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Fair Values of Financial Instruments (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Transfers between fair value hierarchy $ 0 $ 0                
Total Loans Receivable 3,200,549,000 3,354,921,000   $ 3,200,549,000 $ 3,354,921,000   $ 3,317,402,000      
Allowance for credit losses 35,243,000 $ 30,205,000   35,243,000 30,205,000   33,608,000 $ 34,563,000 $ 28,882,000 $ 32,373,000
(Loss) gain on sales of loans 4,851,000   $ (43,000) 4,806,000 $ (6,000) $ (108,000)        
Fair Value, Recurring [Member]                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Liabilities 0     0     0      
Impaired Loans [Member]                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Losses (recoveries) on impaired loans 1,600,000           1,400,000      
Held For Sale [Member]                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
(Loss) gain on sales of loans 4,600,000     4,600,000            
(Level 3) Significant Unobservable Inputs [Member] | Impaired Loans [Member]                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Total Loans Receivable 27,800,000     27,800,000     27,800,000      
Allowance for credit losses $ 6,300,000     $ 6,300,000     $ 4,200,000