Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net service revenues	$ 951,120	$ 864,499	$ 764,775
Cost of service revenues	651,381	594,651	538,538
Gross profit	299,739	269,848	226,237
General and administrative expenses	216,942	189,418	169,679
Depreciation and amortization	14,060	14,494	12,051
Total operating expenses	231,002	203,912	181,730
Operating income	68,737	65,936	44,507
Interest income	(341)	(268)	(624)
Interest expense	8,907	5,806	3,189
Total interest expense, net	8,566	5,538	2,565
Income before income taxes	60,171	60,398	41,942
Income tax expense	14,146	15,272	8,809
Net income	$ 46,025	$ 45,126	$ 33,133
Basic income per share
Basic income per share	$ 2.90	$ 2.87	$ 2.12
Diluted income per share
Diluted income per share	$ 2.84	$ 2.81	$ 2.08
Weighted average number of common shares and potential common shares outstanding:
Basic	15,861	15,737	15,596
Diluted	16,181	16,064	15,956