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Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 26, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Commitments [Line Items]        
Operating Lease, Right-of-Use Asset   $ 57,226    
Operating Lease, Liability   $ 63,030    
Operating Lease, Weighted Average Remaining Lease Term   7 years 8 months 12 days    
Operating Lease, Weighted Average Discount Rate, Percent   3.00%    
Operating Lease, Payments   $ 11,200    
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability   20,600    
Operating Lease, Cost [1]   10,851    
Variable Lease, Cost   1,805    
Sublease Income   (1,182)    
Net lease, Cost   11,474    
Operating Leases, Rent Expense, Sublease Rentals     $ 1,200 $ 791
Operating Leases, Rent Expense, Net     $ 9,600 $ 7,900
WASHINGTON        
Other Commitments [Line Items]        
Sale and Leaseback Transaction, Gain (Loss), Net $ (5,900)      
Bellevue Way [Domain] | WASHINGTON        
Other Commitments [Line Items]        
Sale Leaseback Transaction, Monthly Rental Payments   $ 19    
[1] Includes short-term lease costs, which are immaterial.