SUBORDINATED DEBENTURES (Additional Information) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2003
Subordinated Borrowing [Line Items]
Subordinated Debt	$ 37,316	$ 37,425
Subordinated Debt [Member]
Subordinated Borrowing [Line Items]
Subordinated Debt	25,000	25,000
Purchase accounting premium	$ 1,918	2,023	$ 2,200
Maturity period	10 years
Subordinated debt maturity date	Oct. 15, 2025
Subordinated debt fixed interest rate	6.00%
Description of Variable Rate Basis	LIBOR plus 467 basis points
Junior subordinated debt securities [Member]
Subordinated Borrowing [Line Items]
Subordinated Debt	$ 10,310	10,310		$ 10,300
Purchase accounting premium	$ 88	$ 92	$ 100
Subordinated debt maturity date	Jun. 30, 2033
Description of Variable Rate Basis	LIBOR plus 3.15%
Basis spread variable interest rate	5.24%
London Interbank Offered Rate (LIBOR) [Member] | Subordinated Debt [Member]
Subordinated Borrowing [Line Items]
Basis spread variable interest rate	4.67%
London Interbank Offered Rate (LIBOR) [Member] | Junior subordinated debt securities [Member]
Subordinated Borrowing [Line Items]
Basis spread variable interest rate	3.15%