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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]    
Net income $ 11,021 $ 11,172
Other comprehensive income (loss):    
Changes in benefit obligations and plan assets for post retirement benefit plans, net of reclassification adjustments, net of deferred income tax of $0 and ($5) for the years ended December 31, 2021 and 2020, respectively   (25)
Unrealized gain (loss) on available for sale securities, net of reclassification adjustments, net of deferred income tax of ($912) and $484 for the years ended December 31, 2021 and 2020, respectively (3,434) 1,822
Total other comprehensive income (loss) (3,434) 1,797
Total comprehensive income $ 7,587 $ 12,969