CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 20,224	$ 30,211	$ 12,014
Depreciation	11,406	11,234	12,062
Deferred income taxes	6,045	10,476	6,553
Defined benefit pension credit	(6,858)	(24,388)	(4,654)
OPEB credit	(6,075)	(5,799)	(5,258)
OPEB payments	(1,284)	(1,139)	(1,303)
Other, net	1,073	502	148
Change in assets and liabilities:
Accounts receivable	11,984	(12,407)	(5,575)
Inventories	(11,882)	(17,966)	(10,051)
Accounts payable	(5,910)	7,640	1,117
Accrued liabilities	(1,487)	6,502	3,553
Income taxes payable to or receivable from Contran	(4,439)	3,769
Income taxes payable to or receivable from tax authorities	(771)	2,742	2,177
Other, net	130	(1,114)	1,152
Net cash provided by operating activities	12,156	10,263	11,935
Cash flows from investing activities:
Capital expenditures	(14,096)	(16,479)	(14,937)
Other, net	61	75	109
Net cash used in investing activities	(14,035)	(16,404)	(14,828)
Cash flows from financing activities:
Revolving credit facility, net	773	5,890	15,194
Principal payments on other notes payable and long-term debt	(1)	(4)	(11,927)
Other, net	1,107	255	(374)
Net cash provided by financing activities	1,879	6,141	2,893
Cash and cash equivalents:
Net change from operations, investing and financing activities
Balance at beginning of year
Balance at end of year
Supplemental disclosures:
Interest, net of amounts capitalized	1,083	1,088	1,631
Income taxes paid (refunded), net	$ 11,107	$ 4,411	$ (85)