XML 97 R83.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Taxes      
Increase (decrease) in valuation allowance $ 2,200 $ 14,600 $ 277,300
Deferred tax impact of Tax Cuts and Jobs Act of 2017   196,751  
Reconciliation of the beginning and ending amount of unrecognized tax benefits      
Balance at beginning of period 18,022 10,798  
Additions related to prior periods tax positions 2,098 2,571  
Reductions related to prior periods tax positions   (821)  
Additions related to current period tax positions 2,466 5,555  
Reductions due to lapse of applicable statute of limitations (130) (81)  
Currency translation adjustment (61)    
Balance at end of period 22,395 18,022 10,798
Interest and penalties as a component of income tax expense $ 100 $ 300 $ 300