Long-term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended					3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014 Minimum	Apr. 30, 2014 Minimum LIBOR Rate Loans Ranging	Apr. 30, 2014 Minimum Base Rate Loans Ranging	Apr. 30, 2014 Maximum	Apr. 30, 2014 Maximum LIBOR Rate Loans Ranging	Apr. 30, 2014 Maximum Base Rate Loans Ranging	Apr. 30, 2014 Credit Card Receivables Plus	Apr. 30, 2014 Inventory	Dec. 27, 2013 Inventory
Line Of Credit Facility [Line Items]
Revolving credit facility	$ 115
Maturity date	Jan. 04, 2017
Repurchase of common stock	10
Absolute minimum available reserve	10
Date of merger agreement	Mar. 17, 2014
The amount outstanding under the Amended Credit Agreement is limited by a borrowing base									85.00%	90.00%	92.50%
Maximum limit to the line of credit facility	115
Minimum available reserve percentage	10.00%
Applicable Margin for loans ranging rate				2.00%	1.00%		2.50%	1.50%
Unused line fees ranging			0.30%			0.375%
Aggregate amount of the letters of credit	0.8
Excess availability of line of credit	$ 46.3
Average rate of interest	2.50%	2.50%