Intangbile assets (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Intangible Assets [Line Items]
Indefinite Lived Intangible Assets	$ 55,349	$ 52,733
Finite Lived Intangible Assets:	986,417	956,103
Accumulated Amortization:	(568,086)	(482,442)
Total Intangible assets, less accumulated amortization	473,680	526,394
Trade Names [Member]
Intangible Assets [Line Items]
Indefinite Lived Intangible Assets	55,349	52,733
Routes [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	397,342	382,263
Accumulated Amortization:	(203,392)	(169,050)
Permits [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	494,191	483,593
Accumulated Amortization:	(315,246)	(272,213)
Non-compete agreements [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	3,300	3,840
Accumulated Amortization:	(2,981)	(3,111)
Trade Names [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	65,675	65,670
Accumulated Amortization:	(39,491)	(32,890)
Royalty, consulting land use and leasehold [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	25,909	20,737
Accumulated Amortization:	$ (6,976)	$ (5,178)