ACCRUED EXPENSES - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Jul. 01, 2023	Dec. 31, 2022
Schedule Of Accrued Expenses [Line Items]
Interest	$ 36,037	$ 24,625
Payroll and benefits	40,602	34,485
Finance lease obligations	3,499	6,959
Insurance	21,314	18,127
Non-income taxes	13,976	4,360
Deferred asset purchase payments	5,824	5,131
Professional fees	1,755	924
Other	25,653	25,356
Total	148,660	119,967
Summit Materials, LLC
Schedule Of Accrued Expenses [Line Items]
Interest	36,037	24,625
Payroll and benefits	40,602	34,485
Finance lease obligations	3,499	6,959
Insurance	21,314	18,127
Non-income taxes	10,061	5,101
Deferred asset purchase payments	5,824	5,131
Professional fees	1,755	924
Other	25,653	25,356
Total	$ 144,745	$ 120,708