Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 100,023	$ 89,382
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	17,831	16,465
Gain on sale of operations, net	(99)	(135)
Bad debt expense, net of recoveries	805	1,263
Adjustment to contingent earnout liability	1,445	1,478
Stock-based compensation expense	6,619	6,428
Deferred income taxes	4,571	4,688
Other, net	100	202
Changes in assets and liabilities, net of acquisitions and divestitures:
Accounts receivable, net	(111,792)	(138,658)
Other assets	(11,594)	(1,696)
Accounts payable	45,350	57,837
Income taxes payable	11,913	11,252
Accrued personnel costs	(40,893)	(11,176)
Other liabilities	5,450	(8,822)
Net cash provided by operating activities	29,729	28,508
Cash flows from investing activities:
Business acquisitions and purchases of client lists, net of cash acquired	(48,630)	(72,469)
Purchases of client fund investments	0	(18,271)
Proceeds from the sales and maturities of client fund investments	3,190	8,505
Proceeds from sales of divested operations	245	190
Change in funds held for clients	305	(2,468)
Additions to property and equipment	(11,726)	(3,640)
Other, net	(9,001)	(1,603)
Net cash used in investing activities	(65,617)	(89,756)
Cash flows from financing activities:
Proceeds from bank debt	661,800	447,300
Payment of bank debt	(516,900)	(336,600)
Payment for acquisition of treasury stock	(48,764)	(34,354)
Indirect repurchase of shares for minimum tax withholding	(8,224)	(7,289)
Changes in client funds obligations	(40,398)	29,014
Proceeds from exercise of stock options	4,252	3,896
Payment of contingent consideration for acquisitions and client lists	(29,973)	(8,240)
Other, net	0	(2,072)
Net cash provided by financing activities	21,793	91,655
Net (decrease) increase in cash, cash equivalents and restricted cash	(14,095)	30,407
Cash, cash equivalents and restricted cash at beginning of year	160,145	150,474
Cash, cash equivalents and restricted cash at end of period	146,050	180,881
Reconciliation of cash, cash equivalents and restricted cash to the Condensed Consolidated Balance Sheets:
Cash and cash equivalents	3,692	3,881
Restricted cash	52,314	42,188
Cash equivalents included in funds held for clients	90,044	134,812
Total cash, cash equivalents and restricted cash	$ 146,050	$ 180,881