XML 105 R90.htm IDEA: XBRL DOCUMENT v3.20.4
Income Taxes - Balances of Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Unrecognized tax benefits $ 33,219 $ 40,878 $ 41,110 $ 36,229
Portion that, if recognized, would reduce tax expense and effective tax rate 30,868 40,695 40,977  
Accrued interest on unrecognized tax benefits 5,204 6,240 5,459  
Accrued penalties on unrecognized tax benefits 14 14 631  
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months 11,900      
Minimum        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months 0 0 0  
Portion that, if recognized, would reduce tax expense and effective tax rate 0 0 0  
Maximum        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months 11,859 6,268 9,541  
Portion that, if recognized, would reduce tax expense and effective tax rate $ 10,217 $ 5,693 $ 8,224