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OTHER COMPREHENSIVE INCOME (Tables) | 6 Months Ended
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Jun. 30, 2023
OTHER COMPREHENSIVE INCOME |
Summary of OCI components and related tax effects | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Six Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
(in thousands) | ​ | 2023 |  | 2022 |  | 2023 |  | 2022 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-Sale Debt Securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gain (loss) on AFS debt securities | ​ | $ | (4,418) | ​ | $ | (10,133) | ​ | $ | 787 | ​ | $ | (31,382) | ​
Unrealized gain (loss) on AFS debt security for which a portion of OTTI has been recognized in earnings | ​ |  | 28 | ​ |  | (15) | ​ |  | 33 | ​ |  | 9 | ​
Net gains (losses) | ​ |  | (4,390) | ​ |  | (10,148) | ​ |  | 820 | ​ |  | (31,373) | ​
Income tax benefit (expense) related to items of other comprehensive income | ​ |  | 1,096 | ​ |  | 2,537 | ​ |  | (209) | ​ |  | 7,845 | ​
Net of tax | ​ |  | (3,294) | ​ |  | (7,611) | ​ | $ | 611 | ​ | $ | (23,528) | ​
Summary of the AOCI balances, net of tax | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 2023 |  | ​ | ​ |
(in thousands) | ​ | December 31, 2022 | ​ | Change | ​ | June 30, 2023 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gain (loss) on AFS debt securities | ​ | $ | (32,934) | ​ | $ | 578 | ​ | $ | (32,356) | ​
Unrealized gain on AFS debt security for which a portion of OTTI has been recognized in earnings | ​ |  | 955 | ​ |  | 33 | ​ |  | 988 | ​
Total unrealized gain (loss) | ​ | $ | (31,979) | ​ | $ | 611 | ​ | $ | (31,368) | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 2022 |  | ​ | ​ |
(in thousands) | ​ | December 31, 2021 | ​ | Change | ​ | June 30, 2022 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gain (loss) on AFS debt securities | ​ | $ | 890 | ​ | $ | (23,535) | ​ | $ | (22,645) | ​
Unrealized gain on AFS debt security for which a portion of OTTI has been recognized in earnings | ​ |  | 984 | ​ |  | 7 | ​ |  | 991 | ​
Total unrealized gain (loss) | ​ | $ | 1,874 | ​ | $ | (23,528) | ​ | $ | (21,654) | ​

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