Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Allowance for Loan Losses of Undisbursed Funds and Commitments on Loans Held for Investment (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
Allowance for Loan and Lease Losses [Roll Forward]
Allowance at beginning of period	$ 8,063	$ 8,725	$ 8,039	$ 8,670
Recovery from the allowance for loan losses	(11)	(350)	(158)	500
Balance at end of period	8,075	8,391	8,075	8,391
Commitments to Extend Credit and Undisbursed Funds
Allowance for Loan and Lease Losses [Roll Forward]
Allowance at beginning of period	213	173	277	204
Recovery from the allowance for loan losses	(25)	0	(89)	(31)
Balance at end of period	188	$ 173	188	$ 173
Other Liabilities [Member]
Derivative [Line Items]
Derivative Liability	$ 228		$ 228		$ 38