LOANS - Summarizes Changes in Total Contractually Required Principal and Interest Cash Payments (Details) - Purchased Credit Impaired Loan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 13,132	$ 13,652	$ 12,996	$ 12,109
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	10,443	13,057	10,443	13,057
Accretable yield [Member]
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	3,265	4,674	3,807	2,610
Additions	0	0	0	2,094
Deletions	0	0	(10)	(15)
Accretion	(357)	(492)	(1,173)	(1,499)
Reclassifications from nonaccretable difference	407	0	691	992
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	3,315	4,182	3,315	4,182
Recorded investment of acquired loans [Member]
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	13,132	13,652	12,996	12,109
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	10,443	13,057	10,443	13,057
Allowance for loan losses [Member]
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0		0	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 0	$ 0	$ 0	$ 0