Annual report pursuant to Section 13 and 15(d)

Income Taxes Income Taxes - Additional Information (Details)

v3.10.0.1
Income Taxes Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Tax Credit Carryforward [Line Items]      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 5,727 $ 51,177 $ 6,661
Domestic Tax Authority [Member]      
Tax Credit Carryforward [Line Items]      
Operating Loss Carryforwards 261,400    
Tax Credit Carryforward, Amount 37,800    
Federal Alternative Minimum Tax Credit Carryforward 700    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 11,300 $ 51,200  
State and Local Jurisdiction [Member]      
Tax Credit Carryforward [Line Items]      
Operating Loss Carryforwards 95,500    
Tax Credit Carryforward, Amount 83,100    
Foreign Tax Authority [Member]      
Tax Credit Carryforward [Line Items]      
Operating Loss Carryforwards 13,600    
Tax Credit Carryforward, Amount 5,600    
Deferred Tax Assets, Other Tax Carryforwards $ 23,500