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Fair Value Measurements and Fair Values of Financial Instruments (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impaired loans $ 11,817,000 $ 4,229,000 $ 2,784,000  
Total Loans Receivable 3,033,784,000 3,317,402,000 3,082,418,000  
Allowance for credit losses 34,789,000 33,608,000 $ 32,373,000 $ 37,119,000
Fair Value, Recurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Liabilities 0 0    
Impaired Loans [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Losses (recoveries) on impaired loans 7,600,000 1,400,000    
(Level 3) Significant Unobservable Inputs [Member] | Impaired Loans [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impaired loans 31,200,000 27,800,000    
Valuation allowance $ 11,800,000 $ 4,200,000