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Acquisitions Pro Forma Narrative (Details) - Houston Interests, LLC [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |
Pro forma acquisition costs |  |  |  | $ 3.0
Pro forma acquisition costs, amortized over time | $ 0.4 | $ 0.3 | $ 0.8 | 0.5
Pro forma interest expense | 0.3 |  | 0.7 |
Pro forma depreciation and amortization expense | 0.2 | 0.5 | 0.3 | 0.9
Pro forma income tax expense | $ 1.9 | $ 2.5 | $ 3.3 | $ 2.1

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