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Accumulated other comprehensive loss (Tables) | 3 Months Ended
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Mar. 31, 2026
Accumulated other comprehensive loss |
Schedule of components of AOCL included in stockholders' equity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ ​ ​ | ​ | March 31, 2026 | ​ ​ ​ | ​ | December 31, 2025 |
Net unrealized loss on investment securities available for sale | ​ | $ | (33,037) | ​ | $ | (29,144) | ​
Income tax benefit | ​ |  | (7,244) | ​ |  | (6,390) | ​
Net of income taxes | ​ |  | (25,793) | ​ |  | (22,754) | ​
Benefit plan adjustments | ​ |  | (2,178) | ​ |  | (2,178) | ​
Income tax benefit | ​ |  | (478) | ​ |  | (478) | ​
Net of income taxes | ​ |  | (1,700) | ​ |  | (1,700) | ​
Derivative adjustments | ​ |  | (147) | ​ |  | (303) | ​
Income tax benefit | ​ |  | (32) | ​ |  | (66) | ​
Net of income taxes | ​ |  | (115) | ​ |  | (237) | ​
Accumulated other comprehensive loss | ​ | $ | (27,608) | ​ | $ | (24,691) | ​
Schedule of other comprehensive (loss) income and related tax effects | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ ​ ​ | March 31, 2026 | ​ ​ ​ | December 31, 2025
Unrealized (loss) gain on investment securities available for sale | ​ | $ | (3,383) | ​ | $ | 5,572
Net loss (gain) on the sale of investment securities available for sale (1) | ​ | ​ | (510) | ​ | ​ | ​
Other comprehensive (loss) income on available-for-sale debt securities | ​ | ​ | (3,893) | ​ | ​ | 5,572
Net change in derivatives | ​ | ​ | 156 | ​ | ​ | (148)
Other comprehensive (loss) income before taxes | ​ | ​ | (3,737) | ​ | ​ | 5,424
Income tax (benefit) expense | ​ | ​ | (820) | ​ | ​ | 1,183
Other comprehensive (loss) income | ​ | $ | (2,917) | ​ | $ | 4,241
​
(1) | Represents amounts reclassified out of accumulated other comprehensive (loss) income and included in gains on the sale of investment securities on the consolidated statements of income and comprehensive income.
​

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 + Details
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