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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Unrealized Gains and (Losses) on Available- for-Sales Securities, Opening Balance | $ 10,818 | $ (8,041) | $ (4,796) | $ 784
Unrealized Gains and (Losses) on Available- for-Sales Securities, Other comprehensive income before reclassification | 3,935 | (3,616) | 19,636 | (12,519)
Unrealized Gains and (Losses) on Available- for-Sales Securities, Amounts reclassified from accumulated other comprehensive income (loss) | (6) | 0 | (94) | 6
Unrealized Gains and (Losses) on Available- for-Sales Securities, Net current period other comprehensive income | 3,929 | (3,616) | 19,542 | (12,513)
Unrealized Gains and (Losses) on Available- for-Sales Securities, Ending Balance |  | (11,657) |  | (11,657)
Defined Benefit Pension Gains (Losses), Opening Balance | (1,318) | (1,669) | (1,395) | (1,454)
Defined Benefit Pension Gains (Losses), Other comprehensive income before reclassification | 0 | 0 | 0 | 0
Defined Benefit Pension Gains (Losses), Amounts reclassified from accumulated other comprehensive income (loss) | 38 | 50 | (116) | (148)
Net of tax amount | 38 | 50 | 116 | 148
Defined Benefit Pension Gains (Losses), Ending Balance |  | (1,619) |  | (1,619)
Total, Opening Balance | 9,500 | (9,710) | (6,191) | (670)
Total, Other comprehensive income (loss) before reclassification | 3,935 | (3,616) | (19,636) | 12,519
Total, Amounts reclassified from accumulated other comprehensive income (loss) | 32 | 50 | 22 | 154
Total other comprehensive income (loss), net of tax | 3,967 | (3,566) | 19,658 | (12,365)
Total, Ending Balance | $ 13,467 | $ (13,276) | $ 13,467 | (13,276)
Accounting Standards Update 2018-02 |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax |  |  |  | 140
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  |  |  | (313)
Other Comprehensive Income Loss, Adjustment, Net of Tax |  |  |  | (173)
Accounting Standards Update 2016-01 |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax |  |  |  | (68)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  |  |  | 0
Other Comprehensive Income Loss, Adjustment, Net of Tax |  |  |  | $ (68)

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