Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Carrying Values and Estimated Fair Values of the Company's Financial Instruments) (Details)

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FAIR VALUE MEASUREMENTS (Carrying Values and Estimated Fair Values of the Company's Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
ASSETS    
Cash and cash equivalents $ 396,670 $ 378,131
AFS Securities 2,202,216 2,231,261
HTM securities 791,345 808,074
Restricted stock 110,272 115,472
LHFS 12,200 6,710
LHFI, net of deferred fees and costs 15,235,459 15,148,256
Financial Derivatives 99,259 93,027
Accrued interest receivable 90,299 91,370
Bank owned life insurance 455,885 452,565
LIABILITIES    
Deposits 17,254,950 16,799,791
Borrowings 990,347 1,154,694
Accrued interest payable 26,175 20,528
Financial Derivatives 226,777 206,561
Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Cash and cash equivalents 396,670 378,131
AFS Securities 60,868 61,311
HTM securities 0 0
Restricted stock 0 0
LHFS 0 0
LHFI, net of deferred fees and costs 0 0
Financial Derivatives 0 0
Accrued interest receivable 0 0
Bank owned life insurance 0 0
LIABILITIES    
Deposits 0 0
Borrowings 0 0
Accrued interest payable 0 0
Financial Derivatives 0 0
Significant Other Observable Inputs Level 2    
ASSETS    
Cash and cash equivalents 0 0
AFS Securities 2,141,348 2,169,950
HTM securities 790,123 806,834
Restricted stock 110,272 115,472
LHFS 12,200 6,710
LHFI, net of deferred fees and costs 0 0
Financial Derivatives 99,259 93,027
Accrued interest receivable 90,299 91,370
Bank owned life insurance 455,885 452,565
LIABILITIES    
Deposits 17,254,950 16,799,791
Borrowings 990,347 1,154,694
Accrued interest payable 26,175 20,528
Financial Derivatives 226,777 206,561
Significant Unobservable Inputs Level 3    
ASSETS    
Cash and cash equivalents 0 0
AFS Securities 0 0
HTM securities 1,222 1,240
Restricted stock 0 0
LHFS 0 0
LHFI, net of deferred fees and costs 15,235,459 15,148,256
Financial Derivatives 0 0
Accrued interest receivable 0 0
Bank owned life insurance 0 0
LIABILITIES    
Deposits 0 0
Borrowings 0 0
Accrued interest payable 0 0
Financial Derivatives 0 0
Carrying Value    
ASSETS    
Cash and cash equivalents 396,670 378,131
AFS Securities 2,202,216 2,231,261
HTM securities 828,928 837,378
Restricted stock 110,272 115,472
LHFS 12,200 6,710
LHFI, net of deferred fees and costs 15,851,628 15,635,043
Financial Derivatives 99,259 93,027
Accrued interest receivable 90,299 91,370
Bank owned life insurance 455,885 452,565
LIABILITIES    
Deposits 17,278,435 16,818,129
Borrowings 1,057,724 1,311,858
Accrued interest payable 26,175 20,528
Financial Derivatives $ 226,777 $ 206,561