v3.7.0.1
Income Taxes Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Operating Loss Carryforwards [Line Items]      
U.S. federal statutory tax rate (percent) 35.00% 35.00%  
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate $ 8,352 $ 8,260 $ 7,300
Unrecognized tax benefits, income tax penalties and interest accrued 1,200   $ 900
Federal [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 41,200    
State Tax [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 32,300    
State Tax [Member] | Tax Year 2025 [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 1,100    
State Tax [Member] | Latest Tax Year [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards $ 7,700