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Accumulated other comprehensive loss (Tables) | 6 Months Ended
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Jun. 30, 2026
Accumulated other comprehensive loss |
Schedule of components of AOCL included in stockholders' equity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ ​ ​ | ​ | June 30, 2026 | ​ ​ ​ | ​ | December 31, 2025 | ​ |
Net unrealized loss on investment securities available for sale | ​ | $ | (30,606) | ​ | $ | (29,144) | ​ | ​
Income tax benefit | ​ |  | (6,711) | ​ |  | (6,390) | ​ | ​
Net of income taxes | ​ |  | (23,895) | ​ |  | (22,754) | ​ | ​
Benefit plan adjustments | ​ |  | (2,178) | ​ |  | (2,178) | ​ | ​
Income tax benefit | ​ |  | (478) | ​ |  | (478) | ​ | ​
Net of income taxes | ​ |  | (1,700) | ​ |  | (1,700) | ​ | ​
Derivative adjustments | ​ |  | (67) | ​ |  | (303) | ​ | ​
Income tax benefit | ​ |  | (14) | ​ |  | (66) | ​ | ​
Net of income taxes | ​ |  | (53) | ​ |  | (237) | ​ | ​
Accumulated other comprehensive loss | ​ | $ | (25,648) | ​ | $ | (24,691) | ​ | ​
Schedule of other comprehensive income (loss) and related tax effects | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
(Dollars in thousands) | ​ ​ ​ | June 30, 2026 | ​ ​ ​ | June 30, 2025 | ​ | June 30, 2026 | ​ ​ ​ | June 30, 2025
Unrealized gain (loss) on investment securities available for sale | ​ | $ | 2,431 | ​ | $ | 1,859 | ​ | $ | (952) | ​ | $ | 7,431
Net (gain) on the sale of investment securities available for sale (1) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (510) | ​ | ​ | ​
Other comprehensive income (loss) on available-for-sale debt securities | ​ | ​ | 2,431 | ​ | ​ | 1,859 | ​ | ​ | (1,462) | ​ | ​ | 7,431
Net change in derivatives | ​ | ​ | 80 | ​ | ​ | 16 | ​ | ​ | 236 | ​ | ​ | (132)
Other comprehensive income (loss) before taxes | ​ | ​ | 2,511 | ​ | ​ | 1,875 | ​ | ​ | (1,226) | ​ | ​ | 7,299
Income tax expense (benefit) | ​ | ​ | 551 | ​ | ​ | 409 | ​ | ​ | (269) | ​ | ​ | 1,592
Other comprehensive income (loss) | ​ | $ | 1,960 | ​ | $ | 1,466 | ​ | $ | (957) | ​ | $ | 5,707

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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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