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Stock Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 9,855,000	$ 10,429,000	$ 12,016,000
Recognition of related excess tax benefits	0	500,000	100,000
Cash flows from financing activities a gross benefit of tax deductions	$ 0	$ 543,000	$ 156,000
General contractual term for stock options granted to employees	7 years
Number of common stock shares increased in reserve for annual basis	200,000
Total unrecognized compensation expense related to unvested stock	$ 2,600,000
Total unrecognized compensation expense related to restricted stock	$ 14,800,000
2010 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance	11,411,822
Percentage of common stock reserved for issuance to be increased	5.00%
Maximum number of shares that may be issued	30,000,000
Shares available for issuance	9,348,679
Directors' Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance	2,047,770
Shares available for issuance	803,142
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting percentage one year from the date of grant	25.00%
Remaining stock option vesting percentage over the three years period thereafter	75.00%
Restricted stock units vesting period	4 years
Weighted average period (in years)	2 years 26 days
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vesting period	4 years			5 years
Restricted stock units vesting percentage one year from the date of grant	25.00%			15.00%
Restricted stock units vesting percentage over the following three years				60.00%
Remaining restricted stock units vesting percentage				25.00%
Remaining restricted stock units vesting quarterly thereafter percentage	6.25%
Weighted average period (in years)	2 years 10 months 2 days

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