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Income Taxes (Details 2) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
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 $ 2,367 $ (1,529) $ (740) $ (12,074) $ (8,289) $ (17,003) $ (2,269) $ (25,292) $ 98 $ (37,366) $ 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%