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
Sep. 30, 2024
Dec. 31, 2023
ASSETS    
Cash and cash equivalents $ 528,070 $ 378,131
AFS Securities 2,608,182 2,231,261
HTM securities 776,827 808,074
Restricted stock 117,881 115,472
LHFS 11,078 6,710
LHFI, net of deferred fees and costs 17,721,302 15,148,256
Financial Derivatives 91,418 93,027
Accrued interest receivable 93,603 91,370
Bank owned life insurance 489,759 452,565
LIABILITIES    
Deposits 20,310,505 16,799,791
Borrowings 787,333 1,154,694
Accrued interest payable 26,751 20,528
Financial Derivatives 170,118 206,561
Fair Value, Inputs, Level 1 [Member]    
ASSETS    
Cash and cash equivalents 528,070 378,131
AFS Securities 62,683 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
Fair Value, Inputs, Level 2 [Member]    
ASSETS    
Cash and cash equivalents 0 0
AFS Securities 2,545,499 2,169,950
HTM securities 775,630 806,834
Restricted stock 117,881 115,472
LHFS 11,078 6,710
LHFI, net of deferred fees and costs 0 0
Financial Derivatives 91,418 93,027
Accrued interest receivable 93,603 91,370
Bank owned life insurance 489,759 452,565
LIABILITIES    
Deposits 20,310,505 16,799,791
Borrowings 787,333 1,154,694
Accrued interest payable 26,751 20,528
Financial Derivatives 170,118 206,561
Fair Value, Inputs, Level 3 [Member]    
ASSETS    
Cash and cash equivalents 0 0
AFS Securities 0 0
HTM securities 1,197 1,240
Restricted stock 0 0
LHFS 0 0
LHFI, net of deferred fees and costs 17,721,302 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
Reported Value Measurement [Member]    
ASSETS    
Cash and cash equivalents 528,070 378,131
AFS Securities 2,608,182 2,231,261
HTM securities 807,080 837,378
Restricted stock 117,881 115,472
LHFS 11,078 6,710
LHFI, net of deferred fees and costs 18,337,299 15,635,043
Financial Derivatives 91,418 93,027
Accrued interest receivable 93,603 91,370
Bank owned life insurance 489,759 452,565
LIABILITIES    
Deposits 20,305,287 16,818,129
Borrowings 852,164 1,311,858
Accrued interest payable 26,751 20,528
Financial Derivatives $ 170,118 $ 206,561