INVESTMENT SECURITIES, Contractual and Expected Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Maturity in years [Abstract]
Due in one year or less	$ 32,376
Due after one year through five years	42,042
Due after five years through ten years	6,957
Due after ten years	0
Subtotal	81,375
MBS & CMO	225,619
Amortized cost	306,994	$ 279,875
Maturity in years [Abstract]
Due in one year or less	32,341
Due after one year through five years	41,811
Due after five years through ten years	7,130
Due after ten years	0
Subtotal	81,282
MBS & CMO	223,105
Estimated fair value	$ 304,387	$ 277,079