Leases - Rental Expense for Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Operating Leased Assets [Line Items]
Minimum rentals	$ 25,409	$ 26,125	$ 27,253
Contingent rentals	17	31	37
Less sublease income	(111)	(145)	(71)
Rental expense	$ 25,315	$ 26,011	$ 27,219