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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]      
Weighted average remaining lease term 30 years 3 months 18 days    
Weighted average discount rate 4.80%    
Rent expense $ 1.2 $ 1.8 $ 1.7