures:
Accounts receivable, net	(201,258)	(121,551)
Other assets	(8,990)	(2,592)
Accounts payable	11,985	5,743
Income taxes payable	45,626	24,827
Accrued personnel costs	(84,642)	(62,381)
Other liabilities	(10,438)	53
Net cash used in operating activities	(88,266)	(63,720)
Cash flows from investing activities:
Business acquisitions and purchases of client lists, net of cash acquired	0	(21,337)
Purchases of client fund investments	(8,300)	(4,440)
Proceeds from the sales and maturities of client fund investments	8,410	5,450
Proceeds from sales of divested operations	289	0
Change in funds held for clients	(91)	(1,015)
Additions to property and equipment	(5,177)	(5,121)
Other, net	(92)	(2,239)
Net cash used in investing activities	(4,961)	(28,702)
Cash flows from financing activities:
Proceeds from bank debt	485,600	381,200
Payment of bank debt	(358,100)	(255,800)
Indirect repurchase of shares for minimum tax withholding	(7,555)	(11,229)
Changes in client funds obligations	(35,062)	(11,859)
Payment of contingent consideration for acquisitions and client lists	(29,520)	(31,124)
Net cash provided by financing activities	55,363	71,188
Net decrease in cash, cash equivalents and restricted cash	(37,864)	(21,234)
Cash, cash equivalents and restricted cash at beginning of year	187,170	157,148
Cash, cash equivalents and restricted cash at end of period	149,306	135,914
Reconciliation of cash, cash equivalents and restricted cash to the Condensed Consolidated Balance Sheets:
Cash and cash equivalents	8,850	1,402
Restricted cash	40,777	27,740
Cash equivalents included in funds held for clients	99,679	106,772
Total cash, cash equivalents and restricted cash	$ 149,306	$ 135,914