Share-Based Incentive Plans - Summary of Option Transactions (Details) - Stock Option Awards - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Number of Shares
Options outstanding at the beginning of year	3,212,000	1,838,000	1,731,000
Granted during year	1,564,000	2,500,000	375,000
Exercised during the year	(6,208)	(4,667)	(161,226)
Forfeited or expired during year	(1,254,000)	(1,121,000)	(107,000)
Options outstanding at the end of year	3,516,000	3,212,000	1,838,000	1,731,000
Exercisable at June 30, 2017	706,000
Weighted-Average Exercise Price
Options outstanding at the beginning of year	$ 8.57	$ 13.37	$ 12.00
Granted during year	6.11	6.48	18.85
Exercised during the year	1.24	1.24	6.85
Forfeited or expired during year	9.88	11.81	20.47
Options outstanding at the end of year	7.02	$ 8.57	$ 13.37	$ 12.00
Exercisable at June 30, 2017	$ 9.90
Weighted-Average Remaining Contractual Term (Years)
Options outstanding at the end of year	7 years 10 months 10 days	7 years 7 months 10 days	8 years 2 months 30 days	8 years 9 months
Exercisable at June 30, 2017	4 years 2 months 12 days
Aggregate Intrinsic Value
Options outstanding at the end of year	$ 2	$ 2,111	$ 1,384	$ 10,689
Exercisable at June 30, 2017	$ 2