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COMPREHENSIVE (LOSS) INCOME (Tables) | 6 Months Ended
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Jun. 30, 2022
COMPREHENSIVE (LOSS) INCOME |
Schedule of the components of other comprehensive income (loss), and the related tax effects | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Three Months Ended June 30, 2022 |  | ​ |  |  | ​ |  |  | ​ |
Available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding losses on available-for-sale debt securities | ​ | $ | (20,018) | ​ | $ | 4,202 | ​ | $ | (15,816)
Reclassification adjustment for losses realized in income | ​ | ​ | 1 | ​ | ​ | 0 | ​ | ​ | 1
Other comprehensive loss from available-for-sale debt securities | ​ | ​ | (20,017) | ​ | ​ | 4,202 | ​ | ​ | (15,815)
Unfunded pension and postretirement obligations, | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (11) | ​ |  | 2 | ​ |  | (9)
Other comprehensive loss on unfunded retirement obligations | ​ | ​ | (11) | ​ | ​ | 2 | ​ | ​ | (9)
Total other comprehensive loss | ​ | $ | (20,028) | ​ | $ | 4,204 | ​ | $ | (15,824)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Three Months Ended June 30, 2021 |  | ​ |  |  | ​ |  |  | ​ |
Available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 2,941 | ​ | $ | (619) | ​ | $ | 2,322
Reclassification adjustment for (gains) realized in income | ​ |  | (2) | ​ |  | 0 | ​ |  | (2)
Other comprehensive income from available-for-sale debt securities | ​ | $ | 2,939 | ​ | $ | (619) | ​ | $ | 2,320
Unfunded pension and postretirement obligations, | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (4) | ​ |  | 1 | ​ |  | (3)
Other comprehensive loss on unfunded retirement obligations | ​ | ​ | (4) | ​ | ​ | 1 | ​ | ​ | (3)
Total other comprehensive income | ​ | $ | 2,935 | ​ | $ | (618) | ​ | $ | 2,317
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Six Months Ended June 30, 2022 |  | ​ |  |  | ​ |  |  | ​ |
Available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding losses on available-for-sale debt securities | ​ | $ | (52,043) | ​ | $ | 10,928 | ​ | $ | (41,115)
Reclassification adjustment for (gains) realized in income | ​ | ​ | (1) | ​ | ​ | 0 | ​ | ​ | (1)
Other comprehensive loss from available-for-sale debt securities | ​ | ​ | (52,044) | ​ | ​ | 10,928 | ​ | ​ | (41,116)
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses | ​ | ​ | 133 | ​ | ​ | (27) | ​ | ​ | 106
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (22) | ​ |  | 4 | ​ |  | (18)
Other comprehensive income on unfunded retirement obligations | ​ | ​ | 111 | ​ | ​ | (23) | ​ | ​ | 88
Total other comprehensive loss | ​ | $ | (51,933) | ​ | $ | 10,905 | ​ | $ | (41,028)
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Six Months Ended June 30, 2021 |  | ​ |  |  | ​ |  |  | ​ |
Available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding losses on available-for-sale debt securities | ​ | $ | (3,173) | ​ | $ | 666 | ​ | $ | (2,507)
Reclassification adjustment for (gains) realized in income | ​ | ​ | (2) | ​ | ​ | 0 | ​ | ​ | (2)
Other comprehensive loss from available-for-sale debt securities | ​ | ​ | (3,175) | ​ | ​ | 666 | ​ | ​ | (2,509)
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses | ​ | ​ | (5) | ​ | ​ | 1 | ​ | ​ | (4)
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (8) | ​ |  | 2 | ​ |  | (6)
Other comprehensive loss on unfunded retirement obligations | ​ | ​ | (13) | ​ | ​ | 3 | ​ | ​ | (10)
Total other comprehensive loss | ​ | $ | (3,188) | ​ | $ | 669 | ​ | $ | (2,519)
Schedule of components of other comprehensive income (loss) and affected line item in the consolidated statements of income | ​
​ | ​ | ​
​ | ​ | Affected Line Item in the
Description |  | Consolidated Statements of Income
Reclassification adjustment for losses (gains) realized in income (before-tax) | ​ | Realized (losses) gains on available-for-sale debt securities, net
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost (before-tax) |  | Other noninterest expense
Income tax effect | ​ | Income tax provision
Schedule of changes in the components of accumulated other comprehensive income (loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Unrealized |  |  | ​ |  | Accumulated
​ | ​ | (Losses) | ​ | Unfunded | ​ | Other
​ | ​ | Gains | ​ | Retirement | ​ | Comprehensive
​ | ​ | on Securities | ​ | Obligations | ​ | (Loss) Income
Three Months Ended June 30, 2022 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | (20,492) | ​ | $ | 314 | ​ | $ | (20,178)
Other comprehensive loss during three months ended June 30, 2022 | ​ |  | (15,815) | ​ |  | (9) | ​ |  | (15,824)
Balance, end of period | ​ | $ | (36,307) | ​ | $ | 305 | ​ | $ | (36,002)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended June 30, 2021 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | 6,847 | ​ | $ | 112 | ​ | $ | 6,959
Other comprehensive income (loss) during three months ended June 30, 2021 | ​ |  | 2,320 | ​ |  | (3) | ​ |  | 2,317
Balance, end of period | ​ | $ | 9,167 | ​ | $ | 109 | ​ | $ | 9,276
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Unrealized |  | ​ |  | Accumulated
​ | ​ | (Losses) | ​ | Unfunded | ​ | Other
​ |  | Gains |  | Retirement |  | Comprehensive
​ |  | on Securities |  | Obligations |  | (Loss) Income
Six Months Ended June 30, 2022 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | 4,809 | ​ | $ | 217 | ​ | $ | 5,026
Other comprehensive (loss) income during six months ended June 30, 2022 | ​ |  | (41,116) | ​ |  | 88 | ​ |  | (41,028)
Balance, end of period | ​ | $ | (36,307) | ​ | $ | 305 | ​ | $ | (36,002)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six Months Ended June 30, 2021 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | 11,676 | ​ | $ | 119 | ​ | $ | 11,795
Other comprehensive loss during six months ended June 30, 2021 | ​ |  | (2,509) | ​ |  | (10) | ​ |  | (2,519)
Balance, end of period | ​ | $ | 9,167 | ​ | $ | 109 | ​ | $ | 9,276

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