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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of Comprehensive Income [Abstract]      
Net income $ 9,759 $ 9,001 $ 7,786
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, $0 and ($1) for the years ended December 31, 2019, 2018, and 2017, respectively 0 0 (2)
Unrealized gain (loss) on available for sale securities, net of reclassification adjustments, net of deferred income tax of $807, ($495), and $147 for the years ended December 31, 2019, 2018 and 2017, respectively 3,035 (1,863) 285
Total other comprehensive income (loss) 3,035 (1,863) 283
Total comprehensive income $ 12,794 $ 7,138 $ 8,069