CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 75,807	$ 155,402	$ 222,806	$ 480,527
Cost of sales	80,404	113,252	263,703	340,365
Gross (loss) profit	(4,597)	42,150	(40,897)	140,162
Selling, general and administrative expenses	14,609	18,087	45,902	53,960
Start-up costs				811
Loss (gain) on disposal or impairment of assets	15	5,055	(148)	4,864
Operating (loss) profit	(19,221)	19,008	(86,651)	80,527
Other (expense) income, net	(64)	48	(199)	342
(Loss) income before income taxes	(19,285)	19,056	(86,850)	80,869
Income tax (benefit) expense	(5,387)	5,312	(27,346)	25,680
Net (loss) income	$ (13,898)	$ 13,744	$ (59,504)	$ 55,189
(Loss) earnings per share:
Basic	$ (0.60)	$ 0.60	$ (2.59)	$ 2.39
Diluted	(0.60)	0.60	(2.59)	2.39
Other information:
Dividends declared per common share (See Note 4)	$ 0.20	$ 0.66	$ 0.63	$ 1.26