INVESTMENT SECURITIES (Details 2) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	$ 389,576	$ 480,324
12 Months or More, Estimated Fair Value	26,572	12,284
Total Estimated Fair Value	416,148	492,608
Less Than 12 Months, Unrealized Losses	(3,964)	(7,009)
12 Months or More, Unrealized Losses	(578)	(384)
Total Unrealized Losses	(4,542)	(7,393)
U.S. government sponsored agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	0	0
12 Months or More, Estimated Fair Value	0	0
Total Estimated 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, Estimated Fair Value	13,920	47,647
12 Months or More, Estimated Fair Value	0	0
Total Estimated Fair Value	13,920	47,647
Less Than 12 Months, Unrealized Losses	(86)	(469)
12 Months or More, Unrealized Losses	0	0
Total Unrealized Losses	(86)	(469)
Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	18,966	18,377
12 Months or More, Estimated Fair Value	490	493
Total Estimated Fair Value	19,456	18,870
Less Than 12 Months, Unrealized Losses	(182)	(363)
12 Months or More, Unrealized Losses	(10)	(7)
Total Unrealized Losses	(192)	(370)
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	356,690	414,300
12 Months or More, Estimated Fair Value	26,082	11,791
Total Estimated Fair Value	382,772	426,091
Less Than 12 Months, Unrealized Losses	(3,696)	(6,177)
12 Months or More, Unrealized Losses	(568)	(377)
Total Unrealized Losses	$ (4,264)	$ (6,554)