Shareholders' Equity and Share-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding at June 30, 2014, Shares	1,419,598
Granted, Shares	6,459
Exercised, Shares	(494,304)
Forfeited or expired, Shares	(94,355)
Outstanding at June 30, 2015, Shares	837,398	1,419,598
Exercisable at June 30, 2015, Shares	466,459
Outstanding at June 30, 2014, Weighted Average Exercise Price Per Share	$ 65.90
Granted, Weighted Average Exercise Price Per Share	120.31
Exercised, Weighted Average Exercise Price Per Share	57.21
Forfeited or expired, Weighted Average Exercise Price Per Share	75.30
Outstanding at June 30, 2015, Weighted Average Exercise Price Per Share	70.40	$ 65.90
Exercisable at June 30, 2015, Weighted Average Exercise Price Per Share	$ 78.13
Outstanding, Weighted Average Remaining Contractual Term (Years)	5 years 7 months 13 days	6 years 8 months 12 days
Exercisable at June 30, 2015, Weighted Average Remaining Contractual Term (Years)	3 years 10 months 6 days
Outstanding at June 30, 2014, Aggregate Intrinsic Value	$ 62,204
Outstanding at June 30, 2015, Aggregate Intrinsic Value	40,864	$ 62,204
Exercisable at June 30, 2015, Aggregate Intrinsic Value	$ 19,200