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Leases - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2021	Jun. 25, 2020	Jul. 01, 2021	Jun. 25, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ 699	$ 170	$ 1,329	$ 805
Operating cash flows from finance leases	240	262	490	531
Operating cash flows from operating leases	7,899	1,769	15,292	6,413
Right of use assets obtained in exchange for new lease obligations:
Finance lease liabilities		139		164
Operating lease liabilities	$ 0	$ 0	$ 1,575	$ 9,630

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