Investment Securities: Schedule of Available for Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017	Jun. 30, 2016
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	$ 600	$ 600
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value	600	600
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	11,036	4,698
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	11,002	4,708
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	43,596	41,404
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	43,286	41,374
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	32,394	13,739
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	32,448	13,947
Investment securities – held to maturity, at cost	87,626	60,441
Held-to-maturity Securities, Fair Value	87,336	60,629
Available-for-sale Securities	8,405	9,318
Total Investment Securities, Amortized Cost Basis	95,694	69,395	$ 69,395
Total Investment Securites	95,741	$ 69,947	69,947
Available for sale
Due in one year or less, Amortized Cost	0		0
Due after one through five years, Amortized Cost	0		0
Due after five through ten years, Amortized Cost	0		0
Due after ten years, Amortized Cost	8,068		8,954
Total investment securities, Amortized Cost	8,068		8,954
Available-for-sale Securities	8,405		9,318
Due in one year of less, Estimated Fair Value	0		0
Due after one through five years, Estimated Fair Value	0		0
Due after five through ten years, Estimated Fair Value	0		0
Due after ten years, Estimated Fair Value	$ 8,405		$ 9,318