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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, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2015
Derivative [Line Items]          
Total derivative financial instruments $ 336 $ (81) $ 900 $ (1,597)  
Commitments to extend credit on loans to be held for sale          
Derivative [Line Items]          
Total derivative financial instruments (1,098) (1,334) (2,309) (329)  
Mandatory loan sale commitments and TBA MBS trades          
Derivative [Line Items]          
Total derivative financial instruments 1,068 1,337 2,865 (1,096)  
Option contracts          
Derivative [Line Items]          
Total derivative financial instruments 366 $ (84) 344 $ (172)  
Other Liabilities [Member]          
Derivative [Line Items]          
Derivative liabilities $ 549   $ 549   $ 3,200