Shareholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended
	Oct. 28, 2014	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Schedule Of Stockholders Equity [Line Items]
Preferred stock, shares outstanding		0		0
Preferred stock, shares authorized		5,000,000		5,000,000
Preferred stock, par value		$ 0.01		$ 0.01
Common stock, shares authorized		200,000,000		200,000,000
Common stock, par value		$ 0.01		$ 0.01
Common stock, shares issued		101,492,917		101,157,320
Treasury stock, shares		31,563,678		31,112,246
Common stock, shares outstanding		69,929,239		70,045,074
Repurchased shares, cost		$ 35,164,000	$ 37,097,000
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		451,432	370,700
Repurchased shares, cost		$ 35,164,000	$ 37,097,000
Cumulative buyback shares		2,083,180
Cumulative buyback cost		$ 175,200,000