CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 34,670	$ 33,102
Cost of sales	54,128	56,743
Gross loss	(19,458)	(23,641)
Selling, general and administrative expenses	10,797	11,475
Loss on disposal or impairment of assets	0	948
Operating loss	(30,255)	(36,064)
Other expense:
Interest expense, net	(2,088)	(797)
Other, net	187	76
Nonoperating income (expense), total	(1,901)	(721)
Loss before income taxes	(32,156)	(36,785)
Income tax expense (benefit)	288	(12,101)
Net loss	$ (32,444)	$ (24,684)
Loss per share:
Basic	$ (1.22)	$ (1.07)
Diluted	(1.22)	(1.07)
Other information:
Dividends declared per common share	$ 0	$ 0