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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other comprehensive income (loss), net of tax:      
Unrealized holding gains (losses) on securities arising during the current period, tax $ 2,187 $ (355) $ (570)
Reclassification adjustment due to losses realized on sales of securities, tax 1 6 6
Officers' retirement plan equity adjustments, tax (85) 82 (236)
Directors' retirement plan equity adjustments, tax (17) 10 (7)
Total other comprehensive income (loss), tax $ 2,086 $ (257) $ (807)