Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Dec. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 264,429	$ 252,851
Accumulated Amortization	(73,303)	(55,436)
Finite-Lived Intangible Assets, Net	191,126	197,415
Indefinite-lived intangible assets	0	58,546
Gross Carrying Amount	264,429	311,397
Net Amount	191,126	255,961
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	182,631	176,088
Accumulated Amortization	(37,865)	(29,198)
Finite-Lived Intangible Assets, Net	$ 144,766	146,890
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	12 years
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 14,486	10,253
Accumulated Amortization	(10,446)	(8,593)
Finite-Lived Intangible Assets, Net	$ 4,040	1,660
Useful life	2 years
Trade name | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year
Trade name | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years
Customer backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 24,999	24,198
Accumulated Amortization	(16,442)	(12,435)
Finite-Lived Intangible Assets, Net	$ 8,557	11,763
Customer backlog | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year
Customer backlog | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Non compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 9,369	9,369
Accumulated Amortization	(6,077)	(5,105)
Finite-Lived Intangible Assets, Net	$ 3,292	4,264
Non compete | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	2 years
Non compete | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 32,944	32,944
Accumulated Amortization	(2,473)	(106)
Finite-Lived Intangible Assets, Net	$ 30,471	32,838
Developed Technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Developed Technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years
Trade name
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 0	$ 58,546