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Accrued Mining and Landfill Reclamation - Activity for Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Jan. 01, 2022
Asset Retirement Obligation, Activity      
Beginning balance $ 40,259 $ 45,051  
Acquired obligations 802 739  
Change in cost estimate 8,316 (1,238)  
Settlement of reclamation obligations (2,295) (2,756)  
Dispositions (309) (4,150)  
Accretion expense 3,132 2,613 $ 2,924
Ending balance 49,905 40,259 45,051
Summit Materials, LLC      
Asset Retirement Obligation, Activity      
Beginning balance 40,259 45,051  
Acquired obligations 802 739  
Change in cost estimate 8,316 (1,238)  
Settlement of reclamation obligations (2,295) (2,756)  
Accretion expense 3,132 2,613 2,924
Ending balance $ 49,905 $ 40,259 $ 45,051