Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization expense (less than)	$ 0.4	$ 0.1	$ 0.5	$ 0.1
Amortization expense - 2017	1.0		1.0
Amortization expense - 2018	2.1		2.1
Amortization expense - 2019	2.1		2.1
Amortization expense - 2020	2.1		2.1
Amortization expense - 2021	2.2		2.2
Amortization expense - Thereafter	$ 12.2		$ 12.2