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Fair Value Measurements and Fair Values of Financial Instruments (Quantitative Information about Level 3 Fair Value Measurements) (Details)
Dec. 31, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
item
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other Real Estate Owned | $ $ 414,000 $ 1,623,000
Significant Unobservable Inputs (Level 3) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Loans | $ [1],[2]   4,001,000
Other Real Estate Owned | $ [1],[2]   $ 1,623,000
Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Loans, Range 0 0
Other Real Estate Owned, Range 0 0
Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Loans, Range 10 10
Other Real Estate Owned, Range 10 10
[1] Appraisals may be adjusted by management for qualitative factors such as age of appraisal, expected condition of property, economic conditions, and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.
[2] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.