Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 2,162,084	$ 2,235,959	$ 2,333,512
Costs and expenses:
Cost of sales	1,610,139	1,670,271	1,724,606
Selling, general and administrative	317,257	329,060	371,264
Amortization of Intangible Assets	13,806	12,624	12,624
Goodwill, Impairment Loss	7,585	0	0
Total costs and expenses	1,948,787	2,011,955	2,108,494
Gain from litigation settlement, net (Note 6)	0	0	490,085
Earnings (loss) from operations	213,297	224,004	715,103
Other expenses and income:
Interest expense	28,666	35,696	64,904
Interest income	(205)	(372)	(653)
Gains (Losses) on Extinguishment of Debt	0	(16,318)	(23,873)
Other income, net	(30)	(7,382)	(5,676)
Total other expenses (income), net	28,431	44,260	82,448
Earnings (loss) before income taxes	184,866	179,744	632,655
Income tax expense (Note 7)	65,881	66,314	247,250
Net earnings	$ 118,985	$ 113,430	$ 385,405
Net earnings per common share, basic (Note 8)	$ 2.96	$ 2.43	$ 7.84
Net earnings per common share, diluted (Note 8)	$ 2.84	$ 2.33	$ 7.42
Weighted-average common shares outstanding, basic (Note 8)	40,167	46,684	49,140
Weighted-average common shares outstanding, diluted (Note 8)	41,947	48,777	51,957