DEBT - Summary of Activity for Deferred Financing Fees (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Accumulated Amortization [Roll Forward]
Beginning balance	$ 13,049	$ 18,367
Amortization	(2,028)	(2,510)
Write off of deferred financing fees		(2,116)
Ending balance	11,021	13,741
Summit Materials, LLC
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Accumulated Amortization [Roll Forward]
Beginning balance	13,049	18,367
Amortization	(2,028)	(2,510)
Write off of deferred financing fees		(2,116)
Ending balance	$ 11,021	$ 13,741