DEPOSITS - Summary of Deposits Balance (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Minimum [Member]
Deposits [Line Items]
Interest-bearing savings accounts	0.05%	0.05%
Interest-bearing checking accounts	0.05%	0.05%
Certificates of deposit	0.10%	0.10%
Brokered certificates of deposit	0.85%	1.20%
Maximum [Member]
Deposits [Line Items]
Interest-bearing savings accounts	1.40%	2.00%
Interest-bearing checking accounts	1.75%	1.00%
Certificates of deposit	4.75%	4.00%
Brokered certificates of deposit	2.75%	3.00%