Dividend Program (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Sep. 02, 2015	Jun. 18, 2015	Aug. 02, 2015	Aug. 03, 2014
Dividends [Line Items]
Cash dividends paid			$ 5,676	$ 5,502
Date of payment to shareholders entitled to dividends		Jul. 15, 2015
Date of record of shareholders entitled to dividends		Jul. 01, 2015
Special Dividend [Member]
Dividends [Line Items]
Cash dividend declared, per share		$ 0.40
Cash dividend payment, per share			$ 0.40	$ 0.40
Cash dividends paid			$ 5,000	$ 4,900
Quarterly Dividend [Member]
Dividends [Line Items]
Cash dividend declared, per share		$ 0.06
Cash dividend payment, per share			$ 0.06	$ 0.05
Cash dividends paid			$ 740	$ 611
Quarterly Dividend [Member] | Subsequent Event [Member]
Dividends [Line Items]
Cash dividend declared, per share	$ 0.06
Date of payment to shareholders entitled to dividends	Oct. 15, 2015
Date of record of shareholders entitled to dividends	Oct. 01, 2015