Unaudited Consolidated Statements of Cash Flows - Summit Materials Inc - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Cash flows from operating activities:
Net loss	$ (67,270)	$ (31,212)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, amortization and accretion	106,354	53,927
Share-based compensation expense	6,720	4,708
Net gain on asset and business disposals	(15,834)	(868)
Non-cash loss on debt financings	5,453	161
Change in deferred tax asset, net	(19,054)	(7,522)
Other	748	26
Decrease (increase) in operating assets, net of acquisitions and dispositions:
Accounts receivable, net	(11,127)	20,414
Inventories	(5,302)	(20,960)
Costs and estimated earnings in excess of billings	(1,799)	(7,868)
Other current assets	(1,973)	(3,748)
Other assets	4,839	2,239
(Decrease) increase in operating liabilities, net of acquisitions and dispositions:
Accounts payable	21,177	20,987
Accrued expenses	(60,842)	(27,968)
Billings in excess of costs and estimated earnings	(1,780)	(1,507)
Tax receivable agreement (benefit) expense	6,227	(531)
Other liabilities	(6,782)	57
Net cash (used in) provided by operating activities	(40,245)	335
Cash flows from investing activities:
Acquisitions, net of cash acquired	(1,100,919)	(55,477)
Purchase of intellectual property	(21,400)	0
Purchases of property, plant and equipment	(58,519)	(63,584)
Proceeds from the sale of property, plant and equipment	2,664	1,777
Proceeds from sale of businesses	75,993	0
Other	(1,240)	(1,045)
Net cash used in investing activities	(1,103,421)	(118,329)
Cash flows from financing activities:
Proceeds from debt issuances	1,007,475	0
Debt issuance costs	(17,550)	(1,566)
Payments on debt	(506,392)	(4,414)
Payments on acquisition-related liabilities	(6,124)	(11,374)
Proceeds from stock option exercises	593	15
Other	(9,260)	(5,719)
Net cash provided by (used in) financing activities	468,742	(23,058)
Impact of foreign currency on cash	(1,128)	58
Net decrease in cash and cash equivalents and restricted cash	(676,052)	(140,994)
Cash and cash equivalents and restricted cash—beginning of period	1,174,162	520,451
Cash and cash equivalents and restricted cash—end of period	$ 498,110	$ 379,457