Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization expense (less than)	$ 0.1	$ 0.1	$ 0.1	$ 0.1
Amortization expense - 2017	1.1		1.1
Amortization expense - 2018	1.7		1.7
Amortization expense - 2019	1.7		1.7
Amortization expense - 2020	1.8		1.8
Amortization expense - 2021	1.9		1.9
Amortization expense - Thereafter	$ 13.4		$ 13.4