Leases - ROU assets and lease liabilities (Detail) $ in Thousands	Dec. 28, 2019 USD ($)
Right of use assets
Operating	$ 53,758
Finance	2,531
Current
Operating lease liabilities	5,168
Non-current
Operating lease liabilities	53,940
Operating Right Of Use Assets [Member]
Right of use assets
Operating	53,758
Property, Plant and Equipment [Member]
Right of use assets
Finance	2,531
Current Operating Lease Liabilities [Member]
Current
Operating lease liabilities	5,168
Accrued Expenses And Other Current Liabilities [Member]
Current
Finance lease liabilities	546
Non Current Operating Lease Liabilities [Member]
Non-current
Operating lease liabilities	53,940
Other Liabilities [Member]
Non-current
Finance lease liabilities	$ 2,042