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Intangbile assets (Details) - USD ($) $ in Thousands | Dec. 28, 2019 | Dec. 29, 2018
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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)

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