Intangbile assets (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Intangible Assets [Line Items]
Indefinite Lived Intangible Assets	$ 52,733	$ 53,472
Finite Lived Intangible Assets:	956,103	965,965
Accumulated Amortization:	(482,442)	(423,575)
Total Intangible assets, less accumulated amortization	526,394	595,862
Trade Names [Member]
Intangible Assets [Line Items]
Indefinite Lived Intangible Assets	52,733	53,472
Routes [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	382,263	386,724
Accumulated Amortization:	(169,050)	(145,702)
Permits [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	483,593	486,359
Accumulated Amortization:	(272,213)	(238,123)
Non-compete agreements [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	3,840	3,784
Accumulated Amortization:	(3,111)	(2,501)
Trade Names [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	65,670	72,570
Accumulated Amortization:	(32,890)	(33,242)
Royalty, consulting land use and leasehold [Member]
Intangible Assets [Line Items]
Finite Lived Intangible Assets:	20,737	16,528
Accumulated Amortization:	$ (5,178)	$ (4,007)