XML 42 R52.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies - Other (Details) - USD ($)
12 Months Ended
Jul. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Summary Of Significant Accounting Policies        
Mortgage loans held for sale   $ 428,000 $ 583,000  
Sustained period of repayment performance for non-accrual TDRs   6 months    
Depreciation methods   straight-line and accelerated methods    
Period of employees highest compensation before retirement   10 years    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   21.00% 21.00% 34.00%
Tax liabilities related to uncertain tax positions   $ 0 $ 0 $ 0
Interest or penalties recognized related to uncertain tax positions   0 $ 0 0
Amounts reclassified from accumulated other comprehensive loss per ASU 2018-02   $ 0   0
Special stock dividend, rate percent 4.00%      
Retained Earnings        
Summary Of Significant Accounting Policies        
Amounts reclassified from accumulated other comprehensive loss per ASU 2018-02       1,218,000
Accumulated Other Comprehensive Loss        
Summary Of Significant Accounting Policies        
Amounts reclassified from accumulated other comprehensive loss per ASU 2018-02       $ (1,218,000)
Buildings and improvements | Minimum        
Summary Of Significant Accounting Policies        
Estimated useful lives   5 years    
Buildings and improvements | Maximum        
Summary Of Significant Accounting Policies        
Estimated useful lives   40 years    
Furniture and Fixtures | Minimum        
Summary Of Significant Accounting Policies        
Estimated useful lives   3 years    
Furniture and Fixtures | Maximum        
Summary Of Significant Accounting Policies        
Estimated useful lives   15 years    
Federal Home Loan Bank of Des Moines        
Summary Of Significant Accounting Policies        
Investment in capital stock of the Federal Home Loan Bank of total assets   0.12%    
Investment in capital stock of Federal Home Loan Bank required percentage of advances   4.00%