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Leases - Future Minimum Lease Payments under Non-Cancelable Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2014
Operating Leased Assets [Line Items]  
2014 $ 25,724
2015 22,868
2016 20,726
2017 18,623
2018 15,296
Thereafter 25,396
Total minimum lease payments 128,633
Less sublease income   
Net minimum lease payments under operating leases $ 128,633