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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Income taxes disclosures        
Loss before income taxes $ (31,285) $ (31,068) $ (40,472) $ (46,073)
Income tax expense (benefit) (12,897) $ 1,014 (23,179) $ 1,542
Federal        
Income taxes disclosures        
Income tax expense (benefit) (15,400)   (19,500)  
Tax reconciliation disclosures        
Current income tax expense (benefit) for net income (losses) (16,400)   (21,300)  
Deferred income tax expense related to amortization on indefinite-lived intangible assets 1,000   1,900  
Foreign        
Income taxes disclosures        
Income tax expense (benefit) 2,500   (3,700)  
Tax reconciliation disclosures        
Current foreign income tax expense (benefit) for net income (losses) 2,500   $ 2,700  
Increase (decrease) in unrecognized tax benefits (6,300)      
Reversal of tax liability related to uncertain tax position (4,900)      
Deferred tax benefit related to foreign net operating losses $ (1,400)