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Stock-Based Compensation Stock Options (Details)
 9 Months Ended
Mar. 31, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Total outstanding options at beginning of year (in shares) | shares 104,000
Options granted (in shares) | shares 40,000
Options exercised (in shares) | shares 0
Options canceled (in shares) | shares 0
Outstanding options at end of period (in shares) | shares 144,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Total outstanding options at beginning of year (in dollars per share) | $ / shares $ 27.24
Options granted (in dollars per share) | $ / shares 30.87
Options exercised (in dollars per share) | $ / shares 0.00
Outstanding options at end of period (in dollars per share) | $ / shares 0.00
Total outstanding options at beginning of year (in dollars per share) | $ / shares $ 25.85
Exercisable at end of period (in shares) | shares 0
Vested and expected to vest at end of year (in shares) | shares 144,000
Exercisable at end of period (in dollars per share) | $ / shares $ 0.00
Vested and expected to vest at end of year (in dollars per share) | $ / shares $ 27.24