Fair Value of Financial Instruments: Schedule of Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Using Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 8,083		$ 8,703		$ 7,830	$ 9,561
Total gains or losses included in earnings	47		(1,121)		(157)	(2,321)
Total gains or losses included in other comprehensive loss	(2)		(5)		(4)	(9)
Purchases	0		94		0	138
Issuances	0		0		0	0
Settlements	(1,834)		(760)		(1,897)	(1,218)
Transfers in and/or out of Level 3	0		824		522	1,584
Ending balance	6,294		7,735		6,294	7,735
Private issue CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	448		560		461	601
Total gains or losses included in earnings	0		0		0	0
Total gains or losses included in other comprehensive loss	0		0		1	1
Purchases	0		0		0	0
Issuances	0		0		0	0
Settlements	(29)		(22)		(43)	(64)
Transfers in and/or out of Level 3	0		0		0	0
Ending balance	419		538		419	538
Loans Held For Investment, at Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	6,924		5,529		6,445	5,159
Total gains or losses included in earnings	38		(139)		46	(101)
Total gains or losses included in other comprehensive loss	0		0		0	0
Purchases	0		0		0	0
Issuances	0		0		0	0
Settlements	(1,805)		(250)		(1,856)	(678)
Transfers in and/or out of Level 3	0		824		522	1,584
Ending balance	5,157		5,964		5,157	5,964
Interest-Only Strips
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	28		42		31	47
Total gains or losses included in earnings	0		0		0	0
Total gains or losses included in other comprehensive loss	(2)		(5)		(5)	(10)
Purchases	0		0		0	0
Issuances	0		0		0	0
Settlements	0		0		0	0
Transfers in and/or out of Level 3	0		0		0	0
Ending balance	26		37		26	37
Loan Commitments to Originate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	687	[1]	2,574	[2]	809	3,785
Total gains or losses included in earnings	29	[1]	(1,098)	[2]	(93)	(2,309)
Total gains or losses included in other comprehensive loss	0	[1]	0	[2]	0	0
Purchases	0	[1]	0	[2]	0	0
Issuances	0	[1]	0	[2]	0	0
Settlements	0	[1]	0	[2]	0	0
Transfers in and/or out of Level 3	0	[1]	0	[2]	0	0
Ending balance	716		1,476		716	1,476
Mandatory Commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(4)	[3]	(24)	[4]	47	(31)
Total gains or losses included in earnings	(20)	[3]	(250)	[4]	(73)	(255)
Total gains or losses included in other comprehensive loss	0	[3]	0	[4]	0	0
Purchases	0	[3]	0	[4]	0	0
Issuances	0	[3]	0	[4]	0	0
Settlements	0	[3]	(6)	[4]	2	6
Transfers in and/or out of Level 3	0	[3]	0	[4]	0	0
Ending balance	(24)		(280)		(24)	(280)
Option Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance			22		37	0
Total gains or losses included in earnings			366		(37)	344
Total gains or losses included in other comprehensive loss			0		0	0
Purchases			94		0	138
Issuances			0		0	0
Settlements			(482)		0	(482)
Transfers in and/or out of Level 3			0		0	0
Ending balance	$ 0		$ 0		$ 0	$ 0

[1] Consists of commitments to extend credit on loans to be held for sale.

[2] Consists of commitments to extend credit on loans to be held for sale.

[3] Consists of mandatory loan sale commitments.

[4] Consists of mandatory loan sale commitments.