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
Mar. 31, 2023
Dec. 31, 2022
AFS Securities $ 2,252,365 $ 2,741,816
HTM securities 823,099 801,887
Loans 14,467,768 14,338,374
Total assets 20,103,370 20,461,138
Asset Pledged as Collateral [Member]    
Cash 162,329 196,180
AFS Securities 1,540,764 993,446
HTM securities 641,282 580,415
Loans 3,083,842 3,137,996
Total assets 5,428,217 4,908,037
Public deposits | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 778,257 713,761
HTM securities 623,009 579,550
Loans 0 0
Total assets 1,401,266 1,293,311
Repurchase agreements | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 181,670 159,221
HTM securities 0 0
Loans 0 0
Total assets 181,670 159,221
FHLB advances | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 58,078 36,039
HTM securities 0 0
Loans 2,598,273 2,679,316
Total assets 2,656,351 2,715,355
Derivatives | Asset Pledged as Collateral [Member]    
Cash 162,329 196,180
AFS Securities 58,405 57,114
HTM securities 0 0
Loans 0 0
Total assets 220,734 253,294
Fed Funds | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 440,955 0
HTM securities 18,273 0
Loans 485,569 458,680
Total assets 944,797 458,680
Other purposes | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 23,399 27,311
HTM securities 0 865
Loans 0 0
Total assets $ 23,399 $ 28,176