Condensed Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net revenues	$ 204,625	$ 150,329	$ 368,887	$ 254,857
Cost of sales	161,728	131,962	313,007	237,315
Gross profit	42,897	18,367	55,880	17,542
Loss on disposition of assets, net			0	(39)
Selling, general and administrative expenses	(18,125)	(13,317)	(32,224)	(30,158)
Income (loss) from operations	24,772	5,050	23,656	(12,655)
Equity in losses of investment	(135)	(152)	(271)	(304)
Net interest expense	(3,599)	(6,639)	(7,495)	(11,865)
Loss on extinguishment of long-term debt	(76)	(397)	(1,181)	(397)
Other income (expense), net	(3,441)	467	(2,516)	(68)
Other income – oil and gas	561	291	3,416	2,893
Income (loss) before income taxes	18,082	(1,380)	15,609	(22,396)
Income tax provision	298	5,023	385	422
Net income (loss)	$ 17,784	$ (6,403)	$ 15,224	$ (22,818)
Earnings (loss) per share of common stock (in dollars per share)
Basic	$ 0.12	$ (0.04)	$ 0.10	$ (0.16)
Diluted	$ 0.12	$ (0.04)	$ 0.10	$ (0.16)
Weighted average common shares outstanding (in shares)
Basic	146,683	145,940	146,668	144,599
Diluted	146,724	145,940	146,668	144,599