FAIR VALUE MEASUREMENTS - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements Disclosure [Line Items]
Percentage of securities using market-based information	100.00%
Collateral dependent loans, allowance for credit loss	$ 8,200,000
Provision for fair value measurements included in allowance for loan losses	$ 49,300,000
Short-term borrowings approximate fair value for amounts that mature, days, less than	90 days
Fair value, measurements, recurring
Fair Value Measurements Disclosure [Line Items]
Transfer from level 3	$ 0	$ 1,000,000
Fair value, measurements, recurring | Other debt securities
Fair Value Measurements Disclosure [Line Items]
Transfer from level 3		1,000,000
Fair value, measurements, nonrecurring
Fair Value Measurements Disclosure [Line Items]
Collateral dependent loans carrying value	35,000,000
Indirect installment loans held for sale	338,300,000
Indirect installment loans held for sale, valuation allowance	16,700,000
Carrying amount of OREO	2,000,000
Valuation allowance of OREO	300,000
Loss from OREO included in earnings	700,000
Mortgage Servicing Rights | Fair value, measurements, nonrecurring
Fair Value Measurements Disclosure [Line Items]
Servicing asset	12,400,000
Valuation allowance for impairment of recognized servicing assets	200,000
Mortgage Servicing Rights | Fair value, measurements, nonrecurring | Provision Expense
Fair Value Measurements Disclosure [Line Items]
Valuation allowance for impairment of recognized servicing assets, provision	200,000
SBA-Guaranteed Loan Servicing | Fair value, measurements, nonrecurring
Fair Value Measurements Disclosure [Line Items]
Servicing asset	1,400,000
Valuation allowance for impairment of recognized servicing assets	1,200,000	$ 1,600,000
Valuation allowance for impairment of recognized servicing assets, recoveries	400,000
Minimum | Commercial Loan
Fair Value Measurements Disclosure [Line Items]
Financing receivable, individual reserves in default, threshold	1,000,000
Maximum | Commercial and Consumer Loans
Fair Value Measurements Disclosure [Line Items]
Financing receivable, individual reserves in default, threshold	$ 1,000,000