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COMMITMENTS AND CONTINGENCIES (Tables) | 12 Months Ended
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Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract] |
Balances of Commitments and Contingencies | The following table presents the balances of commitments and contingencies as of December 31, (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023
Commitments with off-balance sheet risk: |  | ​ |  |  | ​ |
Commitments to extend credit(1) | ​ | $ | 5,987,562 | ​ | $ | 5,961,238
Letters of credit | ​ |  | 145,985 | ​ |  | 140,498
Total commitments with off-balance sheet risk | ​ | $ | 6,133,547 | ​ | $ | 6,101,736
(1) Includes unfunded overdraft protection.
Schedule of Pledged Assets, Not Separately Reported on Statement of Financial Position |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets 2024 | ​ | ​ | ​
​ |  | ​ | ​ |  | AFS |  | HTM |  | ​ | ​ |  | ​ | ​
​ | ​ | Cash | ​ | Securities (1) | ​ | Securities (1) | ​ | Loans (2) | ​ | Total
Public deposits | ​ | $ | — | ​ | $ | 771,486 | ​ | $ | 601,421 | ​ | $ | — | ​ | $ | 1,372,907
Repurchase agreements | ​ |  | — | ​ |  | 93,667 | ​ |  | — | ​ |  | — | ​ |  | 93,667
FHLB advances | ​ |  | — | ​ |  | 579,947 | ​ |  | 9,417 | ​ |  | 4,089,049 | ​ |  | 4,678,413
Derivatives | ​ |  | 134,668 | ​ |  | 62,199 | ​ |  | — | ​ |  | — | ​ |  | 196,867
Federal Reserve Discount Window | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,358,701 | ​ | ​ | 4,358,701
Other purposes | ​ |  | — | ​ | ​ | 18,713 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 18,713
Total pledged assets | ​ | $ | 134,668 | ​ | $ | 1,526,012 | ​ | $ | 610,838 | ​ | $ | 8,447,750 | ​ | $ | 10,719,268
(1) Balance represents market value. (2) Balance represents book value. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets 2023 | ​ | ​ | ​
​ |  | ​ | ​ |  | AFS |  | HTM |  | ​ | ​ |  | ​ | ​
​ | ​ | Cash | ​ | Securities (1) | ​ | Securities (1) | ​ | Loans (2) | ​ | Total
Public deposits | ​ | $ | — | ​ | $ | 749,398 | ​ | $ | 621,494 | ​ | $ | — | ​ | $ | 1,370,892
Repurchase agreements | ​ |  | — | ​ |  | 174,075 | ​ |  | — | ​ |  | — | ​ |  | 174,075
FHLB advances | ​ |  | — | ​ |  | 48,718 | ​ |  | — | ​ |  | 2,960,926 | ​ |  | 3,009,644
Derivatives | ​ |  | 154,382 | ​ |  | 61,311 | ​ |  | — | ​ |  | — | ​ |  | 215,693
Federal Reserve Discount Window (3) | ​ | ​ | — | ​ | ​ | 411,661 | ​ | ​ | 17,356 | ​ | ​ | 418,468 | ​ | ​ | 847,485
Other purposes | ​ |  | — | ​ | ​ | 15,591 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15,591
Total pledged assets | ​ | $ | 154,382 | ​ | $ | 1,460,754 | ​ | $ | 638,850 | ​ | $ | 3,379,394 | ​ | $ | 5,633,380
(1) Balance represents market value. (2) Balance represents book value. (3) Includes AFS and HTM securities pledged under the Bank Term Funding Program. ​

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