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Leases - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
USD ($)
Sep. 28, 2019
USD ($)
lease_extension
Dec. 30, 2018
USD ($)
Dec. 29, 2018
USD ($)
Sale Leaseback Transaction [Line Items]        
Retained earnings   $ 505,714   $ 504,909
Right-of-use Operating / Finance Leases   74,244    
Lease liability   $ 82,150    
Manufacturing Facility        
Sale Leaseback Transaction [Line Items]        
Deferred gain       $ 5,100
Term of lease 10 years      
Net proceeds from sale of facility $ 16,900      
Real Estate        
Sale Leaseback Transaction [Line Items]        
Number of options to extend | lease_extension   1    
Real Estate | Leased Assets        
Sale Leaseback Transaction [Line Items]        
Lease concentration   85.00%    
Equipment | Leased Assets        
Sale Leaseback Transaction [Line Items]        
Lease concentration   15.00%    
Minimum | Real Estate        
Sale Leaseback Transaction [Line Items]        
Lease extension term   1 year    
Maximum | Real Estate        
Sale Leaseback Transaction [Line Items]        
Lease extension term   10 years    
Impact of Implementation of Lease Guidance        
Sale Leaseback Transaction [Line Items]        
Retained earnings     $ 3,000  
Right-of-use asset and liability calculation offset     300  
Right-of-use Operating / Finance Leases     73,800  
Lease liability     82,000  
Impact of Implementation of Lease Guidance | Manufacturing Facility        
Sale Leaseback Transaction [Line Items]        
Deferred gain     $ 3,300