Stock Incentive Plans - Summary of the status and shares subject to stock appreciation rights awards and average price per share (Details) - SARs - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Number of Shares
Beginning balance, nonvested (in shares)	1,878,209
Granted (in shares)	748,901
Vested (in shares)	(905,842)
Canceled (in shares)	(60,070)
Ending balance, nonvested (in shares)	1,661,198	1,878,209
Weighted-Average Grant Date Fair Value
Beginning balance, nonvested (in USD per share)	$ 28.44
Granted (in USD per share)	35.09	$ 29.71	$ 27.39
Vested (in USD per share)	28.00
Canceled (in USD per share)	31.15
Ending balance, nonvested (in USD per share)	$ 31.58	$ 28.44
Stock Options and SARs - Additional Information
Expense for nonvested stock appreciation rights awards has yet to be recognized	$ 11,817
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	$ 25,365	$ 26,461	$ 33,094
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights exercisable period after the date of grant (in years)	1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights exercisable period after the date of grant (in years)	3 years
Stock appreciation rights expiration period (in years)	10 years

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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