INVESTMENT SECURITIES (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 4,028
Due from one year to five years, Amortized Cost	52,090
Due from five to ten years, Amortized Cost	51,887
Due after ten years, Amortized Cost	60,758
Mortgage-backed Securities, Amortized Cost	657,764
Amortized Cost	826,527	$ 778,261	$ 600,744
Due in one year or less,Fair Value	4,060
Due from one year to five years, Fair Value	53,677
Due from five to ten years, Fair Value	53,967
Due after ten years, Fair Value	61,979
Mortgage-backed securities, Fair Value	663,420
Total Fair Value	$ 837,103	$ 783,185	$ 610,330