CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Sales	$ 489,609	$ 627,298
Miscellaneous income	1,734	4,265
Total revenues	491,343	631,563
Costs and expenses:
Cost of sales (exclusive of depreciation and depletion)	420,934	431,534
Depreciation and depletion	81,190	66,493
Selling, general and administrative	30,674	36,247
Postretirement benefits	14,725	13,213
Restructuring charges	7,440
Total costs and expenses	554,963	547,487
Operating income (loss)	(63,620)	84,076
Interest expense	(52,618)	(28,067)
Interest income	650	277
Other income (loss)	105	(6,993)
Income (loss) before income tax expense	(115,483)	49,293
Income tax expense (benefit)	(66,039)	8,677
Net income (loss)	$ (49,444)	$ 40,616
Net income (loss) per share:
Basic (in dollars per share)	$ (0.79)	$ 0.65
Diluted (in dollars per share)	$ (0.79)	$ 0.65
Dividends per share (in dollars per share)	$ 0.125	$ 0.125