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Schedule of Share-Based Compensation Expense (Income) Included in Selling, General and Administrative Expenses in Condensed Consolidated Statements of Income (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 15,623 $ 16,736 $ 15,742
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense 841 1,377 2,621
Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense 1,295 2,244 2,918
Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense [1],[2] 13,464 12,991 9,956
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 23 $ 124 $ 247
[1] Includes the reversal of $1,396 of previously recognized compensation expense in fiscal 2015, related to 163,336 PSU's that will not vest as the achievement of the related performance target is not probable.
[2] Includes the reversal of $967 of previously recognized compensation expense in fiscal 2016, related to 50,004 PSU's that will not vest as the achievement of the related performance target is not probable.