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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other comprehensive loss, net of tax:      
Unrealized holding losses on securities arising during the current period, tax $ (355) $ (570) $ (1,218)
Reclassification adjustment due to losses realized on sales of securities, tax 6 6 0
Officers' retirement plan equity adjustments, tax 82 (236) (16)
Directors' retirement plan equity adjustments, tax 10 (7) (2)
Total other comprehensive loss, tax $ (257) $ (807) $ (1,236)