GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail) - USD ($)		3 Months Ended			9 Months Ended
	Aug. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 37,144,000			$ 37,144,000		$ 37,144,000
Goodwill impairment	$ 0
Amortization of intangible assets		$ 353,000	$ 430,000	$ 500,000	$ 1,212,000	$ 1,741,000
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period					4 years 1 month 6 days
Core deposit intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets					4 years
Core deposit intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets					10 years