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Intangbile assets (Details) - USD ($) $ in Thousands | Jan. 02, 2021 | Dec. 28, 2019
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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)

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