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Fair Value Of Financial Instruments (Narrative) (Details)
3 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 13, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Investment in unconsolidated entity   $ 0 $ 31,294,000    
Transfer of loans from investment in unconsolidated entity upon its dissolution $ 22,900,000 22,926,000      
Transfer to Other Real Estate $ 2,100,000 2,145,000 3,780,000 $ 5,295,000  
Cash and cash equivalents   601,800,000 345,500,000    
Short-term Debt   0 0    
Time deposits   0 0    
Collateral dependent loans     9,600,000    
Impaired Financing Receivable, Recorded Investment   3,983,000 12,755,000    
Specific reserves and other write downs on impaired loans   1,000,000.0 3,200,000    
Troubled debt restructured loans balance   1,479,000 1,631,000    
Troubled debt restructured loans, specific reserve   476,000 467,000    
Other real estate owned   $ 1,530,000 0 $ 0  
Senior Debt [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Interest rate (in hundredths)         4.75%
Minimum [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Estimated selling costs   7.00%      
Maximum [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Estimated selling costs   10.00%      
Measurement Input, Default Rate [Member] | Performing Financial Instruments [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Equity Securities, FV-NI, Measurement Input | item   1      
Measurement Input, Discount Rate [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Equity Securities, FV-NI, Measurement Input | item   3.93      
Fair Value, Measurements, Nonrecurring [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Collateral dependent loans [1]   $ 3,005,000 $ 9,578,000    
Other real estate owned   $ 1,530,000      
[1] The method of valuation approach for the loans evaluated for an allowance for credit losses on an individual loan basis and also for other real estate owned was the market approach based upon appraisals of the underlying collateral by external appraisers, reduced by 7% to 10% for estimated selling costs. Intangible assets are valued based upon internal analyses.