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Disclosures of Fair Values of Financial Instruments - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Allowance for Credit Losses $ 1,753,000    
Other real estate owned 4,984,000 $ 2,489,000  
Mortgage servicing rights (MSR) impairment (recovery) 47,000 581,000  
Mortgage Servicing Rights      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Finite-lived intangible assets, net 420,000 516,000 $ 1,444,000
Mortgage servicing rights (MSR) impairment (recovery) (544,000) 273,000  
Fair Value, Nonrecurring      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Carrying amount of loans with a specific allowance 7,987,000 16,789,000  
Fair value of loans with a specific allowance 6,750,000 14,876,000  
Allowance for Credit Losses 1,237,000 1,913,000  
Fair Value, Nonrecurring | Mortgage Servicing Rights      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Indefinite-lived contractual rights 468,000 1,098,000  
Finite-lived intangible assets, net 420,000 516,000  
Fair Value, Nonrecurring | Carrying Amount      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Other real estate owned 4,984,000 2,489,000  
Fair Value, Nonrecurring | Fair Value      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Other real estate owned $ 2,068,000 $ 290,000