Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Accounts receivable, net	$ 73,253	$ 58,976
Inventories	98,497	88,567
Deferred income taxes	12,194	12,194
Prepaid expenses and other	1,478	2,033
Total current assets	185,422	161,770
Property, plant and equipment:
Land	1,468	1,468
Buildings and improvements	64,166	64,959
Machinery and equipment	350,032	348,789
Construction in progress	1,837	5,607
Total property, plant and equipment	417,503	420,823
Less accumulated depreciation	326,086	327,820
Net property, plant and equipment	91,417	93,003
Other assets:
Pension asset	78,420	71,719
Other, net	1,436	1,455
Total other assets	79,856	73,174
Total assets	356,695	327,947
Current liabilities:
Current maturities of long-term debt	52,480	33,631
Accounts payable	15,811	14,334
Accrued OPEB cost	1,220	1,220
Income taxes payable to Contran	2,261	3,769
Income taxes payable to tax authorities	595	713
Other accrued liabilities	26,740	29,361
Total current liabilities	99,107	83,028
Noncurrent liabilities:
Long-term debt	995	983
Accrued pension cost	21,716	21,664
Accrued OPEB cost	50,694	50,470
Deferred income taxes	20,985	17,783
Other	2,220	1,891
Total noncurrent liabilities	96,610	92,791
Stockholders' equity:
Common stock	121	121
Additional paid-in capital	99,024	99,024
Accumulated other comprehensive loss	(180,508)	(182,093)
Retained earnings	242,341	235,076
Total stockholders' equity	160,978	152,128
Total liabilities and stockholders' equity	356,695	327,947
Commitments and contingencies (Note 5)