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Lease Commitments - Summary of Components of Lease Expenses (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Jun. 30, 2019
Lease expense:        
Amortization of right-of-use assets $ 689 $ 706 $ 1,411 $ 1,386
Interest on lease liabilities 78 95 167 195
Finance lease expense 767 801 1,578 1,581
Operating lease expense 20,318 20,003 40,604 39,825
Variable lease expense (1) 1,465 4,539 5,981 9,222
Sublease income (293) (329) (586) (645)
Total lease expense $ 22,257 $ 25,014 $ 47,577 $ 49,983