Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net revenues	$ 739,818	$ 581,383	$ 487,582
Cost of sales	618,134	519,217	441,066
Gross profit	121,684	62,166	46,516
Goodwill impairment	0	0	(45,107)
Gain (loss) on disposition of assets, net	146	(39)	1,290
Selling, general and administrative expenses	(70,287)	(63,257)	(65,934)
Income (loss) from operations	51,543	(1,130)	(63,235)
Equity in losses of investment	(3,918)	(2,368)	(2,166)
Net interest expense	(13,751)	(18,778)	(31,239)
Loss on extinguishment of long-term debt	(1,183)	(397)	(3,540)
Other income (expense), net	(6,324)	(1,434)	3,510
Other income – oil and gas	4,631	3,735	2,755
Income (loss) before income taxes	30,998	(20,372)	(93,915)
Income tax provision (benefit)	2,400	(50,424)	(12,470)
Net income (loss)	$ 28,598	$ 30,052	$ (81,445)
Earnings (loss) per share of common stock (in dollars per share)
Basic	$ 0.19	$ 0.20	$ (0.73)
Diluted	$ 0.19	$ 0.20	$ (0.73)
Weighted average common shares outstanding (in shares)
Basic	146,702	145,295	111,612
Diluted	146,830	145,300	111,612