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Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes
Effective income tax rate (as a percent)	48.00%	38.50%	3.40%
U.S. federal statutory rate (as a percent)	35.00%
Summary of provision for (benefit from) income taxes in effective tax rates
Income taxes at U.S. federal statutory rate of 35%	$ 61,756	$ (41,615)	$ (120,152)
Net state income taxes	3,318	(2,836)	(538)
Foreign taxes	28,470	14,607	5,085
Noncontrolling interest	(12,685)	(1,772)	(1,103)
Foreign tax credits	(14,659)	(9,925)	(11,431)
Unrecognized tax benefits	2,889	(166)	(741)
Valuation allowances	21,486	14,649	62,318
Goodwill impairment			53,988
Proceeds from sale of joint venture assets	(6,650)	(18,019)
Other	794	(678)	857
Provision for (benefit from) income taxes	$ 84,719	$ (45,755)	$ (11,717)

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