Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Net service revenues	$ 286,922	$ 259,980	$ 567,668	$ 511,579
Cost of service revenues	193,764	177,662	386,333	350,846
Gross profit	93,158	82,318	181,335	160,733
General and administrative expenses	63,576	57,397	124,639	113,757
Depreciation and amortization	3,401	3,382	6,870	6,829
Total operating expenses	66,977	60,779	131,509	120,586
Operating income	26,181	21,539	49,826	40,147
Interest income	(474)	(291)	(897)	(397)
Interest expense	2,114	2,331	4,872	4,792
Total interest expense, net	1,640	2,040	3,975	4,395
Income before income taxes	24,541	19,499	45,851	35,752
Income tax expense	6,462	4,647	11,942	8,225
Net income	$ 18,079	$ 14,852	$ 33,909	$ 27,527
Net income per common share
Basic income per share	$ 1.12	$ 0.93	$ 2.10	$ 1.72
Diluted income per share	$ 1.1	$ 0.91	$ 2.06	$ 1.69
Weighted average number of common shares and potential common shares outstanding:
Basic	16,177	16,002	16,120	15,975
Diluted	16,498	16,283	16,449	16,304