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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Before and After Tax Amounts by Component (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
Change in unrealized gain (loss) on securities: |  |  |  |  |  |  |  |
Change in net unrealized gain (loss) during the period | $ (39,692) |  |  | $ (8,654) |  |  | $ (142,980) | $ (15,222)
Reclassification adjustment for net gains included in net gain on securities and other assets |  |  |  |  |  |  |  | (1,207)
Accretion of net unrealized loss on securities transferred to held to maturity | 1,112 |  |  |  |  |  | 2,111 |
Net change | (38,580) |  |  | (8,654) |  |  | (140,869) | (16,429)
Tax (benefit) expense | (12,133) |  |  | (2,714) |  |  | (44,304) | (5,226)
Net change in unrealized gain (loss) on securities, net of reclassification adjustments and tax | (26,447) |  |  | (5,940) |  |  | (96,565) | (11,203)
Change in pension and other postretirement obligations: |  |  |  |  |  |  |  |
Reclassification adjustment for expense included in other expense | (935) |  |  | (735) |  |  | (2,805) | (1,595)
Reclassification adjustment for curtailment loss |  |  |  |  |  |  |  | 1,543
Change in the net actuarial gain | 997 |  |  | 941 |  |  | 2,992 | 2,470
Net change | 62 |  |  | 206 |  |  | 187 | 2,418
Tax expense | 20 |  |  | 65 |  |  | 59 | 795
Net change in pension and other postretirement obligations | 42 |  |  | 141 |  |  | 128 | 1,623
Change in unrealized gain (loss) on derivatives: |  |  |  |  |  |  |  |
Change in net unrealized gain (loss) during the period | 5,387 |  |  | 225 |  |  | 14,548 | 3,767
Reclassification adjustment for loss included in loss on termination of derivatives |  |  |  |  |  |  |  | 16,505
Reclassification adjustment for expense included in interest expense | (546) |  |  | 38 |  |  | (569) | 902
Net change | 4,841 |  |  | 263 |  |  | 13,979 | 21,174
Tax (benefit) expense | 1,522 |  |  | 82 |  |  | 4,397 | 6,712
Net change in unrealized gain (loss) on derivatives, net of reclassification adjustments and tax | 3,319 |  |  | 181 |  |  | 9,582 | 14,462
Total other comprehensive (loss) income, net of tax | $ (23,086) | $ (20,570) | $ (43,199) | $ (5,618) | $ 4,045 | $ 6,455 | $ (86,855) | $ 4,882

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- Definition Amount, before tax and adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration