Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues	$ 528,391	$ 572,406	$ 1,640,622	$ 1,702,358
Costs and expenses:
Cost of sales	395,728	421,510	1,222,345	1,248,664
Selling, general and administrative	80,520	91,800	239,778	275,421
Amortization expense	3,156	3,156	9,467	9,467
Total costs and expenses	479,404	516,466	1,471,590	1,533,552
Gain from litigation settlement, net (Note 6)				490,085
Earnings (loss) from operations	48,987	55,940	169,032	658,891
Other expenses and income:
Interest expense	8,148	14,091	29,649	52,084
Interest income	(54)	(116)	(315)	(510)
Loss on extinguishment of debt (Note 3)			16,318	23,873
Other income, net	(3,856)	(2,120)	(6,168)	(4,471)
Total other expenses (income), net	4,238	11,855	39,484	70,976
Earnings (loss) before income taxes	44,749	44,085	129,548	587,915
Income tax expense (Note 1)	17,255	17,106	50,391	227,303
Net earnings	$ 27,494	$ 26,979	$ 79,157	$ 360,612
Net earnings per common share, basic (Note 7)	$ 0.60	$ 0.55	$ 1.65	$ 7.33
Net earnings per common share, diluted (Note 7)	$ 0.58	$ 0.52	$ 1.58	$ 6.93
Weighted-average common shares outstanding, basic (Note 7)	45,689	49,138	47,831	49,216
Weighted-average common shares outstanding, diluted (Note 7)	47,766	51,995	50,089	52,033