XML 64 R68.htm IDEA: XBRL DOCUMENT v2.4.0.8
Reconciliation of Weighted Average Shares Outstanding Used for Computation of Basic and Diluted Net Income Per Common Share (Detail)
12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
Earnings Per Share [Line Items]      
Basic weighted-average common shares outstanding 147,014,869 145,253,691 154,025,589
Effect of dilutive options, stock appreciation rights, restricted stock units and performance stock units 2,211,037 1,410,040 2,165,700
Diluted weighted-average shares outstanding 149,225,906 146,663,731 156,191,289