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COMMITMENTS AND CONTINGENCIES (Tables) | 6 Months Ended
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Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract] |
Balances of Commitments and Contingencies | The following table presents the balances of commitments and contingencies (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2020 |  | December 31, 2019
Commitments with off-balance sheet risk: |  | ​ |  |  | ​ |
Commitments to extend credit (1) | ​ | $ | 4,968,910 | ​ | $ | 4,691,272
Standby letters of credit | ​ |  | 161,958 | ​ |  | 209,658
Total commitments with off-balance sheet risk | ​ | $ | 5,130,868 | ​ | $ | 4,900,930
(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, it 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, at June 30, 2020 and December 31, 2019 (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets as of June 30, 2020 | ​ | ​ | ​
​ |  | ​ | ​ |  | AFS |  | HTM |  | ​ | ​ |  | ​ | ​
​ | ​ | Cash | ​ | Securities (1) | ​ | Securities (1) | ​ | Loans (2) | ​ | Total
Public deposits | ​ | $ | — | ​ | $ | 454,733 | ​ | $ | 432,310 | ​ | $ | — | ​ | $ | 887,043
Repurchase agreements | ​ |  | — | ​ |  | 93,551 | ​ |  | — | ​ |  | — | ​ |  | 93,551
FHLB advances | ​ |  | — | ​ |  | 57,534 | ​ |  | — | ​ |  | 4,193,380 | ​ |  | 4,250,914
Derivatives | ​ |  | 271,551 | ​ |  | 1,033 | ​ |  | — | ​ |  | — | ​ |  | 272,584
Fed Funds | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 319,068 | ​ | ​ | 319,068
PPP Loans | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 189,941 | ​ | ​ | 189,941
Other purposes | ​ |  | — | ​ | ​ | 127,384 | ​ | ​ | 8,901 | ​ | ​ | — | ​ | ​ | 136,285
Total pledged assets | ​ | $ | 271,551 | ​ | $ | 734,235 | ​ | $ | 441,211 | ​ | $ | 4,702,389 | ​ | $ | 6,149,386
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) Balance represents market value. | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(2) Balance represents book value. | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pledged Assets as of December 31, 2019 | ​ | ​ | ​
​ |  | ​ | ​ |  | AFS |  | HTM |  | ​ | ​ |  | ​ | ​
​ | ​ | Cash | ​ | Securities (1) | ​ | Securities (1) | ​ | Loans (2) | ​ | Total
Public deposits | ​ | $ | — | ​ | $ | 467,266 | ​ | $ | 292,096 | ​ | $ | — | ​ | $ | 759,362
Repurchase agreements | ​ |  | — | ​ |  | 79,299 | ​ |  | 7,602 | ​ |  | — | ​ |  | 86,901
FHLB advances | ​ |  | — | ​ |  | 63,812 | ​ |  | — | ​ |  | 3,846,934 | ​ |  | 3,910,746
Derivatives | ​ |  | 116,839 | ​ |  | 1,260 | ​ |  | — | ​ |  | — | ​ |  | 118,099
Fed Funds | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 292,738 | ​ | ​ | 292,738
Other purposes | ​ |  | — | ​ |  | 122,358 | ​ |  | 10,654 | ​ |  | — | ​ |  | 133,012
Total pledged assets | ​ | $ | 116,839 | ​ | $ | 733,995 | ​ | $ | 310,352 | ​ | $ | 4,139,672 | ​ | $ | 5,300,858
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) Balance represents book value. | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(2) Balance represents market value. | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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