Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Schedule of Securities Pledged as Collateral) (Details)

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COMMITMENTS AND CONTINGENCIES (Schedule of Securities Pledged as Collateral) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
AFS Securities $ 2,084,928 $ 2,741,816
HTM securities 762,046 801,887
Loans 15,157,993 14,338,374
Total assets 20,736,236 20,461,138
Asset Pledged as Collateral [Member]    
Cash 210,977 196,180
AFS Securities 1,347,145 993,446
HTM securities 596,616 580,415
Loans 3,525,746 3,137,996
Total assets 5,680,484 4,908,037
Public deposits | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 686,217 713,761
HTM securities 580,172 579,550
Loans 0 0
Total assets 1,266,389 1,293,311
Repurchase agreements | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 142,537 159,221
HTM securities 0 0
Loans 0 0
Total assets 142,537 159,221
FHLB advances | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 51,084 36,039
HTM securities 0 0
Loans 3,073,097 2,679,316
Total assets 3,124,181 2,715,355
Derivatives | Asset Pledged as Collateral [Member]    
Cash 210,977 196,180
AFS Securities 59,568 57,114
HTM securities 0 0
Loans 0 0
Total assets 270,545 253,294
Fed Funds | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 392,491 0
HTM securities 16,444 0
Loans 452,649 458,680
Total assets 861,584 458,680
Other purposes | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 15,248 27,311
HTM securities 0 865
Loans 0 0
Total assets $ 15,248 $ 28,176