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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
Oct. 29, 2017
Jul. 01, 2017
Jan. 29, 2017
Mar. 04, 2015
Commitments and Contingencies [Line Items]        
Earn-out liability booked $ 23,247   $ 6,068  
Amount expected to be settled within twelve months 11,486      
Cycleo [Member]        
Commitments and Contingencies [Line Items]        
Potential payments under earn-out arrangements, high estimate 16,000      
Earn-out liability booked 6,059   6,068  
Amount expected to be settled within twelve months 2,798      
Triune Systems [Member]        
Commitments and Contingencies [Line Items]        
Earn-out liability booked 0   0  
Amount expected to be settled within twelve months 0      
AptoVision Technologies Inc. [Member]        
Commitments and Contingencies [Line Items]        
Earn-out liability booked 17,188   $ 0  
Amount expected to be settled within twelve months 8,688      
Earn-out Payable Within First Three Fiscal Years Of Acquisition Date [Member] | Triune Systems [Member]        
Commitments and Contingencies [Line Items]        
Potential payments under earn-out arrangements, high estimate       $ 70,000
Additional Earn-out Payable After Third Fiscal Year From Acquisition Date [Member] | Triune Systems [Member]        
Commitments and Contingencies [Line Items]        
Potential payments under earn-out arrangements, high estimate       $ 16,000
Minimum [Member] | Environmental Issue        
Commitments and Contingencies [Line Items]        
Loss contingency, estimate of possible loss 4,700      
Maximum [Member] | AptoVision Technologies Inc. [Member]        
Commitments and Contingencies [Line Items]        
Potential payments under earn-out arrangements, high estimate   $ 47,000    
Maximum [Member] | Environmental Issue        
Commitments and Contingencies [Line Items]        
Loss contingency, estimate of possible loss $ 7,200      
Maximum [Member] | Earn-out Payable Within First Three Fiscal Years Of Acquisition Date [Member] | AptoVision Technologies Inc. [Member]        
Commitments and Contingencies [Line Items]        
Potential payments under earn-out arrangements, high estimate   $ 47,000