CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 423,110	$ 392,525	$ 836,578	$ 771,003
Direct costs	268,905	246,646	527,063	478,728
Operating costs and expenses:
Indirect and selling expenses	114,403	106,178	231,855	216,160
Depreciation and amortization	5,063	4,728	9,901	9,998
Amortization of intangible assets	4,963	3,019	10,280	6,034
Total operating costs and expenses	124,429	113,925	252,036	232,192
Operating income	29,776	31,954	57,479	60,083
Interest expense	(4,103)	(2,612)	(6,800)	(5,295)
Other income (expense)	98	(46)	(271)	(463)
Income before income taxes	25,771	29,296	50,408	54,325
Provision for income taxes	7,374	8,984	14,149	15,662
Net income	$ 18,397	$ 20,312	$ 36,259	$ 38,663
Earnings per Share:
Basic	$ 0.98	$ 1.08	$ 1.93	$ 2.05
Diluted	$ 0.97	$ 1.07	$ 1.91	$ 2.03
Weighted-average Shares:
Basic	18,796	18,843	18,795	18,864
Diluted	18,954	19,022	18,991	19,078
Cash dividends declared per common share	$ 0.14	$ 0.14	$ 0.28	$ 0.28
Other comprehensive (loss) income, net of tax	$ (4,211)	$ 432	$ (1,552)	$ 3,212
Comprehensive income, net of tax	$ 14,186	$ 20,744	$ 34,707	$ 41,875