INVESTMENT SECURITIES, Analysis of Gross Unrealized Losses (Details) $ in Thousands	Jun. 30, 2017 USD ($) Security	Dec. 31, 2016 USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 238,302	$ 220,824
Less than 12 months, unrealized losses	(2,757)	(3,263)
12 months or more, fair value	19,204	5,825
12 Months or more, unrealized losses	(348)	(89)
Total fair value	257,506	226,649
Total unrealized losses	$ (3,105)	(3,352)
Investment securities in unrealized loss position less than 12 months | Security	170
Investment securities in unrealized loss position more than 12 months | Security	90
Investment securities pledged as collateral	$ 34,406	38,152
U.S. Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	28,566	23,564
Less than 12 months, unrealized losses	(94)	(88)
12 months or more, fair value	0	0
12 Months or more, unrealized losses	0	0
Total fair value	28,566	23,564
Total unrealized losses	(94)	(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	20,215	22,195
Less than 12 months, unrealized losses	(154)	(187)
12 months or more, fair value	0	0
12 Months or more, unrealized losses	0	0
Total fair value	20,215	22,195
Total unrealized losses	(154)	(187)
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	16,860	16,168
Less than 12 months, unrealized losses	(110)	(245)
12 months or more, fair value	993	996
12 Months or more, unrealized losses	(4)	(8)
Total fair value	17,853	17,164
Total unrealized losses	(114)	(253)
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	55,931	49,805
Less than 12 months, unrealized losses	(940)	(1,065)
12 months or more, fair value	0	0
12 Months or more, unrealized losses	0	0
Total fair value	55,931	49,805
Total unrealized losses	(940)	(1,065)
Mortgage-backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	116,730	109,092
Less than 12 months, unrealized losses	(1,459)	(1,678)
12 months or more, fair value	18,211	4,829
12 Months or more, unrealized losses	(344)	(81)
Total fair value	134,941	113,921
Total unrealized losses	$ (1,803)	$ (1,759)