Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net service revenues	$ 251,599	$ 226,634
Cost of service revenues	173,184	156,448
Gross profit	78,415	70,186
General and administrative expenses	56,360	53,152
Depreciation and amortization	3,447	3,521
Total operating expenses	59,807	56,673
Operating income	18,608	13,513
Interest income	(106)	(58)
Interest expense	2,461	1,820
Total interest expense, net	2,355	1,762
Income before income taxes	16,253	11,751
Income tax expense	3,578	3,281
Net income	$ 12,675	$ 8,470
Net income per common share
Basic income per share	$ 0.79	$ 0.54
Diluted income per share	$ 0.78	$ 0.53
Weighted average number of common shares and potential common shares outstanding:
Basic	15,949	15,811
Diluted	16,297	16,079