SECURITIES (Details 1) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Amortized Cost, Available for sale:
Within one year	$ 8,897
One to five years	97,886
Five to ten years	130,905
Beyond ten years	564,744
Total	802,432	$ 834,564
Estimated Fair Value, Available for sale:
Within one year	8,900
One to five years	97,300
Five to ten years	128,893
Beyond ten years	556,965
Estimated Fair Value	792,058	819,722
Amortized Cost, Held to maturity:
Within one year	3,537
One to five years	36,367
Five to ten years	55,308
Beyond ten years	94,391
Total	189,603	223,237
Estimated Fair Value, Held to maturity:
Within one year	3,534
One to five years	36,634
Five to ten years	56,280
Beyond ten years	93,657
Estimated Fair Value	$ 190,105	$ 222,878