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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassified out of AOCI) (LOSS) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Net gain on sales of investment securities | $ 0 |  |  | $ 100 |  |  | $ 8,506 | $ 150
Income tax (expenses) benefit | (5,919) |  |  | (6,814) |  |  | (18,141) | (18,153)
Total reclassification adjustments from AOCI for the period, net of tax | 16,715 | $ 17,594 | $ 19,438 | 20,815 | $ 18,714 | $ 18,038 | 53,747 | 57,567
Amortization |  |  |  |  |  |  | 4,295 | 0
Amortization of net actuarial loss |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax | (20) |  |  | (259) |  |  | (284) | (777)
Reclassification from AOCI, tax | 5 |  |  | 70 |  |  | 76 | 222
Net of tax | (15) |  |  | (189) |  |  | (208) | (555)
Amortization of net transition obligation |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax | (5) |  |  | (5) |  |  | (14) | (14)
Reclassification from AOCI, tax | 2 |  |  | 1 |  |  | 4 | 4
Net of tax | (3) |  |  | (4) |  |  | (10) | (10)
Settlement |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax |  |  |  |  |  |  | (4,884) |
Reclassification from AOCI, tax |  |  |  |  |  |  | 1,817 |
Net of tax |  |  |  |  |  |  | (3,067) |
SERPs |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Net of tax | (18) |  |  | (193) |  |  | (3,285) | (565)
Investment Securities |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Net of tax | (1,699) |  |  | 73 |  |  | (3,147) | 110
Amount Reclassified from AOCI |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Total reclassification adjustments from AOCI for the period, net of tax | (1,717) |  |  | (120) |  |  | (6,432) | (455)
Amount Reclassified from AOCI | Amortization of net actuarial loss |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax | (20) |  |  | (259) |  |  | (284) | (777)
Amount Reclassified from AOCI | Amortization of net transition obligation |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax | (5) |  |  | (5) |  |  | (14) | (14)
Amount Reclassified from AOCI | Settlement |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax |  |  |  |  |  |  | (4,884) | 0
Amount Reclassified from AOCI | SERPs |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization of defined benefit plan items, before tax | (25) |  |  | (264) |  |  | (5,182) | (791)
Reclassification from AOCI, tax | 7 |  |  | 71 |  |  | 1,897 | 226
Net of tax | (18) |  |  | (193) |  |  | (3,285) | (565)
Amount Reclassified from AOCI | Investment Securities |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Net gain on sales of investment securities | 0 |  |  | 100 |  |  | 0 | 150
Income tax (expenses) benefit | 0 |  |  | (27) |  |  | 0 | (40)
Total reclassification adjustments from AOCI for the period, net of tax | 0 |  |  | 73 |  |  | 0 | 110
Amount Reclassified from AOCI | Accumulated Net Unrealized Loss on Held To Maturity Securities |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |
Amortization | (2,319) |  |  | 0 |  |  | (4,295) | 0
Less: Amortization of unrealized losses on investment securities transferred to HTM | 620 |  |  | 0 |  |  | 1,148 | 0
Net of tax | $ (1,699) |  |  | $ 0 |  |  | $ (3,147) | $ 0

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