Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Revenue	$ 363,262	$ 282,719	$ 1,116,936	$ 862,097
Operating expenses	306,017	238,328	886,052	699,233
Gross margin	57,245	44,391	230,884	162,864
Corporate general and administrative expenses	15,893	13,035	43,128	41,334
Legal settlement, net	0	0	0	30,468
Operating income	41,352	31,356	187,756	91,062
Other income (expense):
Interest expense	(2,305)	(1,016)	(5,209)	(2,852)
Gain on sale of operations, net	176	0	311	6,385
Other (expense) income, net	(2,618)	(1,133)	(24,919)	12,029
Total other (expense) income, net	(4,747)	(2,149)	(29,817)	15,562
Income from continuing operations before income tax expense	36,605	29,207	157,939	106,624
Income tax expense	9,131	7,512	41,074	26,100
Income from continuing operations	27,474	21,695	116,865	80,524
Loss from discontinued operations, net of tax	(4)	(4)	(13)	(17)
Net income	$ 27,470	$ 21,691	$ 116,852	$ 80,507
Basic:
Continuing operations (in dollars per share)	$ 0.53	$ 0.41	$ 2.25	$ 1.52
Discontinued operations (in dollars per share)	0	0	0	0
Net income (in dollars per share)	0.53	0.41	2.25	1.52
Diluted:
Continuing operations (in dollars per share)	0.53	0.41	2.22	1.50
Discontinued operations (in dollars per share)	0	0	0	0
Net income (in dollars per share)	$ 0.53	$ 0.41	$ 2.22	$ 1.50
Basic weighted average shares outstanding (in shares)	51,457	52,425	51,827	52,885
Diluted weighted average shares outstanding (in shares)	52,238	53,226	52,720	53,796
Comprehensive income:
Net income	$ 27,470	$ 21,691	$ 116,852	$ 80,507
Other comprehensive income, net of tax	2,179	159	4,584	1,071
Comprehensive income	$ 29,649	$ 21,850	$ 121,436	$ 81,578