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Lease Commitments - Summary of Components of Lease Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Lease expense:
Amortization of right-of-use assets	$ 649	$ 722
Interest on lease liabilities	59	89
Finance lease expense	708	811
Operating lease expense	20,336	20,287
Variable lease expense	4,492	4,124
Sublease income	(78)	(293)
Total lease expense	$ 25,458	$ 24,929

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Finance lease expense.

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- Definition

Amount of interest expense on finance lease liability.

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of sublease income excluding finance and operating lease expense.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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