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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Statement of Comprehensive Income [Abstract] |  |
SECURITIES: Unrealized (losses) gains arising during the period, income taxes | $ (1,738) | $ 907
SECURITIES: Reclassification adjustment for net gains included in net income, income taxes | 0 | 0
PENSION: Amortization of pension net loss, transition liability, and prior service cost, income taxes | $ 69 | $ 38

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