Commitments and Contingencies - Narrative (Details) (USD $)	12 Months Ended
	Jan. 26, 2014	Jan. 27, 2013	Jan. 29, 2012
Commitments And Contingencies [Line Items]
Rent expense	$ 9,300,000	$ 7,900,000	$ 4,400,000
Sublease income	140,000	133,000	0
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
Cash surrender value of life insurance	14,400,000	10,000,000
Maximum potential payment under earn-out arrangement	16,000,000
Earn-out period (years)	4
Earn-out Arrangement with Cycleo, Earn-out Liability	900,000	2,700,000
Canada
Commitments And Contingencies [Line Items]
Employer contribution to defined contribution plan	1,300,000
United States
Commitments And Contingencies [Line Items]
Employer contribution to retirement plan	1,400,000	1,200,000	1,200,000
CSEM Pension Fund
Commitments And Contingencies [Line Items]
Employer contribution to retirement plan	800,000	800,000	800,000
Cycleo Earn-out Arrangement
Commitments And Contingencies [Line Items]
Requisite service period for certain Cycleo stockholders (years)	4
Reduction to deferred compensation liability	$ 1,800,000