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Incentive Plans: Equity Incentive Plan Policy: Schedule of Incentive Plan Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2018
Mar. 31, 2017
Shares:      
Oustanding, End of Period 529,000 529,000 683,250
Equity Incentive Plan [Member]      
Shares:      
Outstanding, Beginning of Period 585,500 615,250  
Granted 0 0  
Exercised (56,500) (83,750)  
Forfeited 0 (2,500)  
Oustanding, End of Period 529,000 529,000  
Vested and expected to vest at year end 490,850 490,850  
Exercisable at year end 338,250 338,250  
Weighted-Average Exercise Price (in dollars per share):      
Oustanding, Beginning of Period $ 12.25 $ 12.14  
Granted 0.00 0.00  
Exercised 7.36 8.08  
Forfeited 0.00 14.59  
Outstanding, End of Period 12.77 12.77  
Vested and expected to vest at year end 12.57 12.57  
Exercisable at year end $ 11.36 $ 11.36  
Weighted- Average Remaining Contractual Term (Years):      
Outstanding at year end 5 years 6 months 7 days 5 years 6 months 7 days  
Vested and expected to vest at year end 5 years 5 months 5 years 5 months  
Exercisable at year end 4 years 9 months 20 days 4 years 9 months 20 days  
Aggregate Intrinsic Value ($000):      
Outstanding at year end $ 2,853 $ 2,853  
Vested and expected to vest at year end 2,738 2,738  
Exercisable at year end $ 2,277 $ 2,277