Commitments and Contingencies - Narrative (Details) (USD $)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 25, 2015	Jan. 26, 2014
Commitments And Contingencies [Line Items]
Rent expense	$ 7,900,000	$ 4,400,000	$ 4,400,000
Sublease income	133,000	0	158,000
Vendor commitments				300,000	1,200,000
Lease duration	40 years
Range of possible loss, minimum	2,500,000
Range of possible loss, maximum	5,700,000
Environmental reserve accrual	2,500,000
Maximum potential payment under earn-out arrangement	16,000,000
Earn-out period (years)	4
Cash surrender value of life insurance	10,000,000	10,200,000
Canada
Commitments And Contingencies [Line Items]
Employer contribution to defined contribution plan	1,500,000
United States
Commitments And Contingencies [Line Items]
Employer contribution to retirement plan	1,200,000	1,200,000	1,000,000
CSEM Pension Fund
Commitments And Contingencies [Line Items]
Employer contribution to retirement plan	800,000	800,000	800,000
Cycleo Earn-out Arrangement [Member]
Commitments And Contingencies [Line Items]
Requisite service period for certain Cycleo stockholders (years)	4
Compensation expense related to deferred compensation liability	$ 1,800,000