XML 85 R51.htm IDEA: XBRL DOCUMENT v2.4.0.8
Reasons for Differences between Company's Effective Tax Rate and Statutory U.S. Federal Income Tax Rate (Detail)
12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
Reconciliation of Effective Income Tax Rate [Line Items]      
Expected provision at statutory U.S. federal tax rate 35.00% 35.00% 35.00%
State and local income taxes, net of federal tax benefit 2.20% 3.10% 3.20%
Foreign taxes (2.70%) (1.70%) (2.10%)
Other (0.50%) 0.40% (0.20%)
Effective tax rate 34.00% 36.80% 35.90%