ACQUISITIONS, DISPOSTIONS, GOODWILL AND INTANGIBLES - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 01, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Goodwill	$ 1,159,525	$ 1,132,546
Summit Materials, LLC
Business Acquisition [Line Items]
Goodwill	1,160,525	1,133,546
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Financial assets	804	297
Inventories	1,107	161
Property, plant and equipment	27,170	30,041
Other assets	91	1,116
Financial liabilities	(59)	(1,120)
Other long-term liabilities	(138)	(1,589)
Net assets acquired	28,975	28,906
Goodwill	26,910	0
Purchase price	55,885	28,906
Acquisition-related liabilities	0	(6,176)
Other	(408)	0
Net cash paid for acquisitions	55,477	22,730
Series of Individually Immaterial Business Acquisitions | Summit Materials, LLC
Business Acquisition [Line Items]
Financial assets	804	297
Inventories	1,107	161
Property, plant and equipment	27,170	30,041
Other assets	91	1,116
Financial liabilities	(59)	(1,120)
Other long-term liabilities	(138)	(1,589)
Net assets acquired	28,975	28,906
Goodwill	26,910	0
Purchase price	55,885	28,906
Acquisition-related liabilities	0	(6,176)
Other	(408)	0
Net cash paid for acquisitions	$ 55,477	$ 22,730