Share-Based Compensation - Performance Restricted Stock Units (Details) - Performance Restricted Stock Units - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares outstanding beginning period (in shares)	762,000	463,000	115,000
Shares granted (in shares)	0	420,000	848,000
Shares vested (in shares)	0	(10,000)	(15,000)
Shares forfeited (in shares)	(132,000)	(111,000)	(485,000)
Shares outstanding ending period (in shares)	630,000	762,000	463,000
Vested shares (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, beginning period (dollars per share)	$ 8.51	$ 13.07	$ 10.76
Weighted average grant date fair value, granted (dollars per share)	0.00	4.69	12.30
Weighted average grant date fair value, vested and issued (dollars per share)	0.00	10.76	10.76
Weighted average grant date fair value, forfeited (dollars per share)	7.02	12.86	11.25
Weighted average grant date fair value, ending period (dollars per share)	8.82	$ 8.51	$ 13.07
Weighted average granted date fair value, vested shares (dollars per share)	$ 0.00
Fair value of vested awards		$ 0.1	$ 0.1