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Fair Value Measurements (Details 3) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes in the fair value of Level 3 assets measured on a recurring basis    
Total gains or losses (unrealized): included in earnings $ 0 $ 0
U.S. States and political subdivisions securities    
Changes in the fair value of Level 3 assets measured on a recurring basis    
Balance at the beginning of the period 2,152,000 2,292,000
Total gains or losses (realized/unrealized): included in earnings 0 0
Total gains or losses (realized/unrealized): included in other comprehensive income (15,000) 58,000
Purchases 0 3,100,000
Issuances 0 0
Sales 0 0
Settlements 0 0
Maturities (288,000) (3,298,000)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Balance at the end of the period $ 1,849,000 $ 2,152,000