Share-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended													3 Months Ended										1 Months Ended
	Sep. 30, 2013 Y D	Sep. 30, 2012 Y	Sep. 30, 2013 Restricted Stock Units with Earning Per Share Performance Conditions [Member]	Sep. 30, 2012 Restricted Stock Units with Earning Per Share Performance Conditions [Member]	Sep. 30, 2013 Restricted Stock Units with Market Conditions [Member]	Sep. 30, 2012 Restricted Stock Units with Market Conditions [Member]	Sep. 30, 2013 Monte Carlo Simulation [Member]	Sep. 30, 2012 Monte Carlo Simulation [Member]	Sep. 30, 2013 Restricted Stock Units [Member]	Sep. 30, 2012 Restricted Stock Units with Return on Invested Capital Performance Conditions [Member]	Sep. 30, 2013 2012 Plan [Member]	Sep. 30, 2012 2012 Plan [Member]	Dec. 07, 2011 2012 Plan [Member]	Sep. 30, 2013 2012 Plan [Member] Full Value Grant [Member]	Sep. 30, 2013 2012 Plan [Member] Option or Stock Appreciation Right Grant [Member]	Sep. 30, 2013 2012 Plan [Member] Common Stock [Member]	Sep. 30, 2013 2012 Plan [Member] Stock-Settled Restricted Stock Units [Member]	Sep. 30, 2013 2012 Plan [Member] Cash-Settled Restricted Stock Units [Member]	Sep. 30, 2013 2012 Plan [Member] Cash-Settled Stock Appreciation Rights [Member]	Sep. 30, 2013 2012 Plan [Member] Time Vested Restricted Stock Units [Member] Y	Sep. 30, 2012 2012 Plan [Member] Time Vested Restricted Stock Units [Member] Y	Sep. 30, 2013 2012 Plan [Member] Restricted Stock Units [Member]	Sep. 30, 2012 2012 Plan [Member] Restricted Stock Units [Member]	Sep. 30, 2008 Outside 2002 Plan [Member] Restricted Stock Units [Member]	Jan. 31, 2008 Outside 2002 Plan [Member] Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant											1,630,179		4,400,000
Number of stock options, granted	438,030															438,030	434,073	613	5,515
Stock option and incentive plan, maturity date											Dec. 07, 2021
Number of awards for reduction of shares available for grant under 2012 Plan											1
Reduction in shares available for grant for one award under the plan														1.71	1
Share-based compensation	$ 6,623,000	$ 4,867,000
Total income tax benefit recognized	1,500,000	1,300,000
Weighted-average grant-date fair value of options granted	$ 20.74	$ 16.89
Total intrinsic value of options exercised	11,000,000	5,500,000
Extended vesting period after employee termination, days	90
Restricted stock units granted			130,616	97,733	130,641	97,733				97,733										172,816	232,749	613	869	28,344	34,608
Cliff vesting period, in years	3	3
Restricted stock units, grant date fair value							6,000,000	3,700,000
Compensation expenses recognized period (years)											3 years	3 years
Restricted stock units vesting period																				3	3
Cash-settled restricted stock units, outstanding											2,632
Number of cash settled restricted stock units		1,608
Restricted stock units settled cost		100,000
Total unrecognized compensation cost									41,600,000
Aggregate intrinsic value of equity classified restricted stock									$ 104,800,000
Weighted average recognition period, years									1 year 10 months 24 days