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Incentive Plans Incentive Plans: Equity Incentive Plan Policy: Valuation Assumptions (Details) - Equity Incentive Plans - Employee Stock Option [Member]
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility   0.00% 53.70%
Weighted-average volatility 41.70% 0.00% 53.70%
Expected dividend yield 2.70% 0.00% 3.00%
Expected term 7 years 4 months 24 days 0 years 7 years 2 months 12 days
Risk-free interest rate 1.50% 0.00% 2.20%
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 41.40%    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 41.70%