INVESTMENT SECURITIES, Analysis of Gross Unrealized Losses (Details) $ in Thousands	Mar. 31, 2019 USD ($) Security	Dec. 31, 2018 USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 10,669	$ 74,186
Less than 12 months, unrealized losses	(20)	(237)
12 months or more, fair value	202,050	187,203
12 Months or more, unrealized losses	(4,333)	(5,653)
Total fair value	212,719	261,389
Total unrealized losses	$ (4,353)	(5,890)
Investment securities in unrealized loss position less than 12 months | Security	20
Investment securities in unrealized loss position more than 12 months | Security	205
Investment securities pledged as collateral	$ 34,363	36,781
U.S. Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	4,996	37,805
Less than 12 months, unrealized losses	(2)	(67)
12 months or more, fair value	15,407	5,951
12 Months or more, unrealized losses	(98)	(90)
Total fair value	20,403	43,756
Total unrealized losses	(100)	(157)
Securities of U.S. Government Agencies and Corporations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	998	16,959
Less than 12 months, unrealized losses	(1)	(39)
12 months or more, fair value	20,576	13,540
12 Months or more, unrealized losses	(153)	(189)
Total fair value	21,574	30,499
Total unrealized losses	(154)	(228)
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	698	847
Less than 12 months, unrealized losses	(1)	(2)
12 months or more, fair value	8,591	9,134
12 Months or more, unrealized losses	(71)	(121)
Total fair value	9,289	9,981
Total unrealized losses	(72)	(123)
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	2,048	2,217
Less than 12 months, unrealized losses	(2)	(6)
12 months or more, fair value	51,133	53,217
12 Months or more, unrealized losses	(1,445)	(1,844)
Total fair value	53,181	55,434
Total unrealized losses	(1,447)	(1,850)
Mortgage-backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	1,929	16,358
Less than 12 months, unrealized losses	(14)	(123)
12 months or more, fair value	106,343	105,361
12 Months or more, unrealized losses	(2,566)	(3,409)
Total fair value	108,272	121,719
Total unrealized losses	$ (2,580)	$ (3,532)