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Restructuring Charges (Summary of Changes in Restructuring Reserve) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Restructuring and Related Activities [Abstract]    
Beginning Balance $ 445 $ 1,245
Restructuring charges 0 0
Cash payments (22) (77)
Charges against assets 0 (6)
Ending balance $ 423 $ 1,162