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, 2023
Dec. 31, 2022
ASSETS    
Cash and cash equivalents $ 372,196 $ 319,948
Securities available for sale, at fair value 2,252,365 2,741,816
HTM securities 823,099 801,887
Restricted stock 87,616 120,213
LHFS 14,213 3,936
LHFI, net of deferred fees and costs 14,200,627 13,974,926
Financial Derivatives 73,730 80,310
Accrued interest receivable 78,088 81,953
Bank owned life insurance 443,537 440,656
LIABILITIES    
Deposits 16,455,439 15,927,361
Borrowings 735,301 1,645,095
Accrued interest payable 10,392 5,268
Financial Derivatives 197,533 236,000
Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Cash and cash equivalents 372,196 319,948
Securities available for sale, at fair value 57,906 56,606
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
Securities available for sale, at fair value 2,194,459 2,685,210
HTM securities 820,007 798,778
Restricted stock 87,616 120,213
LHFS 14,213 3,936
LHFI, net of deferred fees and costs 0 0
Financial Derivatives 73,730 80,310
Accrued interest receivable 78,088 81,953
Bank owned life insurance 443,537 440,656
LIABILITIES    
Deposits 16,455,439 15,927,361
Borrowings 735,301 1,645,095
Accrued interest payable 10,392 5,268
Financial Derivatives 197,533 236,000
Significant Unobservable Inputs Level 3    
ASSETS    
Cash and cash equivalents 0 0
Securities available for sale, at fair value 0 0
HTM securities 3,092 3,109
Restricted stock 0 0
LHFS 0 0
LHFI, net of deferred fees and costs 14,200,627 13,974,926
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 372,196 319,948
Securities available for sale, at fair value 2,252,365 2,741,816
HTM securities 855,418 847,732
Restricted stock 87,616 120,213
LHFS 14,213 3,936
LHFI, net of deferred fees and costs 14,584,280 14,449,142
Financial Derivatives 73,730 80,310
Accrued interest receivable 78,088 81,953
Bank owned life insurance 443,537 440,656
LIABILITIES    
Deposits 16,455,910 15,931,677
Borrowings 798,910 1,708,700
Accrued interest payable 10,392 5,268
Financial Derivatives $ 197,533 $ 236,000