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, 2022
Dec. 31, 2021
AFS Securities $ 2,717,323 $ 3,481,650
HTM securities 765,480 693,774
Loans 13,810,711 13,096,056
Total assets 19,950,231 20,064,796
Asset Pledged as Collateral [Member]    
Cash 237,546 82,299
AFS Securities 847,751 964,484
HTM securities 484,118 473,228
Loans 3,025,583 4,655,326
Total assets 4,594,998 6,175,337
Public deposits | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 576,066 703,489
HTM securities 483,284 472,243
Loans 0 0
Total assets 1,059,350 1,175,732
Repurchase agreements | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 151,237 130,217
HTM securities 0 0
Loans 0 0
Total assets 151,237 130,217
FHLB advances | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 37,188 43,722
HTM securities 0 0
Loans 2,545,915 4,263,259
Total assets 2,583,103 4,306,981
Derivatives | Asset Pledged as Collateral [Member]    
Cash 237,546 82,299
AFS Securities 56,593 65,053
HTM securities 0 0
Loans 0 0
Total assets 294,139 147,352
Fed Funds | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 0 0
HTM securities 0 0
Loans 479,668 392,067
Total assets 479,668 392,067
Other purposes | Asset Pledged as Collateral [Member]    
Cash 0 0
AFS Securities 26,667 22,003
HTM securities 834 985
Loans 0 0
Total assets $ 27,501 $ 22,988