INVESTMENT SECURITIES (Details 1) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 15,505
Due from one year to five years, Amortized Cost	56,978
Due from five to ten years, Amortized Cost	73,838
Due after ten years, Amortized Cost	43,959
Mortgage-backed securities, Amortized Cost	626,400
Amortized Cost	816,680	$ 824,635
Due in one year or less, Estimated Fair Value	15,660
Due from one year to five years, Estimated Fair Value	57,730
Due from five to ten years, Estimated Fair Value	75,578
Due after ten years, Estimated Fair Value	44,761
Mortgage-backed securities, Estimated Fair Value	624,964
Estimated Fair Value	$ 818,693	$ 822,735