Share-Based Compensation - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at June 30, 2013, Shares	2,124,032
Granted, Shares	438,030
Exercised, Shares	(426,596)
Forfeited or expired, Shares	(31,647)
Outstanding at September 30, 2013, Shares	2,103,819
Exercisable at September 30, 2013, Shares	1,090,535
Outstanding at June 30, 2013, Weighted Average Exercise Price Per Share	$ 57.67
Granted, Weighted Average Exercise Price Per Share	$ 66.08
Exercised, Weighted Average Exercise Price Per Share	$ 40.59
Forfeited or expired, Weighted Average Exercise Price Per Share	$ 57.11
Outstanding at September 30, 2013, Weighted Average Exercise Price Per Share	$ 62.89
Exercisable at September 30, 2013, Weighted Average Exercise Price Per Share	$ 72.13
Outstanding at June 30, 2013, Weighted Average Remaining Contractual Term (Years)	6 years 3 months 15 days
Outstanding at September 30, 2013, Weighted Average Remaining Contractual Term (Years)	6 years 10 months 2 days
Exercisable at September 30, 2013, Weighted Average Remaining Contractual Term (Years)	4 years 8 months 5 days
Outstanding at June 30, 2013, Average Intrinsic Value	$ 21,077
Outstanding at September 30, 2013, Average Intrinsic Value	27,530
Exercisable at September 30, 2013, Average Intrinsic Value	$ 14,055