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Acquisitions Pro Forma Narrative (Details) - Houston Interests, LLC [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Business Acquisition [Line Items] |  |  |  |
Pro forma acquisition costs | $ 0.4 |  | $ 3.4 |
Pro forma acquisition costs, amortized over time | 0.4 | $ 0.3 | 1.1 | $ 0.8
Pro forma interest expense |  | 0.4 | 0.7 | 1.0
Pro forma depreciation and amortization expense | $ 0.6 | 0.5 | 0.8 | 1.4
Pro forma income tax expense |  | $ 0.6 | $ 4.3 | $ 1.8

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