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COMPREHENSIVE INCOME (Tables) | 6 Months Ended
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Jun. 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
Six Months Ended June 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 10,075 | ​ | $ | (2,114) | ​ | $ | 7,961
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses | ​ |  | 88 | ​ |  | (18) | ​ |  | 70
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (14) | ​ |  | 3 | ​ |  | (11)
Other comprehensive income on unfunded retirement obligations | ​ |  | 74 | ​ |  | (15) | ​ |  | 59
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total other comprehensive income | ​ | $ | 10,149 | ​ | $ | (2,129) | ​ | $ | 8,020
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Six Months Ended June 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 9,431 | ​ | $ | (1,980) | ​ | $ | 7,451
Reclassification adjustment for (gains) realized in income | ​ | ​ | (7) | ​ | ​ | 1 | ​ | ​ | (6)
Other comprehensive income on available-for-sale debt securities | ​ | ​ | 9,424 | ​ | ​ | (1,979) | ​ | ​ | 7,445
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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 | ​ |  | (15) | ​ |  | 3 | ​ |  | (12)
Other comprehensive income on unfunded retirement obligations | ​ |  | 199 | ​ |  | (42) | ​ |  | 157
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total other comprehensive income | ​ | $ | 9,623 | ​ | $ | (2,021) | ​ | $ | 7,602
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Three Months Ended June 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities, |  | ​ |  |  | ​ |  |  | ​ |
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 2,835 | ​ | $ | (593) | ​ | $ | 2,242
Unfunded pension and postretirement obligations, | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net actuarial loss | ​ |  |  | ​ |  |  | ​ |  |
included in net periodic benefit cost | ​ |  | (6) | ​ |  | 1 | ​ |  | (5)
Total other comprehensive income | ​ | $ | 2,829 | ​ | $ | (592) | ​ | $ | 2,237
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
Three Months Ended June 30, 2019 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: |  | ​ |  |  | ​ |  |  | ​ |
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 5,170 | ​ | $ | (1,085) | ​ | $ | 4,085
Reclassification adjustment for (gains) realized in income | ​ |  | (7) | ​ |  | 1 | ​ |  | (6)
Other comprehensive income on available-for-sale debt securities | ​ |  | 5,163 | ​ |  | (1,084) | ​ |  | 4,079
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net actuarial loss | ​ |  |  | ​ |  |  | ​ |  |
included in net periodic benefit cost | ​ |  | (7) | ​ |  | 1 | ​ |  | (6)
Other comprehensive loss on unfunded retirement obligations | ​ |  | (7) | ​ |  | 1 | ​ |  | (6)
Total other comprehensive income | ​ | $ | 5,156 | ​ | $ | (1,083) | ​ | $ | 4,073
​
Schedule of changes in the components of accumulated other comprehensive income (loss) | ​
​ |  | 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 items reclassified out of each component of other comprehensive income (loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Unrealized |  | Accumulated |  |  | ​
​ | ​ | Gains | ​ | Unfunded | ​ | Other
​ |  | (Losses) |  | Retirement |  | Comprehensive
​ |  | on Securities |  | Obligations |  | Income (Loss)
Six Months Ended June 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | 3,511 | ​ | $ | 180 | ​ | $ | 3,691
Other comprehensive income during six months ended June 30, 2020 | ​ |  | 7,961 | ​ |  | 59 | ​ |  | 8,020
Balance, end of period | ​ | $ | 11,472 | ​ | $ | 239 | ​ | $ | 11,711
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six Months Ended June 30, 2019 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | (4,307) | ​ | $ | 137 | ​ | $ | (4,170)
Other comprehensive income during six months ended June 30, 2019 | ​ |  | 7,445 | ​ |  | 157 | ​ |  | 7,602
Balance, end of period | ​ | $ | 3,138 | ​ | $ | 294 | ​ | $ | 3,432
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Unrealized |  |  | ​ |  | Accumulated
​ | ​ | Gains | ​ | Unfunded | ​ | Other
​ | ​ | (Losses) | ​ | Retirement | ​ | Comprehensive
​ | ​ | on Securities | ​ | Obligations | ​ | Income (Loss)
Three Months Ended June 30, 2020 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | 9,230 | ​ | $ | 244 | ​ | $ | 9,474
Other comprehensive income (loss) during three months ended June 30, 2020 | ​ |  | 2,242 | ​ |  | (5) | ​ |  | 2,237
Balance, end of period | ​ | $ | 11,472 | ​ | $ | 239 | ​ | $ | 11,711
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended June 30, 2019 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | (941) | ​ | $ | 300 | ​ | $ | (641)
Other comprehensive income (loss) during three months ended June 30, 2019 | ​ |  | 4,079 | ​ |  | (6) | ​ |  | 4,073
Balance, end of period | ​ | $ | 3,138 | ​ | $ | 294 | ​ | $ | 3,432

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