Consolidated Condensed Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues	$ 497,421	$ 539,447	$ 476,169
Costs and expenses:
Cost of goods sold	382,252	423,353	338,350
Selling, general and administrative expenses	40,549	39,347	47,382
Environmental remediation charge	1,200	4,096	739
Asset impairment charge	1,180	0	2,994
Total costs and expenses	425,181	466,796	389,465
Earnings from continuing operations before interest and taxes	72,240	72,651	86,704
Interest expense, net	(27,829)	(27,780)	(21,921)
Earnings from continuing operations before taxes	44,411	44,871	64,783
Income tax (provision) benefit	(4,145)	(4,596)	16,648
Earnings from continuing operations	40,266	40,275	81,431
Discontinued Operations
Gain (loss) from discontinued operations (including gain on disposal of $-, $922 and $-)	0	182	(6,788)
Income tax benefit (provision)	0	(63)	2,685
Discontinued operations, net of tax	0	119	(4,103)
Net earnings	$ 40,266	$ 40,394	$ 77,328
Earnings per common share from continuing operations:
Basic (in dollars per share)	$ 1.00	$ 1.01	$ 2.05
Diluted (in dollars per share)	$ 1.00	$ 1.00	$ 2.04
Loss per common share from discontinued operations:
Basic (in dollars per share)	$ 0.00	$ 0.00	$ (0.11)
Diluted (in dollars per share)	$ 0.00	$ 0.00	$ (0.11)
Net earnings per common share:
Basic (in dollars per share)	$ 1.00	$ 1.01	$ 1.94
Diluted (in dollars per share)	$ 1.00	$ 1.00	$ 1.93