Shareholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Oct. 28, 2014	Dec. 31, 2015	Dec. 31, 2015	Jun. 30, 2015
Schedule Of Stockholders Equity [Line Items]
Preferred stock, shares outstanding		0	0	0
Preferred stock, shares authorized		5,000,000	5,000,000	5,000,000
Preferred stock, par value		$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized		200,000,000	200,000,000	200,000,000
Common stock, par value		$ 0.01	$ 0.01	$ 0.01
Common stock, shares issued		101,113,032	101,113,032	100,699,641
Treasury stock, shares		29,975,048	29,975,048	29,480,498
Common stock, shares outstanding		71,137,984	71,137,984	71,219,143
Repurchased shares under the Buyback Program		123,850	494,550
Cost of repurchased shares under Buyback Program		$ 12,900,000	$ 50,000,000
2014 Buyback Program [Member]
Schedule Of Stockholders Equity [Line Items]
Shares authorized to be repurchased	$ 500,000,000
Shares authorized to be repurchased, period	3 years
Repurchased shares under the Buyback Program			494,550
Cost of repurchased shares under Buyback Program			$ 50,000,000