INVESTMENT SECURITIES (Details 1) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 5,260
Due from one year to five years, Amortized Cost	63,450
Due from five to ten years, Amortized Cost	56,521
Due after ten years, Amortized Cost	54,775
Mortgage-backed Securities, Amortized Cost	641,404
Amortized Cost	821,410	$ 778,261	$ 804,680
Due in one year or less,Fair Value	5,312
Due from one year to five years, Fair Value	65,135
Due from five to ten years, Fair Value	59,169
Due after ten years, Fair Value	56,504
Mortgage-backed securities, Fair Value	652,004
Total Fair Value	$ 838,124	$ 783,185	$ 811,385