CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 25,353	$ 4,044
Receivables, net	27,004	66,356
Refundable income taxes	1,960	2,146
Inventories	36,140	56,240
Spare parts	10,230	29,304
Other current assets	2,351	8,766
Assets of discontinued operations - current	10,565
Total current assets	113,603	166,856
Property, plant, and equipment, net	293,882	460,656
Deferred income taxes	51,733	19,496
Other assets	54,065	53,707
Total Assets	513,283	700,715
Current liabilities:
Accounts payable	25,779	50,072
Deferred income taxes	11,034
Accrued and other liabilities	26,041	48,114
Liabilities of discontinued operations - current	1,423	833
Total current liabilities	64,277	99,019
Long-term debt	150,000	196,200
Post-retirement benefits	48,831	91,591
Pension	87,230	81,411
Other noncurrent liabilities	21,035	26,993
Noncurrent liabilities of discontinued operations	1,700
Total liabilities	373,073	495,214
Stockholders' equity	140,210	205,501
Total Liabilities and Stockholders' Equity	$ 513,283	$ 700,715