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STOCKHOLDERS' EQUITY (Tables) | 6 Months Ended
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Jun. 30, 2023
Equity [Abstract] |
Change in Accumulated Other Comprehensive Income | The change in AOCI for the three and six months ended June 30, 2023 is summarized as follows, net of tax (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Unrealized Gains |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | (Losses) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | for AFS | ​ | ​ | ​ | ​ | Unrealized | ​ | ​ | ​
​ | ​ | (Losses) | ​ | Securities | ​ | Change in Fair | ​ | Gains | ​ | ​ | ​
​ | ​ | on AFS | ​ | Transferred to | ​ | Value of Cash | ​ | (Losses) on | ​ | ​ | ​
​ | ​ | Securities | ​ | HTM | ​ | Flow Hedge | ​ | BOLI | ​ | Total
AOCI (loss) - March 31, 2023 | ​ | $ | (321,265) | ​ | $ | 14 | ​ | $ | (40,896) | ​ | $ | 214 | ​ | $ | (361,933)
Other comprehensive (loss) income: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  |
Other comprehensive loss before reclassification | ​ |  | (32,544) | ​ | ​ | — | ​ | ​ | (16,325) | ​ | ​ | — | ​ |  | (48,869)
Amounts reclassified from AOCI into earnings | ​ |  | (2) | ​ | ​ | (2) | ​ | ​ | — | ​ | ​ | (61) | ​ |  | (65)
Net current period other comprehensive (loss) income | ​ |  | (32,546) | ​ |  | (2) | ​ |  | (16,325) | ​ |  | (61) | ​ |  | (48,934)
AOCI (loss) - June 30, 2023 | ​ | $ | (353,811) | ​ | $ | 12 | ​ | $ | (57,221) | ​ | $ | 153 | ​ | $ | (410,867)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 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, 2022 | ​ | $ | (363,919) | ​ | $ | 17 | ​ | $ | (54,610) | ​ | $ | 226 | ​ | $ | (418,286)
Other comprehensive income (loss): | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  |
Other comprehensive (loss) income before reclassification | ​ |  | (476) | ​ | ​ | — | ​ | ​ | (2,611) | ​ | ​ | 10 | ​ |  | (3,077)
Amounts reclassified from AOCI into earnings | ​ |  | 10,584 | ​ | ​ | (5) | ​ | ​ | — | ​ | ​ | (83) | ​ |  | 10,496
Net current period other comprehensive income (loss) | ​ |  | 10,108 | ​ |  | (5) | ​ |  | (2,611) | ​ |  | (73) | ​ |  | 7,419
AOCI (loss) - June 30, 2023 | ​ | $ | (353,811) | ​ | $ | 12 | ​ | $ | (57,221) | ​ | $ | 153 | ​ | $ | (410,867)
​ ​ ​ ​ The change in AOCI for the three and six months ended June 30, 2022 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) - March 31, 2022 | ​ | $ | (164,204) | ​ | $ | 30 | ​ | $ | (24,880) | ​ | $ | (2,429) | ​ | $ | (191,483)
Other comprehensive (loss) income: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive loss before reclassification | ​ |  | (113,374) | ​ | ​ | — | ​ | ​ | (11,572) | ​ | ​ | — | ​ | ​ | (124,946)
Amounts reclassified from AOCI into earnings | ​ |  | 1 | ​ | ​ | (5) | ​ | ​ | — | ​ | ​ | 150 | ​ | ​ | 146
Net current period other comprehensive (loss) income | ​ |  | (113,373) | ​ |  | (5) | ​ |  | (11,572) | ​ |  | 150 | ​ |  | (124,800)
AOCI (loss) - June 30, 2022 | ​ | $ | (277,577) | ​ | $ | 25 | ​ | $ | (36,452) | ​ | $ | (2,279) | ​ | $ | (316,283)
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 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- December 31, 2021 | ​ | $ | 22,763 | ​ | $ | 35 | ​ | $ | (1,567) | ​ | $ | (2,596) | ​ | $ | 18,635
Other comprehensive (loss) income: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive loss before reclassification | ​ |  | (300,341) | ​ | ​ | — | ​ | ​ | (34,885) | ​ | ​ | — | ​ | ​ | (335,226)
Amounts reclassified from AOCI into earnings | ​ |  | 1 | ​ | ​ | (10) | ​ | ​ | — | ​ | ​ | 317 | ​ | ​ | 308
Net current period other comprehensive (loss) income | ​ |  | (300,340) | ​ |  | (10) | ​ |  | (34,885) | ​ |  | 317 | ​ |  | (334,918)
AOCI (loss) - June 30, 2022 | ​ | $ | (277,577) | ​ | $ | 25 | ​ | $ | (36,452) | ​ | $ | (2,279) | ​ | $ | (316,283)

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