SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022
Cash payments:
Interest	$ 38,107	$ 36,115
Payments for income taxes, net	6,941	8,503
Operating cash payments on operating leases	4,801	4,652
Operating cash payments on finance leases	282	646
Finance cash payments on finance leases	5,223	11,297
Non cash investing and financing activities:
Accrued liabilities for purchases of property, plant and equipment	14,994	20,225
Right of use assets obtained in exchange for operating lease obligations	2,050	9,312
Right of use assets obtained in exchange for finance leases obligations	413	258
Exchange of LP Units to shares of Class A common stock	60	0
Summit Materials, LLC
Cash payments:
Interest	38,107	36,115
Payments for income taxes, net	6,941	8,503
Operating cash payments on operating leases	4,801	4,652
Operating cash payments on finance leases	282	646
Finance cash payments on finance leases	5,223	11,297
Non cash investing and financing activities:
Accrued liabilities for purchases of property, plant and equipment	14,994	20,225
Right of use assets obtained in exchange for operating lease obligations	2,050	9,312
Right of use assets obtained in exchange for finance leases obligations	$ 413	$ 258