INVESTMENT SECURITIES, Analysis of Gross Unrealized Losses (Details) $ in Thousands	Mar. 31, 2017 USD ($) Security	Dec. 31, 2016 USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 237,725	$ 220,824
Less than 12 months, unrealized losses	(3,235)	(3,263)
12 months or more, fair value	7,300	5,825
12 Months or more, unrealized losses	(83)	(89)
Total fair value	245,025	226,649
Total unrealized losses	$ (3,318)	(3,352)
Investment securities in unrealized loss position less than 12 months | Security	164
Investment securities in unrealized loss position more than 12 months | Security	13
Investment securities pledged as collateral	$ 36,473	38,152
U.S. Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	28,608	23,564
Less than 12 months, unrealized losses	(91)	(88)
12 months or more, fair value	0	0
12 Months or more, unrealized losses	0	0
Total fair value	28,608	23,564
Total unrealized losses	(91)	(88)
Securities of U.S. Government Agencies and Corporations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	19,221	22,195
Less than 12 months, unrealized losses	(155)	(187)
12 months or more, fair value	0	0
12 Months or more, unrealized losses	0	0
Total fair value	19,221	22,195
Total unrealized losses	(155)	(187)
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	15,971	16,168
Less than 12 months, unrealized losses	(147)	(245)
12 months or more, fair value	996	996
12 Months or more, unrealized losses	(5)	(8)
Total fair value	16,967	17,164
Total unrealized losses	(152)	(253)
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	47,541	49,805
Less than 12 months, unrealized losses	(1,013)	(1,065)
12 months or more, fair value	0	0
12 Months or more, unrealized losses	0	0
Total fair value	47,541	49,805
Total unrealized losses	(1,013)	(1,065)
Mortgage-backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	126,384	109,092
Less than 12 months, unrealized losses	(1,829)	(1,678)
12 months or more, fair value	6,304	4,829
12 Months or more, unrealized losses	(78)	(81)
Total fair value	132,688	113,921
Total unrealized losses	$ (1,907)	$ (1,759)