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COMPREHENSIVE INCOME (Tables) | 9 Months Ended
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Sep. 30, 2020
COMPREHENSIVE 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
Nine Months Ended September 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 9,980 | ​ | $ | (2,095) | ​ | $ | 7,885
Reclassification adjustment for (gains) realized in income | ​ | ​ | (25) | ​ | ​ | 5 | ​ | ​ | (20)
Other comprehensive income on available-for-sale debt securities | ​ | ​ | 9,955 | ​ | ​ | (2,090) | ​ | ​ | 7,865
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses included in other comprehensive income | ​ |  | 88 | ​ |  | (18) | ​ |  | 70
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (22) | ​ |  | 5 | ​ |  | (17)
Other comprehensive income on unfunded retirement obligations | ​ |  | 66 | ​ |  | (13) | ​ |  | 53
Total other comprehensive income | ​ | $ | 10,021 | ​ | $ | (2,103) | ​ | $ | 7,918
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Nine Months Ended September 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 10,754 | ​ | $ | (2,258) | ​ | $ | 8,496
Reclassification adjustment for (gains) realized in income | ​ | ​ | (20) | ​ | ​ | 4 | ​ | ​ | (16)
Other comprehensive income on available-for-sale debt securities | ​ | ​ | 10,734 | ​ | ​ | (2,254) | ​ | ​ | 8,480
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses included in other comprehensive income | ​ |  | 214 | ​ |  | (45) | ​ |  | 169
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (23) | ​ |  | 4 | ​ |  | (19)
Other comprehensive income on unfunded retirement obligations | ​ |  | 191 | ​ |  | (41) | ​ |  | 150
Total other comprehensive income | ​ | $ | 10,925 | ​ | $ | (2,295) | ​ | $ | 8,630
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Three Months Ended September 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: |  | ​ |  |  | ​ |  |  | ​ |
Unrealized holding losses on available-for-sale debt securities | ​ | $ | (95) | ​ | $ | 19 | ​ | $ | (76)
Reclassification adjustment for (gains) realized in income | ​ | ​ | (25) | ​ | ​ | 5 | ​ | ​ | (20)
Other comprehensive loss on available-for-sale debt securities | ​ | ​ | (120) | ​ | ​ | 24 | ​ | ​ | (96)
Unfunded pension and postretirement obligations, | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (8) | ​ |  | 2 | ​ |  | (6)
Total other comprehensive loss | ​ | $ | (128) | ​ | $ | 26 | ​ | $ | (102)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Three Months Ended September 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: |  | ​ |  |  | ​ |  |  | ​ |
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 1,323 | ​ | $ | (278) | ​ | $ | 1,045
Reclassification adjustment for (gains) realized in income | ​ |  | (13) | ​ |  | 3 | ​ |  | (10)
Other comprehensive income on available-for-sale debt securities | ​ |  | 1,310 | ​ |  | (275) | ​ |  | 1,035
Unfunded pension and postretirement obligations, | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (8) | ​ |  | 1 | ​ |  | (7)
Total other comprehensive income | ​ | $ | 1,302 | ​ | $ | (274) | ​ | $ | 1,028
​
Schedule components of other comprehensive income and affected line item in the consolidated statements of income | ​
​ |  | Affected Line Item in the |
Description | ​ | Consolidated Statements of Income | ​
Amortization of prior service cost and | ​ | Other noninterest expense | ​
net actuarial loss included in net | ​ | ​ | ​
periodic benefit cost (before-tax) | ​ | ​ | ​
Reclassification adjustment for (gains) | ​ | Realized gains on available-for-sale | ​
realized in income (before-tax) | ​ | debt securities, net | ​
Income tax effect | ​ | Income tax provision | ​
Schedule of changes in the components of accumulated other comprehensive income (loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | ​ |  | ​ |  | Accumulated
​ | ​ | Unrealized | ​ | Unfunded | ​ | Other
​ |  | Gains |  | Retirement |  | Comprehensive
​ |  | on Securities |  | Obligations |  | Income (Loss)
Nine Months Ended September 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | 3,511 | ​ | $ | 180 | ​ | $ | 3,691
Other comprehensive income during nine months ended September 30, 2020 | ​ |  | 7,865 | ​ |  | 53 | ​ |  | 7,918
Balance, end of period | ​ | $ | 11,376 | ​ | $ | 233 | ​ | $ | 11,609
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, 2019 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | (4,307) | ​ | $ | 137 | ​ | $ | (4,170)
Other comprehensive income during nine months ended September 30, 2019 | ​ |  | 8,480 | ​ |  | 150 | ​ |  | 8,630
Balance, end of period | ​ | $ | 4,173 | ​ | $ | 287 | ​ | $ | 4,460
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Unrealized |  |  | ​ |  | Accumulated
​ | ​ | Gains | ​ | Unfunded | ​ | Other
​ | ​ | (Losses) | ​ | Retirement | ​ | Comprehensive
​ | ​ | on Securities | ​ | Obligations | ​ | Income
Three Months Ended September 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | 11,472 | ​ | $ | 239 | ​ | $ | 11,711
Other comprehensive loss during three months ended September 30, 2020 | ​ |  | (96) | ​ |  | (6) | ​ |  | (102)
Balance, end of period | ​ | $ | 11,376 | ​ | $ | 233 | ​ | $ | 11,609
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended September 30, 2019 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | 3,138 | ​ | $ | 294 | ​ | $ | 3,432
Other comprehensive income during three months ended September 30, 2019 | ​ |  | 1,035 | ​ |  | (7) | ​ |  | 1,028
Balance, end of period | ​ | $ | 4,173 | ​ | $ | 287 | ​ | $ | 4,460

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