Other Non-Current Liabilities - (Detail) - USD ($)	Sep. 26, 2020	Dec. 28, 2019
Other Liabilities, Long Term [Abstract]
Lessee lease liabilities, non-current	$ 23,600,000	$ 15,834,000
Income tax payable, non-current	19,245,000	21,509,000
Unrecognized tax benefits	15,602,000	13,184,000
Deferred tax liabilities	3,190,000	3,052,000
Other	3,950,000	2,456,000
Total other non-current liabilities	$ 65,587,000	$ 56,035,000