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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) | 12 Months Ended
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Dec. 31, 2023
ACCUMULATED OTHER COMPREHENSIVE LOSS |
Schedule of accumulated other comprehensive loss, net of tax | The following table presents the changes in each component of accumulated other comprehensive loss, net of tax, for the periods ended December 31, 2023, 2022, and 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | YEAR ENDED DECEMBER 31, 2023 | ​ | YEAR ENDED DECEMBER 31, 2022 | ​ | YEAR ENDED DECEMBER 31, 2021
​ |  | Net |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Net |  | ​ | ​ |  | ​ | ​ |  | Net |  | ​ | ​ |  | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gains and | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Gains and | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Losses on | ​ | ​ | ​ | Defined | ​ | ​ | ​ | ​ | Losses on | ​ | Defined | ​ | ​ | ​ | ​ | Losses on | ​ | Defined | ​ | ​ | ​
​ | ​ | Investment | ​ | Interest | ​ | Benefit | ​ | ​ | ​ | ​ | Investment | ​ | Benefit | ​ | ​ | ​ | ​ | Investment | ​ | Benefit | ​ | ​ | ​
​ | ​ | Securities | ​ | Rate | ​ | Pension | ​ | ​ | ​ | ​ | Securities | ​ | Pension | ​ | ​ | ​ | ​ | Securities | ​ | Pension | ​ | ​ | ​
​ | ​ | AFS(1) | ​ | Hedge(1) | ​ | Items(1) | ​ | Total(1) | ​ | AFS(1) | ​ | Items(1) | ​ | Total(1) | ​ | AFS(1) | ​ | Items(1) | ​ | Total(1)
Beginning balance | ​ | $ | (14,938) | ​ | $ | — | ​ | $ | (7,582) | ​ | $ | (22,520) | ​ | $ | 1,386 | ​ | $ | (7,898) | ​ | $ | (6,512) | ​ | $ | 3,539 | ​ | $ | (16,737) | ​ | $ | (13,198)
Other comprehensive income (loss) before reclassifications | ​ |  | 479 | ​ |  | 11 | ​ |  | 1,659 | ​ |  | 2,149 | ​ |  | (16,324) | ​ |  | (2,708) | ​ |  | (19,032) | ​ |  | (2,087) | ​ |  | 5,555 | ​ |  | 3,468
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 729 | ​ |  | (363) | ​ |  | 29 | ​ |  | 395 | ​ |  | — | ​ |  | 3,024 | ​ |  | 3,024 | ​ |  | (66) | ​ |  | 3,284 | ​ |  | 3,218
Net current period other comprehensive income (loss) | ​ |  | 1,208 | ​ |  | (352) | ​ |  | 1,688 | ​ |  | 2,544 | ​ |  | (16,324) | ​ |  | 316 | ​ |  | (16,008) | ​ |  | (2,153) | ​ |  | 8,839 | ​ |  | 6,686
Ending balance | ​ | $ | (13,730) | ​ | $ | (352) | ​ | $ | (5,894) | ​ | $ | (19,976) | ​ | $ | (14,938) | ​ | $ | (7,582) | ​ | $ | (22,520) | ​ | $ | 1,386 | ​ | $ | (7,898) | ​ | $ | (6,512)
(1) | Amounts in parentheses indicate debits on the Consolidated Balance Sheets.
Schedule of reclassification out of accumulated other comprehensive loss | The following table presents the amounts reclassified out of each component of accumulated other comprehensive loss for the periods ended December 31, 2023, 2022, and 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amount reclassified from accumulated | ​ | ​
​ | ​ | other comprehensive loss(1) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Details about accumulated other | ​ | YEAR ENDED | ​ | YEAR ENDED | ​ | YEAR ENDED | ​ | Affected line item in the
comprehensive loss components |  | DECEMBER 31, 2023 |  | DECEMBER 31, 2022 |  | DECEMBER 31, 2021 |  | statement of operations
Realized (gains) losses on sale of securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | 922 | ​ | $ | — | ​ | $ | (84) | ​ | Net realized gains (losses) on investment securities
​ | ​ | ​ | (193) | ​ | ​ | — | ​ | ​ | 18 | ​ | Provision (benefit) for income taxes
​ | ​ | $ | 729 | ​ | $ | — | ​ | $ | (66) |  | ​
Interest rate hedge | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | (460) | ​ | $ | — | ​ | $ | — | ​ | Interest expense - Deposits
​ | ​ | ​ | 97 | ​ | ​ | — | ​ | ​ | — | ​ | Provision (benefit) for income taxes
​ | ​ | $ | (363) | ​ | $ | — | ​ | $ | — |  | ​
Amortization of estimated defined benefit pension plan loss(2) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | 37 | ​ | $ | 3,828 | ​ | $ | 4,157 |  | Other expense
​ | ​ |  | (8) | ​ |  | (804) | ​ |  | (873) |  | Provision (benefit) for income taxes
​ | ​ | $ | 29 | ​ | $ | 3,024 | ​ | $ | 3,284 |  | ​
Total reclassifications for the period | ​ | $ | 395 | ​ | $ | 3,024 | ​ | $ | 3,218 |  | ​
(1) | Amounts in parentheses indicate credits.
(2) | These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost (see Note 16 for additional details).

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