Summary of Significant Accounting Policies Consolidated Statement of Operations Restatement (Details) (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
Revenue	$ 615,555	$ 573,651	$ 1,791,647	$ 1,638,613
Cost of revenues	439,377	391,888	1,240,276	1,125,730
Gross profit	176,178	181,763	551,371	512,883
Operating Income	(497,252)	58,936	(399,078)	140,564
Income before income taxes	(511,040)	41,351	(439,997)	93,352
Income tax (provision) benefit	(6,042)	(13,712)	(15,529)	(15,152)
Net income	(517,082)	27,639	(455,526)	78,200
Earnings Per Share, Basic	$ (12.70)	$ 0.68	$ (11.21)	$ 1.94
Earnings per common share-Diluted	$ (12.70)	$ 0.68	$ (11.21)	$ 1.91
Scenario, Previously Reported [Member]
Revenue		575,968		1,644,708
Cost of revenues		391,761		1,125,282
Gross profit		184,207		519,426
Operating Income		61,380		147,107
Income before income taxes		43,795		99,895
Income tax (provision) benefit		(14,687)		(17,100)
Net income		29,108		82,795
Earnings Per Share, Basic		$ 0.72		$ 2.05
Earnings per common share-Diluted		$ 0.71		$ 2.02
As restated [Member]
Revenue		573,651		1,638,613
Cost of revenues		391,888		1,125,730
Gross profit		181,763		512,883
Operating Income		58,936		140,564
Income before income taxes		41,351		93,352
Income tax (provision) benefit		13,712		(15,152)
Net income		$ 27,639		$ 78,200
Earnings Per Share, Basic		$ 0.68		$ 1.94
Earnings per common share-Diluted		$ 0.68		$ 1.91