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COMMITMENTS AND CONTINGENCIES (Tables) | 3 Months Ended
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Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract] |
Balances of Commitments and Contingencies | The following table presents the balances of commitments and contingencies as of the periods ended (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2025 |  | December 31, 2024
Commitments with off-balance sheet risk: |  | ​ |  |  | ​ |
Commitments to extend credit(1) | ​ | $ | 5,745,699 | ​ | $ | 5,987,562
Letters of credit | ​ |  | 136,769 | ​ |  | 145,985
Total commitments with off-balance sheet risk | ​ | $ | 5,882,468 | ​ | $ | 6,133,547
(1) Includes unfunded overdraft protection.
Schedule of Pledged Assets, Not Separately Reported on Statement of Financial Position |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets as of March 31, 2025 | ​ | ​ | ​
​ |  | ​ | ​ |  | AFS |  | HTM |  | ​ | ​ |  | ​ | ​
​ | ​ | Cash | ​ | Securities (1) | ​ | Securities (1) | ​ | Loans (2) | ​ | Total
Public deposits | ​ | $ | — | ​ | $ | 772,731 | ​ | $ | 595,193 | ​ | $ | — | ​ | $ | 1,367,924
Repurchase agreements | ​ |  | — | ​ |  | 93,558 | ​ |  | — | ​ |  | — | ​ |  | 93,558
FHLB advances | ​ |  | — | ​ |  | 571,632 | ​ |  | 9,543 | ​ |  | 3,998,576 | ​ |  | 4,579,751
Derivatives | ​ |  | 103,900 | ​ |  | 62,860 | ​ |  | — | ​ |  | — | ​ |  | 166,760
Federal Reserve Discount Window | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,080,175 | ​ | ​ | 4,080,175
Other purposes | ​ |  | — | ​ | ​ | 18,041 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 18,041
Total pledged assets | ​ | $ | 103,900 | ​ | $ | 1,518,822 | ​ | $ | 604,736 | ​ | $ | 8,078,751 | ​ | $ | 10,306,209
(1) Balance represents market value. (2) Balance represents book value. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets as of December 31, 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.

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