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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Unrealized gain (loss) on available for sale securities $ 1,713 $ (1,108)
Unrecognized gains on post-retirement benefits 158 181
Tax effect (393) 195
Accumulated other comprehensive income (loss) $ 1,478 $ (732)