CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenues	$ 239,610	$ 187,697	$ 742,673	$ 501,698
Cost of revenues	209,466	163,538	647,040	450,761
Gross profit	30,144	24,159	95,633	50,937
Selling, general and administrative expenses	18,772	15,266	52,529	50,066
Goodwill and other impairment	0	0	0	29,017
Operating income (loss)	11,372	8,893	43,104	(28,146)
Other (income) expense	(186)	213	(1,127)	749
Interest expense	1,630	5,461	9,489	15,393
Loss on extinguishment of debt	0	0	7,155	0
Income (loss) before provision for income taxes	9,928	3,219	27,587	(44,288)
Provision (benefit) for income taxes	2,417	(959)	6,491	(11,375)
Net income (loss)	$ 7,511	$ 4,178	$ 21,096	$ (32,913)
Earnings (loss) per Common Share:
Basic (in dollars per share)	$ 0.24	$ 0.13	$ 0.67	$ (1.07)
Diluted (in dollars per share)	$ 0.23	$ 0.13	$ 0.64	$ (1.07)
Weighted average shares outstanding:
Basic (in shares)	31,570	30,986	31,432	30,894
Diluted (in shares)	32,706	31,617	32,738	30,894