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Investment Securities: Mortgage Backed Securities Policy (Details)
security in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jun. 30, 2015
security
Schedule of Available-for-sale Securities [Line Items]          
Principal payments from investment securities available for sale $ 3,200 $ 697 $ 7,296 $ 1,347  
Other-than-temporary impairments, investments $ 0 $ 0 $ 0 $ 0  
Available for sale | Private issue CMO          
Schedule of Available-for-sale Securities [Line Items]          
Number of investment securities held | security         0