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COMPREHENSIVE INCOME (Tables) | 12 Months Ended
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Dec. 31, 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
2020 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 10,504 | ​ | $ | (2,205) | ​ | $ | 8,299
Reclassification adjustment for (gains) realized in income | ​ | ​ | (169) | ​ | ​ | 35 | ​ | ​ | (134)
Other comprehensive income on available-for-sale debt securities | ​ | ​ | 10,335 | ​ | ​ | (2,170) | ​ | ​ | 8,165
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses included in other comprehensive income | ​ |  | (49) | ​ |  | 11 | ​ |  | (38)
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (29) | ​ |  | 6 | ​ |  | (23)
Other comprehensive loss on unfunded retirement obligations | ​ |  | (78) | ​ |  | 17 | ​ |  | (61)
Total other comprehensive income | ​ | $ | 10,257 | ​ | $ | (2,153) | ​ | $ | 8,104
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Before-Tax |  | Income Tax |  | Net-of-Tax
​ | ​ | Amount | ​ | Effect | ​ | Amount
2019 |  | ​ |  |  | ​ |  |  | ​ |
Unrealized gains on available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized holding gains on available-for-sale debt securities | ​ | $ | 9,920 | ​ | $ | (2,084) | ​ | $ | 7,836
Reclassification adjustment for (gains) realized in income | ​ | ​ | (23) | ​ | ​ | 5 | ​ | ​ | (18)
Other comprehensive income on available-for-sale debt securities | ​ | $ | 9,897 | ​ | $ | (2,079) | ​ | $ | 7,818
Unfunded pension and postretirement obligations: | ​ |  |  | ​ |  |  | ​ |  |
Changes from plan amendments and actuarial gains and losses included in other comprehensive income | ​ |  | 87 | ​ |  | (19) | ​ |  | 68
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost | ​ |  | (32) | ​ |  | 7 | ​ |  | (25)
Other comprehensive income on unfunded retirement obligations | ​ |  | 55 | ​ |  | (12) | ​ |  | 43
Total other comprehensive income | ​ | $ | 9,952 | ​ | $ | (2,091) | ​ | $ | 7,861
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 net actuarial loss included in net periodic benefit cost (before-tax) |  | Other noninterest expense
Reclassification adjustment for (gains) realized in income (before-tax) | ​ | Realized gains on available-for-sale debt securities, net
Income tax effect | ​ | Income tax provision
Schedule of changes in the components of accumulated other comprehensive income (loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Unrealized |  | Accumulated |  |  | ​
​ | ​ | Gains | ​ | Unfunded | ​ | Other
​ |  | (Losses) |  | Retirement |  | Comprehensive
​ |  | on Securities |  | Obligations |  | Income (Loss)
2020 |  | ​ |  |  | ​ |  |  | ​ |
Balance, beginning of period | ​ | $ | 3,511 | ​ | $ | 180 | ​ | $ | 3,691
Other comprehensive income (loss) during year ended December 31, 2020 | ​ |  | 8,165 | ​ |  | (61) | ​ |  | 8,104
Balance, end of period | ​ | $ | 11,676 | ​ | $ | 119 | ​ | $ | 11,795
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2019 | ​ |  |  | ​ |  |  | ​ |  |
Balance, beginning of period | ​ | $ | (4,307) | ​ | $ | 137 | ​ | $ | (4,170)
Other comprehensive income during year ended December 31, 2019 | ​ |  | 7,818 | ​ |  | 43 | ​ |  | 7,861
Balance, end of period | ​ | $ | 3,511 | ​ | $ | 180 | ​ | $ | 3,691

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580 + Details
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