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Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 30, 2021
Mar. 31, 2020
Leases    
Operating $ 32,394 $ 33,041
Variable 16,481 15,828
Short-term 70 129
Total 48,945 48,998
Lessee Operating Lease Description    
Operating cash flows from operating leases 33,926 30,760
Right-of-use assets obtained in exchange for new operating lease liabilities $ 7,372 $ 14,929