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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | 9 Months Ended
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Sep. 30, 2021
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS). |
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | 4.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
(In thousands) |  | for-Sale |  | Plans |  | Derivatives |  | Income (Loss)
Balance as of January 1, 2021 | ​ | $ | 12,694 | ​ | $ | (6,086) | ​ | $ | (12,532) | ​ | $ | (5,924)
Other comprehensive (loss) income before reclassifications | ​ |  | (10,378) | ​ |  | 2,706 | ​ |  | 13,850 | ​ |  | 6,178
Amounts reclassified from accumulated other comprehensive loss | ​ |  | (826) | ​ |  | (1,082) | ​ |  | 612 | ​ |  | (1,296)
Net other comprehensive (loss) income during the period | ​ |  | (11,204) | ​ |  | 1,624 | ​ |  | 14,462 | ​ |  | 4,882
Balance as of September 30, 2021 | ​ | $ | 1,490 | ​ | $ | (4,462) | ​ | $ | 1,930 | ​ | $ | (1,042)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance as of January 1, 2020 | ​ | $ | 4,621 | ​ | $ | (6,024) | ​ | $ | (4,537) | ​ | $ | (5,940)
Other comprehensive income (loss) before reclassifications | ​ |  | 10,783 | ​ |  | 423 | ​ |  | (17,150) | ​ |  | (5,944)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | (2,302) | ​ |  | 133 | ​ |  | 2,514 | ​ |  | 345
Net other comprehensive income (loss) during the period | ​ |  | 8,481 | ​ |  | 556 | ​ |  | (14,636) | ​ |  | (5,599)
Balance as of September 30, 2020 | ​ | $ | 13,102 | ​ | $ | (5,468) | ​ | $ | (19,173) | ​ | $ | (11,539)
​ 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.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
(In thousands) |  | 2021 |  | 2020 | ​ | 2021 |  | 2020
Change in unrealized holding gain or loss on securities available-for-sale: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Change in net unrealized gain or loss during the period | ​ | $ | (8,654) | ​ | $ | 1,716 | ​ | $ | (15,222) | ​ | $ | 15,769
Reclassification adjustment for net gains included in net gain on securities and other assets | ​ |  | — | ​ |  | (215) | ​ |  | (1,207) | ​ |  | (3,357)
Net change | ​ |  | (8,654) | ​ |  | 1,501 | ​ |  | (16,429) | ​ |  | 12,412
Tax (benefit) expense | ​ |  | (2,714) | ​ |  | 475 | ​ |  | (5,226) | ​ |  | 3,931
Net change in unrealized holding gain or loss on securities available-for-sale, net of reclassification adjustments and tax | ​ |  | (5,940) | ​ |  | 1,026 | ​ |  | (11,203) | ​ |  | 8,481
Change in pension and other postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Reclassification adjustment for expense included in other expense | ​ |  | (735) | ​ |  | 4 | ​ |  | (1,595) | ​ |  | 194
Reclassification adjustment for curtailment loss | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,543 | ​ | ​ | —
Change in the net actuarial gain or loss | ​ |  | 941 | ​ |  | 267 | ​ |  | 2,470 | ​ |  | 619
Net change | ​ |  | 206 | ​ | ​ | 271 | ​ |  | 2,418 | ​ |  | 813
Tax expense | ​ |  | 65 | ​ |  | 86 | ​ |  | 795 | ​ |  | 257
Net change in pension and other postretirement obligations | ​ |  | 141 | ​ |  | 185 | ​ |  | 1,623 | ​ |  | 556
Change in unrealized gain or loss on derivatives: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Change in net unrealized gain or loss during the period | ​ |  | 225 | ​ |  | 100 | ​ |  | 3,767 | ​ |  | (25,098)
Reclassification adjustment for loss included in loss on termination of derivatives | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 16,505 | ​ | ​ | —
Reclassification adjustment for expense included in interest expense | ​ |  | 38 | ​ |  | 2,319 | ​ |  | 902 | ​ |  | 3,679
Net change | ​ |  | 263 | ​ |  | 2,419 | ​ |  | 21,174 | ​ |  | (21,419)
Tax expense (benefit) | ​ |  | 82 | ​ |  | 766 | ​ |  | 6,712 | ​ |  | (6,783)
Net change in unrealized gain or loss on derivatives, net of reclassification adjustments and tax | ​ |  | 181 | ​ |  | 1,653 | ​ |  | 14,462 | ​ |  | (14,636)
Other comprehensive (loss) income, net of tax | ​ | $ | (5,618) | ​ | $ | 2,864 | ​ | $ | 4,882 | ​ | $ | (5,599)
​

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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 http://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 http://asc.fasb.org/extlink&oid=120395209&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 http://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 http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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