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Summary of Significant Accounting Policies (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Summary of Significant Accounting Policies      
Foreign currency translation, Beginning balance $ (88,795) $ (91,472)  
Foreign currency translation, Other comprehensive income (loss) before reclassifications (8,408) 2,677  
Other comprehensive income (loss), Foreign currency transaction and translation adjustment, net of tax (8,408) 2,677  
Foreign currency translation, Ending balance (97,203) (88,795) $ (91,472)
Unrealized gain (loss) on on derivatives, Beginning balance (840)    
Unrealized gain (loss) on on derivatives, Other comprehensive income (loss) before reclassifications 859 (2,366)  
Unrealized gain (loss) on on derivatives, Amounts reclassified from accumulated other comprehensive loss 160 1,526  
Unrealized gain (loss) on on derivatives, Net other comprehensive income (loss), net of tax 1,019 (840) (292)
Unrealized gain (loss) on on derivatives, Ending balance 179 (840)  
Accumulated other comprehensive income (loss), Beginning balance (89,635) (91,472)  
Total, Other comprehensive loss before reclassifications (7,549) 311  
Total, Amounts reclassified from accumulated other comprehensive loss 160 1,526  
Total, Net other comprehensive loss, net of tax (7,389) 1,837  
Accumulated other comprehensive income (loss), Ending balance $ (97,024) $ (89,635) $ (91,472)