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Benefit Plans Benefit Plans (Post-retirement) (Details)
 12 Months Ended
Jun. 30, 2017
USD ($)
officer
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Cash surrender value of bank owned life insurance $ 7,300,000 $ 7,100,000  
Bank owned life insurance, non-taxable income 262,000 258,000 $ 252,000
Bank Owned Life Insurance, Mortality Cost $ 94,000 73,000 62,000
Executive Officer [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Number of executive officers | officer 1    
Post-retirement compensation liability $ 5,200,000 4,900,000  
Post-retirement compensation expense 290,000 170,000  
Deferred Compensation Arrangement with Individual, Recovery $ 73,000 119,000  
401(k) defined contribution plan [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer matching contributions (percent) 3.00%    
Employee contributions, immediate vesting (percent) 100.00%    
Vesting term for employer matching contributions 6 years    
401(k) defined contribution expense $ 843,000 $ 860,000 $ 880,000