Commitments and Contingencies - Narrative (Details) - USD ($)		12 Months Ended
	Feb. 11, 2016	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014	Mar. 04, 2015	Mar. 07, 2012
Commitments And Contingencies [Line Items]
Rent expense		$ 7,700,000	$ 8,800,000	$ 9,300,000
Sublease income		135,000	142,000	140,000
Employer contribution to defined benefit plan		800,000	900,000	800,000
Earn-out liability		6,259,000	1,771,000
Earn-out liability expected to be paid within twelve months		0	0
Other assets
Commitments And Contingencies [Line Items]
Cash surrender value of life insurance		$ 16,800,000	18,500,000
Environmental Issue [Member]
Commitments And Contingencies [Line Items]
Lease duration		40 years
Range of possible loss, minimum		$ 5,300,000	2,700,000
Range of possible loss, maximum		7,500,000	5,700,000
Loss contingency accrual		5,300,000
Environmental Issue [Member] | Accrued liabilities
Commitments And Contingencies [Line Items]
Loss contingency accrual		1,100,000
Environmental Issue [Member] | Other long-term liabilities
Commitments And Contingencies [Line Items]
Loss contingency accrual		4,200,000
United States Postretirement Benefit Plan of US Entity [Member]
Commitments And Contingencies [Line Items]
Employer contribution to defined contribution plan		1,300,000	1,300,000	$ 1,400,000
Foreign Postretirement Benefit Plan [Member]
Commitments And Contingencies [Line Items]
Employer contribution to defined contribution plan		1,400,000
Cycleo [Member]
Commitments And Contingencies [Line Items]
Earn-out liability		6,259,000	1,771,000
Earn-out liability expected to be paid within twelve months		2,155,000	0
Potential payments under earn-out arrangements, high estimate						$ 16,000,000
Triune Systems
Commitments And Contingencies [Line Items]
Earn-out liability		0	0
Earn-out liability expected to be paid within twelve months		0	$ 0
Contingent Consideration Arrangements Based on Annual Revenue Targets [Member] | Triune Systems
Commitments And Contingencies [Line Items]
Potential payments under earn-out arrangements, high estimate					$ 70,000,000
Potential payment under earn-out arrangement for the first fiscal year		$ 13,000,000
Contingent Consideration Based on Cumulative Revenue and Operating Income Targets | Triune Systems
Commitments And Contingencies [Line Items]
Potential payments under earn-out arrangements, high estimate					$ 16,000,000
Unsecured Subordinated Convertible Promissory Note | Settlement of Dispute with Competitor
Commitments And Contingencies [Line Items]
Settlement amount	$ 5,700,000
Cash Settlement | Settlement of Dispute with Competitor
Commitments And Contingencies [Line Items]
Settlement amount	$ 300,000