REGULATORY MATTERS - Summary of Commitments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Commercial Letters Of Credit [Member]
Other Commitments [Line Items]
Commitmets to extend credit	$ 151,140	$ 135,987
Standby letters of credit [Member] [Member]
Other Commitments [Line Items]
Commitmets to extend credit	4,342	4,964
Commercial lines of credit [Member]
Other Commitments [Line Items]
Commitmets to extend credit	725,259	759,947
Unused personal lines of credit [Member]
Other Commitments [Line Items]
Commitmets to extend credit	1,180,824	1,180,860
Construction undisbursed funds [Member]
Other Commitments [Line Items]
Commitmets to extend credit	$ 197,917	$ 119,900