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Income Tax, Components of Deferred Tax Asset and Liability (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred Tax Assets, Gross [Abstract]      
Deferred Tax Asset, Allowance For Loan Loss $ 1,240 $ 1,411  
Deferred Tax Asset, Bonus 192 183  
Deferred Tax Asset Right Of Use Liability 178 204  
Deferred Tax Assets, Other 77 91  
Deferred Tax Assets, Gross 1,687 1,889  
Deferred Tax Liabilities [Abstract]      
Deferred Tax Liabilities, Property, Plant and Equipment 200 199  
Deferred Tax Liabilities, Unrealized Gains on Available-for-Sale Securities, Gross 298 2,548  
Deferred Tax Liabilities, Originated Mortgage Servicing Rights 329 334  
Deferred Tax Liabilities, Right Of Use Asset 173 198  
Deferred Tax Liabilities, New Market Tax Credit 89 0  
Deferred Tax Liabilities, Other 163 147  
Deferred Income Tax Liabilities, Gross, Total 1,252 3,426  
Deferred Tax Assets (Liabilities), Net $ 435 $ (1,537) $ (9)