GOODWILL AND OTHER INTANGIBLES - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 28,100		$ 28,100
Amortization expense	799	$ 1,006
Core Deposits [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	51,664		51,664
Amortization expense	200	400
Customer Relationships [Member] | Credit Card [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense	500	600
Customer Relationships [Member] | Insurance Customer Intangible [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	1,067		$ 1,067
Amortization expense	$ 38	$ 38