Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net service revenues	$ 226,634	$ 205,302
Cost of service revenues	156,448	144,105
Gross profit	70,186	61,197
General and administrative expenses	53,152	45,426
Depreciation and amortization	3,521	3,601
Total operating expenses	56,673	49,027
Operating income	13,513	12,170
Interest income	(58)	(22)
Interest expense	1,820	1,216
Total interest expense, net	1,762	1,194
Income before income taxes	11,751	10,976
Income tax expense	3,281	2,082
Net income	$ 8,470	$ 8,894
Net income per common share
Basic income per share	$ 0.54	$ 0.57
Diluted income per share	$ 0.53	$ 0.55
Weighted average number of common shares and potential common shares outstanding:
Basic	15,811	15,694
Diluted	16,079	16,069