Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net sales	$ 133,072	$ 140,973	$ 439,112	$ 431,091
Cost of goods sold	(122,980)	(129,700)	(396,377)	(390,169)
Gross margin	10,092	11,273	42,735	40,922
Other operating income (expense):
Selling expense	(1,457)	(1,775)	(5,749)	(5,573)
General and administrative expense	(2,942)	(3,881)	(13,665)	(11,605)
Defined benefit pension credit	1,346	4,750	5,143	14,250
Other postretirement benefit credit	1,403	1,299	4,557	3,898
Total other operating income (expense)	(1,650)	393	(9,714)	970
Operating income	8,442	11,666	33,021	41,892
Nonoperating income (expense):
Interest expense	(274)	(319)	(967)	(922)
Other income (expense), net	(141)	113	(488)	661
Total nonoperating income (expense)	(415)	(206)	(1,455)	(261)
Income before income taxes	8,027	11,460	31,566	41,631
Provision for income taxes	(3,046)	(4,544)	(11,999)	(17,033)
Net income	$ 4,981	$ 6,916	$ 19,567	$ 24,598
Basic and diluted income per share	$ 0.41	$ 0.57	$ 1.62	$ 2.03
Basic and diluted weighted average shares outstanding	12,102	12,102	12,102	12,102