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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | 12 Months Ended
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Dec. 31, 2022
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS). |
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | 3. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Activity in accumulated other comprehensive income (loss), net of tax, was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Total
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated
​ | ​ | Securities | ​ | Defined | ​ | ​ | ​ | ​ | Other
​ | ​ | Available- | ​ | Benefit | ​ | ​ | ​ | ​ | Comprehensive
​ |  | for-Sale |  | Plans |  | Derivatives |  | Loss
Balance as of January 1, 2021 | ​ | $ | 12,694 | ​ | $ | (6,086) | ​ | $ | (12,532) | ​ | $ | (5,924)
Other comprehensive (loss) income before reclassifications | ​ |  | (19,733) | ​ |  | 5,520 | ​ |  | 14,883 | ​ |  | 670
Amounts reclassified from accumulated other comprehensive loss | ​ |  | (825) | ​ |  | (740) | ​ |  | 638 | ​ |  | (927)
Net other comprehensive (loss) income during the period | ​ |  | (20,558) | ​ |  | 4,780 | ​ |  | 15,521 | ​ |  | (257)
Balance as of December 31, 2021 | ​ | $ | (7,864) | ​ | $ | (1,306) | ​ | $ | 2,989 | ​ | $ | (6,181)
Other comprehensive (loss) income before reclassifications | ​ |  | (95,030) | ​ |  | (1,413) | ​ |  | 9,879 | ​ |  | (86,564)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 2,024 | ​ |  | (2,547) | ​ |  | (1,111) | ​ |  | (1,634)
Net other comprehensive (loss) income during the period | ​ |  | (93,006) | ​ |  | (3,960) | ​ |  | 8,768 | ​ |  | (88,198)
Balance as of December 31, 2022 | ​ | $ | (100,870) | ​ | $ | (5,266) | ​ | $ | 11,757 | ​ | $ | (94,379)
​ The before and after tax amounts allocated to each component of other comprehensive income (loss) are presented in the table below for the periods indicated. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands) | ​ | 2022 |  | 2021 |  | 2020
Change in unrealized gain (loss) on securities: | ​ |  |  | ​ |  |  | ​ |  |
Change in net unrealized gain (loss) during the period | ​ | $ | (138,630) | ​ | $ | (28,865) | ​ | $ | 16,432
Reclassification adjustment for net gains included in net gain on sale of securities and other assets | ​ |  | — | ​ |  | (1,207) | ​ |  | (4,592)
Accretion of net unrealized loss on securities transferred to held-to-maturity | ​ | ​ | 2,953 | ​ | ​ | — | ​ | ​ | —
Net change | ​ |  | (135,677) | ​ |  | (30,072) | ​ |  | 11,840
Tax benefit | ​ |  | (42,671) | ​ |  | (9,514) | ​ |  | 3,767
Net change in unrealized gain (loss) on securities, net of reclassification adjustments and tax | ​ |  | (93,006) | ​ |  | (20,558) | ​ |  | 8,073
Change in pension and other postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Reclassification adjustment for expense included in other expense | ​ |  | (3,715) | ​ |  | (1,092) | ​ |  | (1,272)
Reclassification adjustment for curtailment loss | ​ | ​ | — | ​ | ​ | 1,543 | ​ | ​ | (1,651)
Change in the net actuarial gain | ​ |  | (2,062) | ​ |  | 6,563 | ​ |  | 2,817
Net change | ​ |  | (5,777) | ​ |  | 7,014 | ​ |  | (106)
Tax expense | ​ |  | (1,817) | ​ |  | 2,234 | ​ |  | (44)
Net change in pension and other postretirement obligations | ​ |  | (3,960) | ​ |  | 4,780 | ​ |  | (62)
Change in unrealized gain (loss) on derivatives: | ​ |  |  | ​ |  |  | ​ |  |
Change in net unrealized gain (loss) during the period | ​ |  | 14,412 | ​ |  | 5,277 | ​ |  | (24,449)
Reclassification adjustment for loss included in loss on termination of derivatives | ​ | ​ | — | ​ | ​ | 16,505 | ​ | ​ | 6,596
Reclassification adjustment for expense included in interest expense | ​ |  | (1,621) | ​ |  | 940 | ​ |  | 6,127
Net change | ​ |  | 12,791 | ​ |  | 22,722 | ​ |  | (11,726)
Tax expense | ​ |  | 4,023 | ​ |  | 7,201 | ​ |  | (3,731)
Net change in unrealized gain (loss) on derivatives, net of reclassification adjustments and tax | ​ |  | 8,768 | ​ |  | 15,521 | ​ |  | (7,995)
Other comprehensive (loss) income, net of tax | ​ | $ | (88,198) | ​ | $ | (257) | ​ | $ | 16
​

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI https://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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