Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021
Cash flows from operating activities:
Net income	$ 245,617	$ 109,891
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, amortization and accretion	160,162	177,841
Share-based compensation expense	15,058	14,875
Net gain on asset and business disposals	(180,240)	(19,295)
Non-cash loss on debt financings	0	2,116
Change in deferred tax asset, net	58,318	19,814
Other	(396)	(586)
Decrease (increase) in operating assets, net of acquisitions and dispositions:
Accounts receivable, net	(96,724)	(78,108)
Inventories	(53,762)	(12,002)
Costs and estimated earnings in excess of billings	(32,042)	(26,969)
Other current assets	(6,961)	(2,556)
Other assets	3,432	6,459
(Decrease) increase in operating liabilities, net of acquisitions and dispositions:
Accounts payable	44,510	33,756
Accrued expenses	(21,780)	(15,598)
Billings in excess of costs and estimated earnings	646	(2,907)
Tax receivable agreement liability	954	9,191
Other liabilities	(4,601)	(8,549)
Net cash provided by operating activities	132,191	207,373
Cash flows from investing activities:
Acquisitions, net of cash acquired	(1,933)	(7,263)
Purchases of property, plant and equipment	(189,008)	(170,070)
Proceeds from the sale of property, plant and equipment	8,298	8,827
Proceeds from sale of businesses	373,790	103,649
Other	(2,214)	(459)
Net cash provided by (used in) investing activities	188,933	(65,316)
Cash flows from financing activities:
Payments on debt	(113,769)	(323,802)
Payments on acquisition-related liabilities	(12,964)	(9,755)
Distributions from partnership	(399)	0
Repurchases of common stock	(100,980)	0
Proceeds from stock option exercises	199	32,416
Other	(774)	(951)
Net cash used in financing activities	(228,687)	(302,092)
Impact of foreign currency on cash	(1,732)	(63)
Net increase (decrease) in cash	90,705	(160,098)
Cash and cash equivalents—beginning of period	380,961	418,181
Cash and cash equivalents—end of period	471,666	258,083
Summit Materials, LLC
Cash flows from operating activities:
Net income	301,047	130,900
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, amortization and accretion	160,162	177,779
Share-based compensation expense	15,058	14,875
Net gain on asset and business disposals	(180,240)	(19,295)
Non-cash loss on debt financings	0	2,116
Change in deferred tax asset, net	3,842	8,058
Other	(396)	(586)
Decrease (increase) in operating assets, net of acquisitions and dispositions:
Accounts receivable, net	(96,724)	(78,108)
Inventories	(53,762)	(12,002)
Costs and estimated earnings in excess of billings	(32,042)	(26,969)
Other current assets	(6,961)	(2,556)
Other assets	3,432	6,459
(Decrease) increase in operating liabilities, net of acquisitions and dispositions:
Accounts payable	43,899	33,756
Accrued expenses	(21,780)	(15,598)
Billings in excess of costs and estimated earnings	646	(2,907)
Other liabilities	(4,601)	(8,549)
Net cash provided by operating activities	131,580	207,373
Cash flows from investing activities:
Acquisitions, net of cash acquired	(1,933)	(7,263)
Purchases of property, plant and equipment	(189,008)	(170,070)
Proceeds from the sale of property, plant and equipment	8,298	8,827
Proceeds from sale of businesses	373,790	103,649
Other	(2,214)	(459)
Net cash provided by (used in) investing activities	188,933	(65,316)
Cash flows from financing activities:
Capital (distributions to) contributions by member	(100,781)	32,416
Payments on debt	(113,769)	(323,802)
Payments on acquisition-related liabilities	(12,964)	(7,255)
Distributions from partnership	(34,155)	(2,500)
Other	(774)	(951)
Net cash used in financing activities	(262,443)	(302,092)
Impact of foreign currency on cash	(1,732)	(63)
Net increase (decrease) in cash	56,338	(160,098)
Cash and cash equivalents—beginning of period	380,961	418,181
Cash and cash equivalents—end of period	$ 437,299	$ 258,083