Stock Incentive Plans - Summary of the status and shares subject to stock appreciation rights awards and average price per share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Number of Shares
Beginning balance, nonvested (in shares)	2,037,896
Granted (in shares)	1,065,739
Vested (in shares)	(1,083,278)
Canceled (in shares)	(72,788)
Ending balance, nonvested (in shares)	1,947,569	2,037,896
Weighted-Average Grant Date Fair Value
Beginning balance, nonvested (in USD per share)	$ 29.46
Granted (in USD per share)	27.39	$ 26.88	$ 30.50
Vested (in USD per share)	30.55
Canceled (in USD per share)	27.60
Ending balance, nonvested (in USD per share)	$ 27.80	$ 29.46
Stock Appreciation Rights (SARs)
Stock Options and SARs - Additional Information
Expense for nonvested stock appreciation rights awards has yet to be recognized	$ 15,194
Expense for nonvested stock appreciation rights awards has yet to be recognized, amortized over a weighted-average period (in months)	16 months
Total fair value of shares vested	$ 33,094	$ 34,706	$ 34,064