LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Detail)	12 Months Ended
	Dec. 31, 2024 USD ($) borrower loan	Dec. 31, 2023 USD ($) borrower	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum percentage of loan-to-value ratio upon loan origination (no more than)	80.00%
Maximum percentage of loan-to-value ratios of the value of the real estate taken as collateral (no greater than)	85.00%
Risk review of commercial relationships with committed loan balance amount (exceeds)	$ 2,000,000.0
Amount of loans reviewed that require approval	$ 500,000
Period past due when loans are deemed impaired	90 days
Appraisals, required period interval	18 months
Minimum amount on which annual updated appraisals for criticized loans are required	$ 250,000
Percentage of strong loan-to-value	70.00%
Total nonaccrual loans	$ 24,111,000	$ 25,527,000
Loans	$ 3,931,214,000	$ 2,298,313,000
Number of borrowers experiencing financial difficulty that were given contract modifications | borrower	8	2
Loans modified as TDRs paid off | loan	3
Impact of adopting ASC 326	$ 48,689,000	$ 28,702,000		$ 25,178,000	$ 21,180,000
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Impact of adopting ASC 326			$ 2,400,000	2,423,000
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total nonaccrual loans	1,600,000	13,400,000
Impact of adopting ASC 326	42,772,000	26,077,000		21,301,000	17,943,000
Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Impact of adopting ASC 326				3,740,000
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total nonaccrual loans	5,500,000	672,000
Loans	451,384,000	340,238,000
Commercial and industrial | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Impact of adopting ASC 326	6,190,000	5,369,000		4,287,000	3,617,000
Commercial and industrial | Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Impact of adopting ASC 326				728,000
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, troubled debt restructuring	5,800,000
Commercial Real Estate | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Impact of adopting ASC 326	$ 29,551,000	$ 17,873,000		13,558,000	$ 12,037,000
Commercial Real Estate | Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Impact of adopting ASC 326				$ 2,857,000