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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 9 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Jun. 30, 2015
Derivative [Line Items]          
Total derivative financial instruments $ (143) $ 516 $ 757 $ (1,081)  
Commitments to extend credit on loans to be held for sale          
Derivative [Line Items]          
Total derivative financial instruments 628 1,866 (1,681) 1,537  
Mandatory loan sale commitments and TBA MBS trades          
Derivative [Line Items]          
Total derivative financial instruments (760) (1,435) 2,105 (2,531)  
Option contracts          
Derivative [Line Items]          
Total derivative financial instruments (11) $ 85 333 $ (87)  
Other Liabilities [Member]          
Derivative [Line Items]          
Derivative liabilities $ 1,100   $ 1,100   $ 3,200