Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.8.0.1
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation Allowance [Line Items]        
Federal statutory tax rate (as a percent) 35.00% 35.00% 35.00%  
Net operating loss carryforward $ 1,700      
Net operating loss, gross unrealized excess windfall tax benefits 4,800      
Valuation allowance 43,269 $ 53,199 $ 73,659 $ 50,782
Net operating loss carryforwards that will expire due to annual imitations 2,700      
Cumulative untaxed earnings of foreign subsidiaries 145,300      
Business acquisition, uncertain tax positions 11,000 4,600    
Unrecognized tax benefits that would impact tax rate 10,700 4,500    
Income tax interest and penalties 6,100 1,400 $ 1,000  
Federal        
Valuation Allowance [Line Items]        
Net operating loss carryforwards 152,700 91,900    
State        
Valuation Allowance [Line Items]        
Net operating loss carryforwards 84,900 40,500    
Foreign        
Valuation Allowance [Line Items]        
Net operating loss carryforwards 56,400 44,900    
Domestic Deferred Tax Assets        
Valuation Allowance [Line Items]        
Valuation allowance 33,100 49,500    
Foreign Deferred Tax Assets        
Valuation Allowance [Line Items]        
Valuation allowance $ 10,200 $ 3,700