Summary of the Status and Changes of Shares Subject to RSU Awards and the Related Average Price Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Weighted-Average Grant Date Fair Value
Income tax benefit	$ 37,993	$ 47,659	$ 14,008
Restricted Stock Units (RSUs)
Number of Shares
Nonvested June 30, 2013 (in shares)	466,241
Granted (in shares)	282,565
Vested (in shares)	(259,307)
Canceled (in shares)	(17,969)
Nonvested June 30, 2014 (in shares)	471,530	466,241
Weighted-Average Grant Date Fair Value
Nonvested June 30, 2013	$ 73.55
Granted	$ 106.15
Vested	$ 69.44
Canceled	$ 93.42
Nonvested June 30, 2014	$ 94.59	$ 73.55
Stock-based compensation expense	21,475	17,852	12,393
Total fair value of shares vested	18,007	12,488	8,642
Income tax benefit	$ 2,509	$ 976	$ 1,673

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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