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STOCKHOLDERS' EQUITY (Tables) | 3 Months Ended
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Mar. 31, 2025
Equity [Abstract] |
Change in Accumulated Other Comprehensive Income | The change in AOCI for the three months ended March 31, 2025 is summarized as follows, net of tax (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Unrealized Gains |  | ​ | ​ |  | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | (Losses) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | for AFS | ​ | ​ | ​ | ​ | Unrealized | ​ | ​ | ​
​ | ​ | Gains (Losses) | ​ | Securities | ​ | Change in Fair | ​ | Gains | ​ | ​ | ​
​ | ​ | on AFS | ​ | Transferred to | ​ | Value of Cash | ​ | (Losses) on | ​ | ​ | ​
​ | ​ | Securities | ​ | HTM | ​ | Flow Hedge | ​ | BOLI | ​ | Total
AOCI (loss) – December 31, 2024 | ​ | $ | (317,142) | ​ | $ | — | ​ | $ | (43,078) | ​ | $ | 534 | ​ | $ | (359,686)
Other comprehensive (loss) income: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  |
Other comprehensive income (loss) before reclassification | ​ |  | 15,754 | ​ | ​ | — | ​ | ​ | 10,336 | ​ | ​ | (10) | ​ |  | 26,080
Amounts reclassified from AOCI into earnings | ​ |  | 81 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (190) | ​ |  | (109)
Net current period other comprehensive income (loss) | ​ |  | 15,835 | ​ |  | — | ​ |  | 10,336 | ​ |  | (200) | ​ |  | 25,971
AOCI (loss) – March 31, 2025 | ​ | $ | (301,307) | ​ | $ | — | ​ | $ | (32,742) | ​ | $ | 334 | ​ | $ | (333,715)
​ ​ The change in AOCI for the three months ended March 31, 2024 is summarized as follows, net of tax (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Unrealized Gain |  | ​ | ​ |  | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | (Losses) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | for AFS | ​ | ​ | ​ | ​ | Unrealized | ​ | ​ | ​
​ | ​ | Gains (Losses) | ​ | Securities | ​ | Change in Fair | ​ | Gains | ​ | ​ | ​
​ | ​ | on AFS | ​ | Transferred to | ​ | Value of Cash | ​ | (Losses) | ​ | ​ | ​
​ | ​ | Securities | ​ | HTM | ​ | Flow Hedge | ​ | on BOLI | ​ | Total
AOCI (loss) – December 31, 2023 | ​ | $ | (302,532) | ​ | $ | 6 | ​ | $ | (42,165) | ​ | $ | 1,342 | ​ | $ | (343,349)
Other comprehensive (loss) income: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive loss before reclassification | ​ |  | (20,501) | ​ | ​ | — | ​ | ​ | (10,253) | ​ | ​ | (16) | ​ | ​ | (30,770)
Amounts reclassified from AOCI into earnings | ​ |  | (2) | ​ | ​ | (2) | ​ | ​ | — | ​ | ​ | (175) | ​ | ​ | (179)
Net current period other comprehensive loss | ​ |  | (20,503) | ​ |  | (2) | ​ |  | (10,253) | ​ |  | (191) | ​ |  | (30,949)
AOCI (loss) – March 31, 2024 | ​ | $ | (323,035) | ​ | $ | 4 | ​ | $ | (52,418) | ​ | $ | 1,151 | ​ | $ | (374,298)
​

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