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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 28, 2019
Jan. 27, 2019
Jul. 01, 2017
Commitments and Contingencies [Line Items]      
Earn-out liability booked $ 4,766 $ 6,675  
Amount expected to be settled within twelve months 2,610    
Cycleo      
Commitments and Contingencies [Line Items]      
Potential payments under earn-out arrangements, high estimate 14,600    
Earn-out liability booked 4,766 4,514  
Amount expected to be settled within twelve months 2,610    
AptoVision      
Commitments and Contingencies [Line Items]      
Earn-out liability booked 0 2,161  
Amount expected to be settled within twelve months 0    
Environmental Issue      
Commitments and Contingencies [Line Items]      
Loss contingency, estimate of possible loss 1,700    
Payment towards remediation plan 3,600    
Minimum | Environmental Issue      
Commitments and Contingencies [Line Items]      
Loss contingency, estimate of possible loss 5,300    
Maximum | AptoVision      
Commitments and Contingencies [Line Items]      
Potential payments under earn-out arrangements, high estimate     $ 47,000
Maximum | Environmental Issue      
Commitments and Contingencies [Line Items]      
Loss contingency, estimate of possible loss 7,500    
Other Assets      
Commitments and Contingencies [Line Items]      
Cash surrender value of life insurance $ 22,100 $ 20,400