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Equity and Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Equity and Accumulated Other Comprehensive Loss [Abstract]        
Foreign currency translation, Beginning balance $ (88,795) $ (91,472)    
Foreign currency translation, Other comprehensive income (loss) before reclassifications (10,778) (17,119)    
Foreign currency translation, Net other comprehensive income (loss), net of tax (10,778) (17,119)    
Foreign currency translation, Ending balance (99,573) (108,591)    
Unrealized gain (loss) on on derivatives, Beginning balance (840)      
Unrealized gain (loss) on on derivatives, Other comprehensive income (loss) before reclassifications (90) (3,781)    
Unrealized gain (loss) on on derivatives, Amounts reclassified from accumulated other comprehensive loss (39) 126    
Unrealized gain (loss) on on derivatives, Net other comprehensive income (loss), net of tax [1] (129) (3,655)    
Unrealized gain (loss) on on derivatives, Ending balance (969) (3,655)    
Total, Other comprehensive income (loss) before reclassifications (10,868) (20,900)    
Total, Amounts reclassified from accumulated other comprehensive loss (39) 126    
Total, Net other comprehensive income (loss), net of tax (10,907) (20,774)    
Accumulated other comprehensive income (loss), net of tax, total $ (100,542) $ (112,246) $ (89,635) $ (91,472)
[1] Net of tax benefit of $(35) and $(972) for the three months ended March 31, 2021 and 2020, respectively.