XML 112 R86.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 26, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Other Commitments [Line Items]        
Operating Lease, Weighted Average Remaining Lease Term   8 years 2 months 12 days    
Operating Lease, Weighted Average Discount Rate, Percent   2.60%    
Operating Lease, Payments   $ 11,200 $ 11,200  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability   13,900 $ 20,600  
Operating Leases, Rent Expense, Sublease Rentals       $ 1,200
Operating Leases, Rent Expense, Net       $ 9,600
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