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Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation There have been no changes to our stock-based compensation plans from those disclosed in our 2017 Annual Report on Form 10-K. Our stock-settled stock appreciation rights (“SSSARs”) compensation expense was $0.6 million and $0.4 million for the three months ended March 31, 2018 and 2017, respectively. Year-to-date SSSARs compensation expense was $1.7 million for the current-year period compared to $1.3 million for the prior-year period. At March 31, 2018, there was $5.4 million of unrecognized compensation expense related to SSSARs that we will recognize over a weighted-average period of 2 years. Our restricted stock compensation expense was $0.6 million for the three months ended March 31, 2018 and 2017 and $1.8 million for the nine months ended March 31, 2018 and 2017. At March 31, 2018, there was $5.0 million of unrecognized compensation expense related to restricted stock that we will recognize over a weighted-average period of 2 years.