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Leases - Schedule of Components of Lease Expense (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Operating lease cost:        
Fixed lease cost $ 12,499 $ 12,363 $ 25,140 $ 25,735
Variable lease cost (15) 0 (4) 0
Total operating lease cost 12,484 12,363 25,136 25,735
Finance lease cost:        
Amortization of leased assets 41 138 106 218
Interest on lease liabilities 3 5 6 13
Total finance lease cost 44 143 112 231
Total lease cost $ 12,528 $ 12,506 $ 25,248 $ 25,966