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COMMITMENTS AND CONTINGENCIES (Tables) | 3 Months Ended
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Mar. 31, 2024
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, 2024 |  | December 31, 2023
Commitments with off-balance sheet risk: |  | ​ |  |  | ​ |
Commitments to extend credit(1) | ​ | $ | 5,865,505 | ​ | $ | 5,961,238
Letters of credit | ​ |  | 126,106 | ​ |  | 140,498
Total commitments with off-balance sheet risk | ​ | $ | 5,991,611 | ​ | $ | 6,101,736
(1) Includes unfunded overdraft protection.
Schedule of Pledged Assets, Not Separately Reported on Statement of Financial Position | As part of the Company’s liquidity management strategy, the Company pledges collateral to secure various financing and other activities that occur during the normal course of business. The following tables present the types of collateral pledged as of the periods ended (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets as of March 31, 2024 | ​ | ​ | ​
​ |  | ​ | ​ |  | AFS |  | HTM |  | ​ | ​ |  | ​ | ​
​ | ​ | Cash | ​ | Securities (1) | ​ | Securities (1) | ​ | Loans (2) | ​ | Total
Public deposits | ​ | $ | — | ​ | $ | 754,132 | ​ | $ | 615,378 | ​ | $ | — | ​ | $ | 1,369,510
Repurchase agreements | ​ |  | — | ​ |  | 199,975 | ​ |  | — | ​ |  | — | ​ |  | 199,975
FHLB advances | ​ |  | — | ​ |  | 46,448 | ​ |  | — | ​ |  | 3,244,890 | ​ |  | 3,291,338
Derivatives | ​ |  | 156,891 | ​ |  | 60,868 | ​ |  | — | ​ |  | — | ​ |  | 217,759
Federal Reserve Discount Window | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 394,700 | ​ | ​ | 394,700
Other purposes | ​ |  | — | ​ | ​ | 16,836 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 16,836
Total pledged assets | ​ | $ | 156,891 | ​ | $ | 1,078,259 | ​ | $ | 615,378 | ​ | $ | 3,639,590 | ​ | $ | 5,490,118
(1) Balance represents market value. (2) Balance represents book value. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets as of December 31, 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 BTFP program.

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