Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Outstanding Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2012
Amount
Derivative [Line Items]
Derivative financial instruments	$ (180,605)	$ (195,109)
Fair Value
Derivative [Line Items]
Derivative financial instruments	(996)	6,362
Commitments to extend credit on loans to be held for sale
Derivative [Line Items]
Commitments estimated may not fund (percent)	26.60%	23.60%
Commitments to extend credit on loans to be held for sale | Amount
Derivative [Line Items]
Derivative financial instruments	135,341	255,635
Commitments to extend credit on loans to be held for sale | Fair Value
Derivative [Line Items]
Derivative financial instruments	3,365	(1,032)
Best efforts loan sale commitments | Amount
Derivative [Line Items]
Derivative financial instruments	(12,565)	(29,847)
Best efforts loan sale commitments | Fair Value
Derivative [Line Items]
Derivative financial instruments	0	0
Mandatory loan sale commitments and TBA MBS trades | Amount
Derivative [Line Items]
Derivative financial instruments	(293,381)	(410,897)
Mandatory loan sale commitments and TBA MBS trades | Fair Value
Derivative [Line Items]
Derivative financial instruments	(4,443)	6,805
Put option contracts | Amount
Derivative [Line Items]
Derivative financial instruments	(10,000)	(10,000)
Put option contracts | Fair Value
Derivative [Line Items]
Derivative financial instruments	$ 82	$ 589