UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue	$ 389,190	$ 436,516	$ 795,187	$ 853,483
Direct costs	278,924	305,444	570,945	598,525
Gross profit	110,266	131,072	224,242	254,958
Selling, general and administrative expenses	82,993	96,147	172,332	191,196
Depreciation and amortization	1,340	1,076	2,574	2,169
Income from operations	25,933	33,849	49,336	61,593
Other expense (income), net	313	(2,672)	1,358	(1,239)
Income from operations, before income taxes	25,620	36,521	47,978	62,832
Income tax expense	7,046	9,605	13,194	16,735
Net income	18,574	26,916	34,784	46,097
Other comprehensive income, net of tax:
Change in fair value of interest rate swaps	0	(2,917)	0	(615)
Comprehensive income	$ 18,574	$ 23,999	$ 34,784	$ 45,482
Earnings per share – basic (in dollars per share)	$ 0.96	$ 1.33	$ 1.79	$ 2.27
Earnings per share - diluted (in dollars per share)	$ 0.95	$ 1.30	$ 1.77	$ 2.22
Weighted average shares outstanding – basic (in shares)	19,341	20,283	19,398	20,300
Weighted average shares outstanding – diluted (in shares)	19,611	20,718	19,638	20,725