Share Based Payments - Summary of Stock Option and Restricted Stock Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Nov. 15, 2018
Share-based Payment Arrangement [Abstract]
Awards outstanding beginning balance (in shares)	4,503,000
Plan amendment (in shares)	0
Awards granted (in shares)	(1,347,000)		(1,000,000)
Awards forfeited (in shares)	158,000
Awards outstanding ending balance (in shares)	4,314,000	4,503,000
Nonvested Restricted Stock Activity
Awards outstanding beginning balance (in shares)	2,366,000
Awards granted (in shares)	1,054,000
Shares vested (in shares)	(1,085,000)
Awards forfeited (in shares)	(123,000)
Awards outstanding ending balance (in shares)	2,212,000	2,366,000
Weighted Average Grant Date Fair Value
Awards outstanding beginning balance (in dollars per share)	$ 41.72
Awards granted (in dollars per share)	44.88
Shares vested (in dollars per share)	39.10
Awards forfeited (in dollars per share)	45.86
Awards outstanding ending balance (in dollars per share)	$ 44.25	$ 41.72
Awards outstanding beginning balance (in shares)	14,000
Stock options exercised (in shares)	(13,000)
Awards expired (in shares)	0
Awards outstanding ending balance (in shares)	1,000	14,000
Stock options exercisable at end of period (in shares)	1,000
Weighted Average Exercise Price
Awards outstanding beginning balance (in dollars per share)	$ 12.20
Stock options exercised (in dollars per share)	12.70
Awards expired (in dollars per share)	0
Awards outstanding ending balance (in dollars per share)	6.89	$ 12.20
Stock options exercisable at end of period (in dollars per share)	$ 6.89
Weighted Average Remaining Contractual Term
Awards outstanding	3 years	8 months 12 days
Stock options exercisable	3 years
Aggregate Intrinsic Value
Awards outstanding beginning balance	$ 481
Awards outstanding ending balance	49	$ 481
Stock options exercisable at end of period	$ 49