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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassified Out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Net gains (losses) on sales of investment securities |  |  |  |  |  |  |  |  | $ 150 | $ (201) | $ 36
Income tax benefit (expense) | $ (7,605) | $ (6,814) | $ (5,887) | $ (5,452) | $ (3,772) | $ (2,200) | $ (2,967) | $ (2,821) | (25,758) | (11,760) | (19,605)
Net of tax |  |  |  |  |  |  |  |  | (41,387) | 16,140 | 37,660
Total reclassifications, net of tax | $ 22,327 | $ 20,815 | $ 18,714 | $ 18,038 | $ 12,171 | $ 6,859 | $ 9,917 | $ 8,326 | 79,894 | 37,273 | 58,322
Amount Reclassified from AOCI |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Total reclassifications, net of tax |  |  |  |  |  |  |  |  | (649) | (1,020) | (818)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | (1,036) | (1,160) | (1,117)
Reclassification from AOCI, Current Period, Tax |  |  |  |  |  |  |  |  | (291) | (310) | (299)
Net of tax |  |  |  |  |  |  |  |  | (745) | (850) | (818)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] | Amount Reclassified from AOCI |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | (1,036) | (1,160) | (1,117)
Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | (18) | (18) | (18)
Reclassification from AOCI, Current Period, Tax |  |  |  |  |  |  |  |  | (4) | (5) | (5)
Net of tax |  |  |  |  |  |  |  |  | (14) | (13) | (13)
Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member] | Amount Reclassified from AOCI |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | (18) | (18) | (18)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | 0 | (14) | (18)
Reclassification from AOCI, Current Period, Tax |  |  |  |  |  |  |  |  | 0 | (4) | (5)
Net of tax |  |  |  |  |  |  |  |  | 0 | (10) | (13)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] | Amount Reclassified from AOCI |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | 0 | (14) | (18)
Investment Securities |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Net of tax |  |  |  |  |  |  |  |  | 110 | (147) | 26
Investment Securities | Amount Reclassified from AOCI |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Net gains (losses) on sales of investment securities |  |  |  |  |  |  |  |  | 150 | (201) | 36
Income tax benefit (expense) |  |  |  |  |  |  |  |  | (40) | 54 | (10)
Net of tax |  |  |  |  |  |  |  |  | 110 | (147) | 26
Defined Benefit Plans |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Net of tax |  |  |  |  |  |  |  |  | (759) | (873) | (844)
Defined Benefit Plans | Amount Reclassified from AOCI |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  |  |  |  |  |  | (1,054) | (1,192) | (1,153)
Reclassification from AOCI, Current Period, Tax |  |  |  |  |  |  |  |  | (295) | (319) | (309)
Net of tax |  |  |  |  |  |  |  |  | $ (759) | $ (873) | $ (844)

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