FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Summary Of Financial Instruments With Off-Balance Sheet Credit Risk (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total commitments to extend credit and available credit lines	$ 3,729,119	$ 3,320,157
Commercial real estate development and construction
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total commitments to extend credit and available credit lines	621,725	871,290
Residential real estate-development and construction
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total commitments to extend credit and available credit lines	885,806	94,096
Real estate-residential mortgage
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total commitments to extend credit and available credit lines	54,072	335,288
Lines of credit, principally home equity and business lines
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total commitments to extend credit and available credit lines	2,096,874	1,947,706
Standby letters of credit
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total commitments to extend credit and available credit lines	$ 70,642	$ 71,777