INVESTMENT SECURITIES: Investments Classified by Contractual Maturity Date (Details 1) $ in Thousands	Mar. 31, 2018 USD ($)
Available for sale:
Due in one year or less, Amortized Cost	$ 10,000
Due in one year or less, Estimated Fair Value	9,964
Due after one year through five years, Amortized Cost	8,421
Due after one year through five years, Estimated Fair Value	8,366
Due after five years through ten years, Amortized Cost	43,846
Due after five years through ten years, Estimated Fair Value	42,525
Due after ten years, Amortized Cost	157,160
Due after ten years, Estimated Fair Value	152,366
Total, Amortized Cost	219,427
Total, Estimated Fair Value	213,221
Held to maturity:
Due in one year or less, Amortized Cost	0
Due in one year or less, Estimated Fair Value	0
Due after one year through five years, Amortized Cost	6
Due after one year through five years, Estimated Fair Value	6
Due after five years through ten years, Amortized Cost	32
Due after five years through ten years, Estimated Fair Value	32
Due after ten years, Amortized Cost	4
Due after ten years, Estimated Fair Value	5
Total, Amortized Cost	42
Total, Estimated Fair Value	$ 43