Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation Abstract
Income tax provision (benefit) computed at the U.S. statutory rate									$ 187,959	$ 81,978	$ (1,006,989)
State income tax provision net of federal benefit									8,023	1,329	(136,112)
Valuation allowance									(199,038)	(81,923)	446,148
Tax Effect Of Rate Change									15,457	(2,871)	1,358
Foreign tax rate differential									(16,314)	(3,508)	(5,531)
Other, net									(1,911)	1,379	913
Total income tax (benefit)	$ (3,901)	$ (1,383)	$ (544)	$ 4	$ (6,856)	$ 381	$ 1,491	$ 1,368	$ (5,824)	$ (3,616)	$ (700,213)