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Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2023
Other Comprehensive Income (Loss) |
Schedule of reconciliation of the changes in the components of other comprehensive income and loss | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
​ | ​ | ​ | ​ | Tax | ​ | ​ | ​ | ​ | ​ | Tax | ​ | ​ | ​ | ​ | ​ | Tax | ​ | ​
​ | ​ | Pre-Tax | ​ | (Expense) | ​ | After-Tax | ​ | Pre-Tax | ​ | (Expense) | ​ | After-Tax | ​ | Pre-Tax | ​ | (Expense) | ​ | After-Tax
(dollars in thousands) | ​ | Amount | ​ | Benefit | ​ | Amount | ​ | Amount | ​ | Benefit | ​ | Amount | ​ | Amount | ​ | Benefit | ​ | Amount
Debt Securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in fair value | ​ | $ | 58,868 | ​ | $ | (14,775) | ​ | $ | 44,093 | ​ | $ | (125,634) | ​ | $ | 31,534 | ​ | $ | (94,100) | ​ | $ | (19,433) | ​ | $ | 4,878 | ​ | $ | (14,555)
Less: reclassification adjustment from amortization of securities transferred from AFS to HTM (1) | ​ | ​ | (328) | ​ | ​ | 82 | ​ | ​ | (246) | ​ | ​ | (382) | ​ | ​ | 96 | ​ | ​ | (286) | ​ | ​ | (326) | ​ | ​ | 82 | ​ | ​ | (244)
Less: reclassification adjustment for net realized losses (2) | ​ | ​ | (24,643) | ​ | ​ | 6,185 | ​ | ​ | (18,458) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Net change | ​ | ​ | 33,897 | ​ | ​ | (8,508) | ​ | ​ | 25,389 | ​ | ​ | (126,016) | ​ | ​ | 31,630 | ​ | ​ | (94,386) | ​ | ​ | (19,759) | ​ | ​ | 4,960 | ​ | ​ | (14,799)
Cash Flow Hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in fair value | ​ | ​ | 176 | ​ | ​ | (59) | ​ | ​ | 117 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Less: reclassified AOCI gain (loss) into interest expense (3) | ​ | ​ | (473) | ​ | ​ | 119 | ​ | ​ | (354) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Net change | ​ | ​ | (297) | ​ | ​ | 60 | ​ | ​ | (237) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Other Derivatives: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in fair value | ​ | ​ | (241) | ​ | ​ | 75 | ​ | ​ | (166) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (125) | ​ | ​ | 31 | ​ | ​ | (94)
Less: reclassified AOCI gain (loss) into interest expense (4) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Net change | ​ | ​ | (241) | ​ | ​ | 75 | ​ | ​ | (166) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (125) | ​ | ​ | 31 | ​ | ​ | (94)
Other comprehensive income (loss) | ​ | $ | 33,359 | ​ | $ | (8,373) | ​ | $ | 24,986 | ​ | $ | (126,016) | ​ | $ | 31,630 | ​ | $ | (94,386) | ​ | $ | (19,884) | ​ | $ | 4,991 | ​ | $ | (14,893)
(1) | Reclassified into taxable and/or exempt from federal income taxes interest income on investment securities on the consolidated statements of income. Refer to Note 5 (Investment Securities) for further details.
(2) | Reclassified into net gains (losses) on investment securities in the consolidated statements of income. Refer to Note 5 (Investment Securities) for further details.
(3) | Reclassified into interest expense on short-term borrowings on the consolidated statements of income. Refer to Note 25 (Derivative Instruments) for further details.
(4) | Reclassified into interest income on loans, including fees and/or interest income on taxable investment securities on the consolidated statements of income. Refer to Note 25 (Derivative Instruments) for further details.
Schedule of changes in each component of AOCI | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Net Unrealized | ​ | Net Unrealized | ​ | ​
​ | ​ | Net Unrealized | ​ | Gains (Losses) on | ​ | Gains (Losses) | ​ | ​ | ​
​ | ​ | Gains (Losses) on | ​ | Cash Flow | ​ | on Other | ​ | ​
(dollars in thousands) |  | Debt Securities (1) |  | Hedges (1) |  | Derivatives (1) |  | AOCI (1)
Balance at December 31, 2020 | ​ | $ | 10,638 | ​ | $ | — | ​ | $ | — | ​ | $ | 10,638
Other comprehensive income (loss) before reclassifications | ​ | ​ | (14,555) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (14,555)
Less: Amounts reclassified from AOCI | ​ | ​ | (244) | ​ | ​ | — | ​ | ​ | (94) | ​ | ​ | (338)
Other comprehensive income (loss) | ​ | ​ | (14,799) | ​ | ​ | — | ​ | ​ | (94) | ​ | ​ | (14,893)
Balance at December 31, 2021 | ​ | ​ | (4,161) | ​ | ​ | — | ​ | ​ | (94) | ​ | ​ | (4,255)
Other comprehensive income (loss) before reclassifications | ​ | ​ | (94,100) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (94,100)
Less: Amounts reclassified from AOCI | ​ | ​ | (286) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (286)
Other comprehensive income (loss) | ​ | ​ | (94,386) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (94,386)
Balance at December 31, 2022 | ​ | ​ | (98,547) | ​ | ​ | — | ​ | ​ | (94) | ​ | ​ | (98,641)
Other comprehensive income (loss) before reclassifications | ​ | ​ | 44,093 | ​ | ​ | 117 | ​ | ​ | (166) | ​ | ​ | 44,044
Less: Amounts reclassified from AOCI | ​ | ​ | (18,704) | ​ | ​ | (354) | ​ | ​ | — | ​ | ​ | (19,058)
Other comprehensive income (loss) | ​ | ​ | 25,389 | ​ | ​ | (237) | ​ | ​ | (166) | ​ | ​ | 24,986
Balance at December 31, 2023 | ​ | $ | (73,158) | ​ | $ | (237) | ​ | $ | (260) | ​ | $ | (73,655)
(1) | All amounts net of tax.

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