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Income Taxes (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Summary of provision for (benefit from) income taxes in effective tax rates      
Income taxes at U.S. federal statutory rate of 35% $ (37,165) $ (15,813) $ (7,311)
Net state income taxes 2,383 (5,253) 937
Noncontrolling interest (2,904) (11,166) (12,685)
Unrecognized tax benefits 698 4,063 416
Valuation allowances and write off of tax attributes 88,088 0 0
Other 2,089 103 803
Provision for (benefit from) income taxes $ 53,189 $ (28,066) $ (17,840)
Effective income tax rate (as a percent) (50.10%) 62.10% 85.40%
U.S. federal statutory rate (as a percent) 35.00% 35.00% 35.00%