Stock Options, Stock Appreciation Rights and Restricted Shares - Additional Information (Detail) (USD $)	3 Months Ended												9 Months Ended
	May 04, 2013 Performance Based Restricted Stock Awards Second Amended And Restated Long Term Incentive Compensation Plan, 2005	Nov. 02, 2013 Restricted Stock Key employees	Aug. 03, 2013 Restricted Stock Key employees	May 04, 2013 Restricted Stock Key employees	Nov. 02, 2013 Restricted Stock Key employees Minimum	Aug. 03, 2013 Restricted Stock Key employees Minimum	May 04, 2013 Restricted Stock Key employees Minimum	Nov. 02, 2013 Restricted Stock Key employees Maximum	Aug. 03, 2013 Restricted Stock Key employees Maximum	May 04, 2013 Restricted Stock Key employees Maximum	Aug. 03, 2013 Restricted Stock Director	May 04, 2013 Restricted Stock Second Amended And Restated Long Term Incentive Compensation Plan, 2005	Nov. 02, 2013 Stock Appreciation Rights Sars Settleable In Shares	Nov. 02, 2013 Stock Appreciation Rights Sars Settleable In Shares Minimum	Nov. 02, 2013 Stock Appreciation Rights Sars Settleable In Shares Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expected vesting percentage	100.00%
Award vesting date	2016-05
Number of shares awarded		120,400	133,460	225,938							13,740	109,644	14,000
Fair value of stock granted		$ 2,200,000	$ 2,700,000	$ 4,000,000							$ 300,000	$ 1,900,000	$ 141,000
Vesting Period					3 years	3 years	3 years	5 years	5 years	5 years	3 years		4 years
Number of directors awarded restricted stock											5
Exercise price														$ 16.79	$ 18.57
Award Expiration term													10 years