Goodwill and Other Intangible Assets - Summary of Goodwill Amounts by Operating Segment (Detail) $ in Thousands	9 Months Ended
Sep. 28, 2019 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 803,847
Acquisitions(1)	9,382
Dispositions	0
Goodwill, Purchase Accounting Adjustments	4,488
Other	817
Ending balance	818,534
United States
Goodwill [Roll Forward]
Beginning balance	772,213
Acquisitions(1)	9,382
Dispositions	0
Goodwill, Purchase Accounting Adjustments	4,488
Other	0
Ending balance	786,083
Canada
Goodwill [Roll Forward]
Beginning balance	27,938
Acquisitions(1)	0
Dispositions	0
Goodwill, Purchase Accounting Adjustments	0
Other	820
Ending balance	28,758
Other
Goodwill [Roll Forward]
Beginning balance	3,696
Acquisitions(1)	0
Dispositions	0
Goodwill, Purchase Accounting Adjustments	0
Other	(3)
Ending balance	$ 3,693

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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