CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 131,761	$ 133,705
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	28,593	26,965
Gain on sale of operations, net	(4,953)	(176)
Bad debt expense, net of recoveries	2,099	1,011
Adjustment to contingent earnout liability	6,340	2,071
Stock-based compensation expense	7,431	9,721
Deferred income taxes	4,842	6,689
Other, net	434	(1,156)
Changes in assets and liabilities, net of acquisitions and divestitures:
Accounts receivable, net	(99,967)	(121,249)
Other assets	(7,202)	(8,222)
Accounts payable	3,032	(1,057)
Income taxes payable	10,385	14,414
Accrued personnel costs	(17,055)	(12,593)
Other liabilities	2,428	7,131
Net cash provided by operating activities	68,168	57,254
Cash flows from investing activities:
Business acquisitions and purchases of client lists, net of cash acquired	(22,930)	(53,110)
Purchases of client fund investments	(16,100)	(2,472)
Proceeds from the sales and maturities of client fund investments	15,156	6,815
Proceeds from sales of divested operations	9,883	1,696
Change in funds held for clients	902	875
Additions to property and equipment	(9,650)	(19,035)
Other, net	(2,172)	(11,399)
Net cash used in investing activities	(24,911)	(76,630)
Cash flows from financing activities:
Proceeds from bank debt	818,500	975,300
Payment of bank debt	(793,600)	(846,300)
Payment for acquisition of treasury stock	0	(57,736)
Indirect repurchase of shares for minimum tax withholding	(11,444)	(8,448)
Changes in client funds obligations	(47,576)	(49,557)
Proceeds from exercise of stock options	0	8,375
Payment of contingent consideration for acquisitions and client lists	(50,861)	(40,076)
Other, net	(241)	0
Net cash used in financing activities	(85,222)	(18,442)
Net decrease in cash, cash equivalents and restricted cash	(41,965)	(37,818)
Cash, cash equivalents and restricted cash at beginning of year	157,148	160,145
Cash, cash equivalents and restricted cash at end of period	115,183	122,327
Reconciliation of cash, cash equivalents and restricted cash to the Condensed Consolidated Balance Sheets:
Cash and cash equivalents	1,076	1,415
Restricted cash	43,104	38,229
Cash equivalents included in funds held for clients	71,003	82,683
Total cash, cash equivalents and restricted cash	$ 115,183	$ 122,327