Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Impact of Derivative Financial Instruments on Gain on Sale of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2016
Derivative [Line Items]
Total derivative financial instruments	$ (553)	$ 336	$ (921)	$ 900
Commitments to extend credit on loans to be held for sale
Derivative [Line Items]
Total derivative financial instruments	29	(1,098)	(93)	(2,309)
Mandatory loan sale commitments and TBA MBS trades
Derivative [Line Items]
Total derivative financial instruments	(582)	1,068	(791)	2,865
Option contracts
Derivative [Line Items]
Total derivative financial instruments	0	$ 366	(37)	$ 344
Other Liabilities [Member]
Derivative [Line Items]
Derivative liabilities	$ 228		$ 228		$ 38