Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Schedule of Outstanding Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Jun. 30, 2012
Amount
Derivative [Line Items]
Derivative financial instruments	$ (195,109)		$ (233,777)
Fair Value
Derivative [Line Items]
Derivative financial instruments	6,362		2,701
Commitments to extend credit on loans to be held for sale
Derivative [Line Items]
Commitments estimated may not fund (percent)	23.60%		33.80%
Commitments to extend credit on loans to be held for sale | Amount
Derivative [Line Items]
Derivative financial instruments	255,635	[1]	220,357	[1]
Commitments to extend credit on loans to be held for sale | Fair Value
Derivative [Line Items]
Derivative financial instruments	(1,032)	[1]	3,981	[1]
Best efforts loan sale commitments | Amount
Derivative [Line Items]
Derivative financial instruments	(29,847)		(30,498)
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	(410,897)		(408,636)
Mandatory loan sale commitments and TBA MBS trades | Fair Value
Derivative [Line Items]
Derivative financial instruments	6,805		(1,316)
Put option contracts | Amount
Derivative [Line Items]
Derivative financial instruments	(10,000)		(15,000)
Put option contracts | Fair Value
Derivative [Line Items]
Derivative financial instruments	$ 589		$ 36

[1] Net of 23.6% percent at June 30, 2013 and 33.8% percent at June 30, 2012 of commitments, which management has estimated may not fund.