INVESTMENT SECURITIES (Details 2) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 492,765	$ 480,324
12 Months or More, Fair Value	11,630	12,284
Total Fair Value	504,395	492,608
Less Than 12 Months, Unrealized Losses	(7,081)	(7,009)
12 Months or More, Unrealized Losses	(362)	(384)
Total Unrealized Losses	(7,443)	(7,393)
US Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	0	0
12 Months or More, Fair Value	0	0
Total Fair Value	0	0
Less Than 12 Months, Unrealized Losses	0	0
12 Months or More, Unrealized Losses	0	0
Total Unrealized Losses	0	0
State, county and municipal securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	38,520	47,647
12 Months or More, Fair Value	0	0
Total Fair Value	38,520	47,647
Less Than 12 Months, Unrealized Losses	(315)	(469)
12 Months or More, Unrealized Losses	0	0
Total Unrealized Losses	(315)	(469)
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	18,430	18,377
12 Months or More, Fair Value	492	493
Total Fair Value	18,922	18,870
Less Than 12 Months, Unrealized Losses	(263)	(363)
12 Months or More, Unrealized Losses	(8)	(7)
Total Unrealized Losses	(271)	(370)
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	435,815	414,300
12 Months or More, Fair Value	11,138	11,791
Total Fair Value	446,953	426,091
Less Than 12 Months, Unrealized Losses	(6,503)	(6,177)
12 Months or More, Unrealized Losses	(354)	(377)
Total Unrealized Losses	$ (6,857)	$ (6,554)