Goodwill and Other Intangible Assets - Schedule of Goodwill and Intangible Assets Net (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2020	Dec. 28, 2019
Indefinite-lived Intangible Assets [Line Items]
Less: Accumulated amortization	$ (112,908)	$ (98,784)
Subtotal	120,367	107,121
Other intangible assets, net	261,208	255,962
Goodwill at December 28, 2019	277,600
Goodwill at October 3, 2020	328,425
Impairment of WWS trade name	(8,000)
NewSouth [Member]
Indefinite-lived Intangible Assets [Line Items]
Increase related to the acquisition of NewSouth	50,825
Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	140,841	148,841
Impairment of WWS trade name	(8,000)
Customer Relationships and Customer-related Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 201,547	200,647
Customer Relationships and Customer-related Assets [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	1 year
Customer Relationships and Customer-related Assets [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	10 years
Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 22,200
Initial Useful Life (in years)	15 years
Developed Technology [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 5,600	3,000
Developed Technology [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	6 years
Developed Technology [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	10 years
Noncompete Agreements [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 3,338	1,668
Noncompete Agreements [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	2 years
Noncompete Agreements [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	5 years
Software License [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 590	$ 590
Initial Useful Life (in years)	2 years