Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 19,594	$ 4,044
Receivables, net	29,106	66,356
Refundable income taxes	1,927	2,146
Inventories	35,718	56,240
Spare parts	10,607	29,304
Other current assets	2,243	8,766
Assets of discontinued operations	8,587
Total current assets	107,782	166,856
Property, plant, and equipment - net	298,964	460,656
Deferred income taxes	20,470	19,496
Other assets	54,347	53,707
Total Assets	481,563	700,715
Current liabilities:
Accounts payable	29,900	50,072
Deferred income taxes	10,118
Accrued and other liabilities	31,965	48,114
Liabilities of discontinued operations	1,894	833
Total current liabilities	73,877	99,019
Long-term debt	150,000	196,200
Post-retirement benefits	30,247	91,591
Pension	38,838	81,411
Other noncurrent liabilities	19,470	26,993
Other noncurrent liabilities of discontinued operations	989
Total liabilities	313,421	495,214
Commitments and contingencies
STOCKHOLDERS' EQUITY
Preferred stock, no par value (500,000 shares authorized; no shares issued)
Common stock, no par value (100,000,000 shares authorized; issued 60,122,812 shares in 2013 and 2012)	178,342	178,005
Retained earnings	151,485	254,732
Accumulated other comprehensive loss	(27,220)	(91,096)
Treasury stock, at cost (10,667,058 and 10,799,891 shares in 2013 and 2012, respectively)	(134,465)	(136,140)
Total stockholders' equity	168,142	205,501
Total Liabilities and Stockholders' Equity	$ 481,563	$ 700,715