INVESTMENT SECURITIES, Contractual and Expected Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Maturity in years [Abstract]
Due in one year or less	$ 28,548
Due after one year through five years	45,642
Due after five years through ten years	7,356
Due after ten years	0
Subtotal	81,546
MBS & CMO	214,661
Amortized cost	296,207	$ 279,875
Maturity in years [Abstract]
Due in one year or less	28,535
Due after one year through five years	45,378
Due after five years through ten years	7,508
Due after ten years	0
Subtotal	81,421
MBS & CMO	212,022
Estimated fair value	$ 293,443	$ 277,079