Condensed Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net revenues	$ 91,039	$ 189,641
Cost of sales	107,969	154,694
Gross profit (loss)	(16,930)	34,947
Selling, general and administrative expenses	(13,826)	(12,619)
Income (loss) from operations	(30,756)	22,328
Equity in earnings (losses) of investments	(123)	21
Net interest expense	(10,684)	(4,070)
Other income (expense), net	1,880	(1,156)
Other income – oil and gas	2,572	2,926
Income (loss) before income taxes	(37,111)	20,049
Income tax provision (benefit)	(9,288)	407
Net income (loss)	$ (27,823)	$ 19,642
Earnings (loss) per share of common stock (in dollars per share)
Basic	$ (0.26)	$ 0.19
Diluted	$ (0.26)	$ 0.19
Weighted average common shares outstanding (in shares)
Basic	105,908	105,290
Diluted	105,908	105,290