Summit Materials (SUM) 10-Q 8 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 01, 2018
Document Information [Line Items]
Entity Registrant Name	Summit Materials, Inc.
Entity Central Index Key	1,621,563
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-29
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Membership interests description	As of May 1, 2018, 100% of Summit Materials, LLC's outstanding limited liability company interests were held by Summit Materials Intermediate Holdings, LLC, its sole member and an indirect subsidiary of Summit Materials, Inc.
Common Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		111,491,743
Common Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		100
Summit Materials, LLC
Document Information [Line Items]
Entity Registrant Name	Summit Materials, LLC
Entity Central Index Key	1,571,371
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-29
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Membership interests percentage	100.00%

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 178,293	$ 383,556
Accounts receivable, net	180,099	198,330
Costs and estimated earnings in excess of billings	12,668	9,512
Inventories	226,750	184,439
Other current assets	13,742	7,764
Total current assets	611,552	783,601
Property, plant and equipment, less accumulated depreciation, depletion and amortization (March 31, 2018 - $673,761 and December 30, 2017 - $631,841)	1,672,880	1,615,424
Goodwill	1,109,448	1,036,320
Intangible assets, less accumulated amortization (March 31, 2018 - $7,020 and December 30, 2017 - $6,698)	16,621	16,833
Deferred tax assets, less valuation allowance (March 31, 2018 and December 30, 2017 - $1,675)	297,729	284,092
Other assets	48,350	51,063
Total assets	3,756,580	3,787,333
Current liabilities:
Current portion of debt	6,354	4,765
Current portion of acquisition-related liabilities	37,101	14,087
Accounts payable	110,348	98,744
Accrued expenses	112,329	116,629
Billings in excess of costs and estimated earnings	15,131	15,750
Total current liabilities	281,263	249,975
Long-term debt	1,808,535	1,810,833
Acquisition-related liabilities	28,894	58,135
Tax receivable agreement liability	332,162	331,340
Other noncurrent liabilities	70,379	65,329
Total liabilities	2,521,233	2,515,612
Commitments and contingencies
Stockholders' equity / Member's interest
Additional paid-in capital	1,176,906	1,154,220
Accumulated earnings	42,104	95,833
Accumulated other comprehensive income (loss)	4,823	7,386
Stockholders' equity	1,224,949	1,258,543
Noncontrolling interest in Summit Materials, Inc.	10,398	13,178
Total stockholders' equity	1,235,347	1,271,721
Total liabilities and stockholders' equity / member's interest	3,756,580	3,787,333
Common Class A
Stockholders' equity / Member's interest
Common stock	1,116	1,104
Summit Materials, LLC
Current assets:
Cash and cash equivalents	178,293	383,556
Accounts receivable, net	180,099	198,330
Costs and estimated earnings in excess of billings	12,668	9,512
Inventories	226,750	184,439
Other current assets	13,742	7,764
Total current assets	611,552	783,601
Property, plant and equipment, less accumulated depreciation, depletion and amortization (March 31, 2018 - $673,761 and December 30, 2017 - $631,841)	1,672,880	1,615,424
Goodwill	1,110,448	1,037,320
Intangible assets, less accumulated amortization (March 31, 2018 - $7,020 and December 30, 2017 - $6,698)	16,621	16,833
Other assets	52,039	51,063
Total assets	3,463,540	3,504,241
Current liabilities:
Current portion of debt	6,354	4,765
Current portion of acquisition-related liabilities	34,601	11,587
Accounts payable	111,654	100,637
Accrued expenses	112,560	116,274
Billings in excess of costs and estimated earnings	15,131	15,750
Total current liabilities	280,300	249,013
Long-term debt	1,808,535	1,810,833
Acquisition-related liabilities	25,285	52,239
Other noncurrent liabilities	108,878	100,562
Total liabilities	2,222,998	2,212,647
Commitments and contingencies
Stockholders' equity / Member's interest
Member's equity	1,379,413	1,359,760
Accumulated earnings	(119,627)	(51,031)
Accumulated other comprehensive income (loss)	(19,244)	(17,135)
Total member's interest	1,240,542	1,291,594
Total liabilities and stockholders' equity / member's interest	$ 3,463,540	$ 3,504,241

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Property, plant and equipment, accumulated depreciation, depletion and amortization	$ 673,761	$ 631,841
Intangible assets, accumulated amortization	7,020	6,698
Deferred tax assets, valuation allowance	1,675	1,675
Summit Materials, LLC
Property, plant and equipment, accumulated depreciation, depletion and amortization	673,761	631,841
Intangible assets, accumulated amortization	$ 7,020	$ 6,698
Common Class A
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	111,488,573	110,350,594
Common stock, shares outstanding	111,488,573	110,350,594
Common Class B
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	100	100
Common stock, shares outstanding	100	100

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Revenue:
Product	$ 256,807	$ 225,017
Service	33,109	34,027
Net revenue	289,916	259,044
Delivery and subcontract revenue	24,505	25,233
Total revenue	314,421	284,277
Cost of revenue (excluding items shown separately below):
Product	197,433	166,968
Service	25,923	25,371
Net cost of revenue	223,356	192,339
Delivery and subcontract cost	24,505	25,233
Total cost of revenue	247,861	217,572
General and administrative expenses	69,861	58,468
Depreciation, depletion, amortization and accretion	46,958	39,748
Transaction costs	1,266	1,273
Operating income	(51,525)	(32,784)
Interest expense	28,784	24,969
Loss on debt financings		190
Other expense (income), net	7,655	657
(Loss) income from operations before taxes	(72,654)	(57,286)
Income tax benefit	(16,706)	(2,178)
Net income	(55,948)	(55,108)
Net income (loss) attributable to noncontrolling interest in subsidiaries		(98)
Net income (loss) attributable to Summit Holdings	(2,219)	(2,566)
Net income attributable to Summit Materials, Inc. / member of Summit Materials, LLC	(53,729)	(52,444)
Summit Materials, LLC
Revenue:
Product	256,807	225,017
Service	33,109	34,027
Net revenue	289,916	259,044
Delivery and subcontract revenue	24,505	25,233
Total revenue	314,421	284,277
Cost of revenue (excluding items shown separately below):
Product	197,433	166,968
Service	25,923	25,371
Net cost of revenue	223,356	192,339
Delivery and subcontract cost	24,505	25,233
Total cost of revenue	247,861	217,572
General and administrative expenses	69,861	58,468
Depreciation, depletion, amortization and accretion	46,958	39,748
Transaction costs	1,266	1,273
Operating income	(51,525)	(32,784)
Interest expense	28,570	24,715
Loss on debt financings		190
Other expense (income), net	7,655	657
(Loss) income from operations before taxes	(72,440)	(57,032)
Income tax benefit	(3,844)	(2,178)
Net income	(68,596)	(54,854)
Net income (loss) attributable to noncontrolling interest		(98)
Net income attributable to Summit Materials, Inc. / member of Summit Materials, LLC	$ (68,596)	$ (54,756)
Common Class A
Income per share of Class A common stock:
Basic	$ (0.49)	$ (0.49)
Diluted	$ (0.49)	$ (0.49)
Weighted average shares of Class A common stock:
Basic	110,659,098	106,692,717
Diluted	110,659,098	106,692,717

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Net loss	$ (55,948)	$ (55,108)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(3,104)	706
Income on cash flow hedges	995	412
Less tax effect of other comprehensive (loss) income items	520
Other comprehensive (loss) income	(2,629)	1,118
Comprehensive loss	(58,577)	(53,990)
Less comprehensive loss attributable to the noncontrolling interest in consolidated subsidiaries		(98)
Less comprehensive loss attributable Summit Holdings	(2,285)	(1,448)
Comprehensive loss attributable to Summit Materials, Inc. / Summit Materials, LLC	(56,292)	(52,444)
Summit Materials, LLC
Net loss	(68,596)	(54,854)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(3,104)	706
Income on cash flow hedges	995	412
Other comprehensive (loss) income	(2,109)	1,118
Comprehensive loss	(70,705)	(53,736)
Less comprehensive income (loss) attributable to noncontrolling interest		(98)
Comprehensive loss attributable to Summit Materials, Inc. / Summit Materials, LLC	$ (70,705)	$ (53,638)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash flow from operating activities:
Net loss	$ (55,948)	$ (55,108)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, amortization and accretion	45,559	43,343
Share-based compensation expense	8,507	4,748
Net gain on asset disposals	(4,077)	(1,665)
Non-cash loss on debt financings		85
Change in deferred tax asset, net	(17,373)	(2,337)
Other	1,579	783
Decrease (increase) in operating assets, net of acquisitions:
Accounts receivable, net	27,979	13,847
Inventories	(35,248)	(24,677)
Costs and estimated earnings in excess of billings	(2,678)	(7,480)
Other current assets	(3,202)	1,477
Other assets	747	(726)
(Decrease) increase in operating liabilities, net of acquisitions:
Accounts payable	(7,742)	4,169
Accrued expenses	(8,660)	(20,664)
Billings in excess of costs and estimated earnings	(1,788)	(2,703)
Tax receivable agreement liability	822
Other liabilities	156	1,369
Net cash used in operating activities	(51,367)	(45,539)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(113,993)	(112,333)
Purchases of property, plant and equipment	(49,505)	(51,056)
Proceeds from the sale of property, plant and equipment	7,788	4,325
Other	1,500	974
Net cash used for investing activities	(154,210)	(158,090)
Cash flow from financing activities:
Proceeds from equity offerings		237,600
Capital issuance costs		(638)
Debt issuance costs		(699)
Payments on debt	(3,972)	(3,566)
Payments on acquisition-related liabilities	(8,962)	(16,414)
Distributions from partnership	(9)	(79)
Proceeds from stock option exercises	15,475	771
Other	(1,820)	(731)
Net cash provided by financing activities	712	216,244
Impact of cash on foreign currency	(398)	100
Net increase (decrease) in cash	(205,263)	12,715
Cash and cash equivalents-beginning of period	383,556	143,392
Cash and cash equivalents-end of period	178,293	156,107
Summit Materials, LLC
Cash flow from operating activities:
Net loss	(68,596)	(54,854)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, amortization and accretion	45,345	43,088
Share-based compensation expense	8,507	4,748
Net gain on asset disposals	(4,077)	(1,665)
Non-cash loss on debt financings		85
Change in deferred tax asset, net	(3,689)	(2,354)
Other	1,579	783
Decrease (increase) in operating assets, net of acquisitions:
Accounts receivable, net	27,979	13,847
Inventories	(35,248)	(24,677)
Costs and estimated earnings in excess of billings	(2,678)	(7,480)
Other current assets	(3,202)	1,494
Other assets	747	(743)
(Decrease) increase in operating liabilities, net of acquisitions:
Accounts payable	(8,328)	3,517
Accrued expenses	(8,074)	(19,531)
Billings in excess of costs and estimated earnings	(1,788)	(2,703)
Other liabilities	156	1,369
Net cash used in operating activities	(51,367)	(45,076)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(113,993)	(112,333)
Purchases of property, plant and equipment	(49,505)	(51,056)
Proceeds from the sale of property, plant and equipment	7,788	4,325
Other	1,500	974
Net cash used for investing activities	(154,210)	(158,090)
Cash flow from financing activities:
Capital contributions by member	15,475	238,629
Capital issuance costs		(638)
Debt issuance costs		(699)
Payments on debt	(3,972)	(3,566)
Payments on acquisition-related liabilities	(6,462)	(13,914)
Distributions from partnership	(2,509)	(2,579)
Other	(1,820)	(732)
Net cash provided by financing activities	712	216,501
Impact of cash on foreign currency	(398)	100
Net increase (decrease) in cash	(205,263)	13,435
Cash and cash equivalents-beginning of period	383,556	142,672
Cash and cash equivalents-end of period	$ 178,293	$ 156,107

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity / Member's Interest and Redeemable Noncontrolling Interest - USD ($) $ in Thousands	Summit Materials, LLCMembers' equity	Summit Materials, LLCTotal Member's Interest	Summit Materials, LLCAccumulated Earnings/Deficit	Summit Materials, LLCAccumulated Other Comprehensive Operations	Summit Materials, LLC	Accumulated Earnings/Deficit	Accumulated Other Comprehensive Operations	Common StockCommon Class A	Common StockCommon Class B	Additional Paid-in Capital	Noncontrolling Interest in Summit Inc.	Common Class A	Common Class B	Total
Beginning Balance (in shares) at Dec. 31, 2016												97,554,278
Increase (decrease) in stockholders' equity / members' interest and redeemable noncontrolling interest
Net loss					$ (54,854)									$ (55,108)
LP Unit exchanges (in shares)												236,095
Other comprehensive (loss) income					1,118									1,118
Other (in shares)												134,423
Ending Balance (in shares) at Apr. 01, 2017												107,924,796
Beginning Balance at Dec. 30, 2017						$ 95,833	$ 7,386	$ 1,104		$ 1,154,220	$ 13,178			1,271,721
Beginning Balance at Dec. 30, 2017	$ 1,359,760	$ 1,291,594	$ (51,031)	$ (17,135)	1,291,594
Beginning Balance (in shares) at Dec. 30, 2017								110,350,594	100			110,350,594	100
Increase (decrease) in stockholders' equity / members' interest and redeemable noncontrolling interest
Net contributed capital	15,475	15,475
Net loss		(68,596)	(68,596)		(68,596)	(53,729)					(2,219)			(55,948)
LP Unit exchanges								$ 1		485	(486)
LP Unit exchanges (in shares)								104,104				104,104
Other comprehensive (loss) income		(2,109)		(2,109)	(2,109)		(2,563)				(66)			(2,629)
Share-based compensation	8,507	8,507								8,507				8,507
Stock Option Exercises								$ 9		15,468				15,477
Options, Exercised (in shares)								856,915
Distributions	(2,509)	(2,509)
Other								$ 2		(1,774)				(1,772)
Other (in shares)								176,960				1,033,875
Other	(1,820)	(1,820)
Distributions from partnership											(9)			(9)
Ending Balance at Mar. 31, 2018						$ 42,104	$ 4,823	$ 1,116		$ 1,176,906	$ 10,398			$ 1,235,347
Ending Balance at Mar. 31, 2018	$ 1,379,413	$ 1,240,542	$ (119,627)	$ (19,244)	$ 1,240,542
Ending Balance (in shares) at Mar. 31, 2018								111,488,573	100			111,488,573	100

Summary of Organization and Sig

Summary of Organization and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Company Information
Summary of Organization and Significant Accounting Policies	1. Summit Materials, Inc. (“Summit Inc.” and, together with its subsidiaries, “Summit,” “we,” “us,” “our” or the “Company”) is a vertically-integrated construction materials company. The Company is engaged in the production and sale of aggregates, cement, ready-mix concrete, asphalt paving mix and concrete products and owns and operates quarries, sand and gravel pits, two cement plants, cement distribution terminals, ready-mix concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company’s three operating and reporting segments are the West, East and Cement segments. Substantially all of the Company’s construction materials, products and services are produced, consumed and performed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the production and sales volumes of its products and delivery of services. Therefore, the financial results for any interim period are typically not indicative of the results expected for the full year. Furthermore, the Company’s sales and earnings are sensitive to national, regional and local economic conditions and to cyclical changes in construction spending, among other factors. On September 23, 2014, Summit Inc. was formed as a Delaware corporation to be a holding company. Its sole material asset is a controlling equity interest in Summit Materials Holdings L.P. (“Summit Holdings”). Pursuant to a reorganization into a holding company structure (the “Reorganization”) consummated in connection with Summit Inc.’s March 2015 initial public offering (“IPO”), Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries and, through Summit Holdings, conducts its business. Summit Inc. owns the majority of the partnership interests of Summit Holdings (see note 9, Stockholders’ Equity). Summit Materials, LLC (“Summit LLC”) an indirect wholly owned subsidiary of Summit Holdings, conducts the majority of our operations. Continental Cement Company, L.L.C. (“Continental Cement”) is a wholly owned subsidiary of Summit LLC. Summit Materials Finance Corp. (“Summit Finance”), an indirect wholly owned subsidiary of Summit LLC, has jointly issued our Senior Notes as described below. Basis of Presentation —These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and the notes thereto as of and for the year ended December 30, 2017. The Company continues to follow the accounting policies set forth in those audited consolidated financial statements. Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of March 31, 2018, the results of operations for the three months ended March 31, 2018 and April 1, 2017 and cash flows for the three months ended March 31, 2018 and April 1, 2017. Principles of Consolidation —The consolidated financial statements include the accounts of Summit Inc. and its majority owned subsidiaries. All intercompany balances and transactions have been eliminated. As a result of the Reorganization, Summit Holdings became a variable interest entity over which Summit Inc. has 100% voting power and control and for which Summit Inc. has the obligation to absorb losses and the right to receive benefits. For a summary of the changes in Summit Inc.’s ownership of Summit Holdings, see Note 9, Stockholders’ Equity. The Company attributes consolidated stockholders’ equity and net income separately to the controlling and noncontrolling interests. The Company accounts for investments in entities for which it has an ownership of 20% to 50% using the equity method of accounting. In October 2017, the Company acquired the 20% of Ohio Valley Asphalt, LLC held by noncontrolling interests, making it a wholly owned subsidiary. Use of Estimates —Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, valuation of deferred tax assets, goodwill, intangibles and other long-lived assets, the TRA liability, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs. Business and Credit Concentrations— The Company’s operations are conducted primarily across 23 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Utah, Kansas and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in those states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been extended to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of the Company’s total revenue in the three months ended March 31, 2018 and April 1, 2017. Revenue Recognition —We earn revenue from the sale of products, which primarily include aggregates, cement, ready-mix concrete and asphalt, but also include concrete products and plastics components, and from the provision of services, which are primarily paving and related services, but also include landfill operations, the receipt and disposal of waste that is converted to fuel for use in our cement plants and underground storage space rental. Products We earn revenue from the sale of products, which primarily include aggregates, cement, ready-mix concrete and asphalt, but also include concrete products, net of discounts or allowances, if any, and freight and delivery charges billed to customers. Freight and delivery charges associated with cement sales are recorded on a net basis together with freight costs within cost of sales. Revenue for product sales is recognized when evidence of an arrangement exists, the fee is fixed or determinable, control passes, which generally is when the product is shipped, and collection is reasonably assured. Aggregates and cement products are sold point-of-sale through purchase orders. When the product is sold on account, collectability typically occurs 30 to 60 days after the sale. Revenue is recognized when cash is received from the customer at the point of sale or when the products are delivered or collected on site. There are no other timing implications that will create a contract asset or liability, and contract modifications are unlikely given the timing and nature of the transaction. Material sales are likely to have multiple performance obligations if the product is sold with delivery. In these instances, delivery most often occurs on the same day as the control of the product transfers to the customer. As a result, even in the case of multiple performance obligations, the performance obligations are satisfied concurrently and revenue is recognized simultaneously. Services We earn revenue from the provision of services, which are primarily paving and related services, but also include landfill operations, the receipt and disposal of waste that is converted to fuel for use in our cement plants, and underground storage space rental. Revenue from the receipt of waste fuels is recognized when the waste is accepted and a corresponding liability is recognized for the costs to process the waste into fuel for the manufacturing of cement or to ship the waste offsite for disposal in accordance with applicable regulations. Collectability of service contracts is due reasonably after certain milestones in the contract are performed. Milestones vary by project, but are typically calculated using monthly progress based on the percentage of completion or a customer’s engineered review of progress. The majority of the time, collection occurs within 90 days of billing and cash is received within the same fiscal year as services performed. On most projects, the customer will withhold a portion of the invoice for retainage, which may last longer than a year depending on the job. Revenue derived from paving and related services is recognized using the input method, which approximates progress towards completion. Under the input method, we recognize paving and related services revenue as services are rendered. The majority of our construction service contracts are completed within one year, but may occasionally extend beyond this time frame. We estimate profit as the difference between total estimated revenue and total estimated cost of a contract and recognize that profit over the life of the contract based on input measures. We generally measure progress toward completion on long-term paving and related services contracts based on the proportion of costs incurred to date relative to total estimated costs at completion. We include revisions of estimated profits on contracts in earnings under the cumulative catch-up method, under which the effect of revisions in estimates is recognized immediately. If a revised estimate of contract profitability reveals an anticipated loss on the contract, we recognize the loss in the period it is identified. The input method of accounting involves the use of various estimating techniques to project costs at completion, and in some cases includes estimates of recoveries asserted against the customer for changes in specifications or other disputes. Contract estimates involve various assumptions and projections relative to the outcome of future events over multiple periods, including future labor productivity and availability, the nature and complexity of the work to be performed, the cost and availability of materials, the effect of delayed performance, and the availability and timing of funding from the customer. These estimates are based on our best judgment. A significant change in one or more of these estimates could affect the profitability of one or more of our contracts. We review our contract estimates regularly to assess revisions in contract values and estimated costs at completion. Inherent uncertainties in estimating costs make it at least reasonably possible that the estimates used will change within the near term and over the life of the contracts. No material adjustments to a contract were recognized in the three months ended March 31, 2018. We recognize claims when the amount of the claim can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. When the contract includes variable consideration, we estimate the amount of consideration to which we will be entitled in exchange for transferring the promised goods or services to a customer. The amount of estimated variable consideration included in the transaction price is the amount for which it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. Types of variable consideration include, but are not limited to, liquidated damages and other performance penalties and production and placement bonuses. The majority of contract modifications relate to the original contract and are often an extension of the original performance obligation. Predominately modifications are not distinct from the terms in the original contract; therefore, they are considered part of a single performance obligation. We account for the modification using a cumulative catch-up adjustment. However, there are instances where goods or services in a modification are distinct from those transferred prior to the modification. In these situations, we account for the modifications as either a separate contract or prospectively depending on the facts and circumstances of the modification. Generally, construction contracts contain mobilization costs which are categorized as costs to fulfill a contract. These costs are excluded from any measure of progress toward contract fulfillment. These costs do not result in the transfer of control of a good or service to the customer and are amortized over the life of the contract. Costs and estimated earnings in excess of billings are composed principally of revenue recognized on contracts on the input method for which billings had not been presented to customers because the amounts were not billable under the contract terms at the balance sheet date. In accordance with the contract terms, the unbilled receivables at the balance sheet date are expected to be billed in following periods. Billings in excess of costs and estimated earnings represent billings in excess of revenue recognized. Contract assets and liabilities are netted on a contract-by-contract basis. Earnings per Share— The Company computes basic earnings per share attributable to stockholders by dividing income attributable to Summit Inc. by the weighted-average shares of Class A common stock outstanding. Diluted earnings per share reflects the potential dilution beyond shares for basic earnings per share that could occur if securities or other contracts to issue common stock were exercised, converted into common stock, or resulted in the issuance of common stock that would have shared in the Company’s earnings. Since the Class B common stock has no economic value, those shares are not included in the weighted-average common share amount for basic or diluted earnings per share. In addition, as the shares of Class A common stock are issued by Summit Inc., the earnings and equity interests of noncontrolling interests are not included in basic earnings per share. Tax Receivable Agreement — When Class A limited partnership units of Summit Holdings (“LP Units”) are exchanged for shares of Class A common stock of Summit Inc. purchases LP Units for cash, this results in increases in Summit Inc.’s share of the tax basis of the tangible and intangible assets, which increases the tax depreciation and amortization deductions that otherwise would not have been available to Summit Inc. These increases in tax basis and tax depreciation and amortization deductions are expected to reduce the amount of cash taxes that we would otherwise be required to pay in the future. Prior to our IPO, we entered into a TRA with the pre-IPO owners that requires us to pay the pre-IPO owners 85% of the amount of cash savings, if any, in U.S. federal, state, and local income tax that we actually realize as a result of these exchanges. These benefits include (1) increases in the tax basis of tangible and intangible assets of Summit Holdings and certain other tax benefits related to entering into the TRA, (2) tax benefits attributable to payments under the TRA, or (3) under certain circumstances such as an early termination of the TRA, we are deemed to realize, as a result of the increases in tax basis in connection with exchanges by the pre-IPO owners described above and certain other tax benefits attributable to payments under the TRA. We periodically evaluate the realizability of the deferred tax assets resulting from the exchange of LP Units for Class A common stock. If the deferred tax assets are determined to be realizable, we then assess whether payment of amounts under the TRA have become probable. If so, we record a TRA liability equal to 85% of such deferred tax assets, and the remaining 15% as an increase to additional paid-in capital. If a deferred tax asset subject to the TRA is determined not to be realizable and therefore subject to a valuation allowance, we do not record a TRA liability for such deferred tax assets. In subsequent periods, we assess the realizability of all of our deferred tax assets subject to the TRA. Should we determine a deferred tax asset with a valuation allowance is realizable in a subsequent period, the related valuation allowance will be released and consideration of a corresponding TRA liability will be assessed. The realizability of deferred tax assets, including those subject to the TRA, is dependent upon the generation of future taxable income during the periods in which those deferred tax assets become deductible and consideration of prudent and feasible tax-planning strategies. The measurement of the TRA is accounted for as a contingent liability. Therefore, once we determine that a payment to a pre-IPO owner has become probable and can be estimated, the estimate of payment will be accrued. Reclassification — The Company reclassified $(2.4) million from Deferred income tax benefit and $17,000 from Other current assets to Change in deferred tax asset, net for the three months ended April 1, 2017 consolidated statements of cash flows, to conform to the current year presentation. New Accounting Standards — In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers , which prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU supersedes nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. We adopted this ASU in the first quarter of 2018 using the modified retrospective approach, which did not have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business, which narrows the definition of a business. This ASU provides a screen to determine whether a group of assets constitutes a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated as acquisitions. If the screen is not met, this ASU (1) requires that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create an output and (2) removes the evaluation of whether a market participant could replace missing elements. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the FASB has developed more stringent criteria for sets without outputs. We adopted this ASU in the first quarter of 2018 and the adoption of this ASU did not have a material impact on the consolidated financial statements.
Summit Materials, LLC
Company Information
Summary of Organization and Significant Accounting Policies	1. Summit Materials, LLC (“Summit LLC” and, together with its subsidiaries, “Summit,” “we,” “us,” “our” or the “Company”) is a vertically-integrated construction materials company. The Company is engaged in the production and sale of aggregates, cement, ready-mix concrete, asphalt paving mix and concrete products and owns and operates quarries, sand and gravel pits, two cement plants, cement distribution terminals, ready-mix concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company’s three operating and reporting segments are the West, East and Cement segments. Substantially all of the Company’s construction materials, products and services are produced, consumed and performed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the production and sales volumes of its products and delivery of services. Therefore, the financial results for any interim period are typically not indicative of the results expected for the full year. Furthermore, the Company’s sales and earnings are sensitive to national, regional and local economic conditions and to cyclical changes in construction spending, among other factors. Summit LLC is a wholly owned indirect subsidiary of Summit Materials Holdings L.P. (“Summit Holdings”), whose primary owner is Summit Materials, Inc. (“Summit Inc.”). Summit Inc. was formed as a Delaware corporation on September 23, 2014. Its sole material asset is a controlling equity interest in Summit Holdings. Pursuant to a reorganization into a holding company structure (the “Reorganization”) consummated in connection with Summit Inc.’s March 2015 initial public offering, Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries, including Summit LLC. Summit Inc. Equity Offering — On January 10, 2017, Summit Inc. raised $237.6 million, net of underwriting discounts, through the issuance of 10,000,000 shares of Class A common stock at a public offering price of $24.05 per share. Summit Inc. used these proceeds to purchase an equal number of limited partnership interests in Summit Holdings (“LP Units”) and caused Summit Holdings to use a portion of the proceeds from the offering to acquire two materials-based companies for a combined purchase price of approximately $110 million in cash . Basis of Presentation —These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto as of and for the year ended December 30, 2017. The Company continues to follow the accounting policies set forth in those audited consolidated financial statements. Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of March 31, 2018, the results of operations for the three months ended March 31, 2018 and April 1, 2017, and cash flows for the three months ended March 31, 2018 and April 1, 2017. Principles of Consolidation –The consolidated financial statements include the accounts of Summit LLC and its majority owned subsidiaries. All intercompany balances and transactions have been eliminated. The Company attributes consolidated member’s interest and net income separately to the controlling and noncontrolling interests. The Company accounts for investments in entities for which it has an ownership of 20% to 50% using the equity method of accounting. In October 2017, the Company acquired the 20% of Ohio Valley Asphalt, LLC held by noncontrolling interests, making it a wholly owned subsidiary. Use of Estimates —Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, valuation of deferred tax assets, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs. Business and Credit Concentrations— The Company’s operations are conducted primarily across 23 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Utah, Kansas and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in those states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been extended to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of the Company’s total revenue in the three months ended March 31, 2018 and April 1, 2017. Revenue Recognition —We earn revenue from the sale of products, which primarily include aggregates, cement, ready-mix concrete and asphalt, but also include concrete products and plastics components, and from the provision of services, which are primarily paving and related services, but also include landfill operations, the receipt and disposal of waste that is converted to fuel for use in our cement plants and underground storage space rental. Products We earn revenue from the sale of products, which primarily include aggregates, cement, ready-mix concrete and asphalt, but also include concrete products, net of discounts or allowances, if any, and freight and delivery charges billed to customers. Freight and delivery charges associated with cement sales are recorded on a net basis together with freight costs within cost of sales. Revenue for product sales is recognized when evidence of an arrangement exists, the fee is fixed or determinable, control passes, which generally is when the product is shipped, and collection is reasonably assured. Aggregates and cement products are sold point-of-sale through purchase orders. When the product is sold on account, collectability typically occurs 30 to 60 days after the sale. Revenue is recognized when cash is received from the customer at the point of sale or when the products are delivered or collected on site. There are no other timing implications that will create a contract asset or liability, and contract modifications are unlikely given the timing and nature of the transaction. Material sales are likely to have multiple performance obligations if the product is sold with delivery. In these instances, delivery most often occurs on the same day as the control of the product transfers to the customer. As a result, even in the case of multiple performance obligations, the performance obligations are satisfied concurrently and revenue is recognized simultaneously. Services We earn revenue from the provision of services, which are primarily paving and related services, but also include landfill operations, the receipt and disposal of waste that is converted to fuel for use in our cement plants, and underground storage space rental. Revenue from the receipt of waste fuels is recognized when the waste is accepted and a corresponding liability is recognized for the costs to process the waste into fuel for the manufacturing of cement or to ship the waste offsite for disposal in accordance with applicable regulations. Collectability of service contracts is due reasonably after certain milestones in the contract are performed. Milestones vary by project, but are typically calculated using monthly progress based on the percentage of completion or a customer’s engineered review of progress. The majority of the time, collection occurs within 90 days of billing and cash is received within the same fiscal year as services performed. On most projects, the customer will withhold a portion of the invoice for retainage, which may last longer than a year depending on the job. Revenue derived from paving and related services is recognized using the input method, which approximates progress towards completion. Under the input method, we recognize paving and related services revenue as services are rendered. The majority of our construction service contracts are completed within one year, but may occasionally extend beyond this time frame. We estimate profit as the difference between total estimated revenue and total estimated cost of a contract and recognize that profit over the life of the contract based on input measures. We generally measure progress toward completion on long-term paving and related services contracts based on the proportion of costs incurred to date relative to total estimated costs at completion. We include revisions of estimated profits on contracts in earnings under the cumulative catch-up method, under which the effect of revisions in estimates is recognized immediately. If a revised estimate of contract profitability reveals an anticipated loss on the contract, we recognize the loss in the period it is identified. The input method of accounting involves the use of various estimating techniques to project costs at completion, and in some cases includes estimates of recoveries asserted against the customer for changes in specifications or other disputes. Contract estimates involve various assumptions and projections relative to the outcome of future events over multiple periods, including future labor productivity and availability, the nature and complexity of the work to be performed, the cost and availability of materials, the effect of delayed performance, and the availability and timing of funding from the customer. These estimates are based on our best judgment. A significant change in one or more of these estimates could affect the profitability of one or more of our contracts. We review our contract estimates regularly to assess revisions in contract values and estimated costs at completion. Inherent uncertainties in estimating costs make it at least reasonably possible that the estimates used will change within the near term and over the life of the contracts. No material adjustments to a contract were recognized in the three months ended March 31, 2018. We recognize claims when the amount of the claim can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. When the contract includes variable consideration, we estimate the amount of consideration to which we will be entitled in exchange for transferring the promised goods or services to a customer. The amount of estimated variable consideration included in the transaction price is the amount for which it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. Types of variable consideration include, but are not limited to, liquidated damages and other performance penalties and production and placement bonuses. The majority of contract modifications relate to the original contract and are often an extension of the original performance obligation. Predominately modifications are not distinct from the terms in the original contract; therefore, they are considered part of a single performance obligation. We account for the modification using a cumulative catch-up adjustment. However, there are instances where goods or services in a modification are distinct from those transferred prior to the modification. In these situations, we account for the modifications as either a separate contract or prospectively depending on the facts and circumstances of the modification. Generally, construction contracts contain mobilization costs which are categorized as costs to fulfill a contract. These costs are excluded from any measure of progress toward contract fulfillment. These costs do not result in the transfer of control of a good or service to the customer and are amortized over the life of the contract. Costs and estimated earnings in excess of billings are composed principally of revenue recognized on contracts on the input method for which billings had not been presented to customers because the amounts were not billable under the contract terms at the balance sheet date. In accordance with the contract terms, the unbilled receivables at the balance sheet date are expected to be billed in following periods. Billings in excess of costs and estimated earnings represent billings in excess of revenue recognized. Contract assets and liabilities are netted on a contract-by-contract basis. New Accounting Standards — In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers , which prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU supersedes nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. We adopted this ASU in the first quarter of 2018 using the modified retrospective approach, which did not have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business, which narrows the definition of a business. This ASU provides a screen to determine whether a group of assets constitutes a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated as acquisitions. If the screen is not met, this ASU (1) requires that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create an output and (2) removes the evaluation of whether a market participant could replace missing elements. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the FASB has developed more stringent criteria for sets without outputs. We adopted this ASU in the first quarter of 2018 and the adoption of this ASU did not have a material impact on the consolidated financial statements.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2018
Acquisitions	2. Since its formation, the Company has completed numerous acquisitions, which have been financed through a combination of debt and equity funding. The operations of each acquisition have been included in the Company’s consolidated results of operations since the respective closing dates of the acquisitions. The Company measures all assets acquired and liabilities assumed at their acquisition-date fair value. The following table summarizes the Company’s acquisitions by region and period: Three months ended Year ended March 31, December 30, 2018 2017 West 2 6 East 2 8 The purchase price allocation, primarily the valuation of property, plant and equipment for the 2018 acquisitions, as well as the 2017 acquisitions that occurred after April 1, 2017, has not yet been finalized due to the recent timing of the acquisitions and status of the valuation of property, plant and equipment. The following table summarizes aggregated information regarding the fair values of the assets acquired and liabilities assumed as of the respective acquisition dates: Three months ended Year ended March 31, December 30, 2018 2017 Financial assets $ 10,372 $ 31,615 Inventories 7,233 8,300 Property, plant and equipment 41,458 160,975 Intangible assets 108 161 Other assets 2,979 4,200 Financial liabilities (9,307) (15,501) Other long-term liabilities (3,597) (17,610) Net assets acquired 49,246 172,140 Goodwill 73,274 247,536 Purchase price 122,520 419,676 Acquisition-related liabilities (8,527) (43,452) Other — (1,294) Net cash paid for acquisitions $ 113,993 $ 374,930 Changes in the carrying amount of goodwill, by reportable segment, from December 30, 2017 to March 31, 2018 are summarized as follows: West East Cement Total Balance, December 30, 2017 $ 526,290 $ 305,374 $ 204,656 $ 1,036,320 Acquisitions (1) 43,810 30,960 — 74,770 Foreign currency translation adjustments (1,642) — — (1,642) Balance, March 31, 2018 $ 568,458 $ 336,334 $ 204,656 $ 1,109,448 (1) Reflects goodwill from 2018 acquisitions and working capital adjustments from prior year acquisitions. The Company’s intangible assets are primarily composed of goodwill, lease agreements and reserve rights. The assets related to lease agreements reflect the submarket royalty rates paid under agreements, primarily for extracting aggregates. The values were determined as of the respective acquisition dates by a comparison of market-royalty rates. The reserve rights relate to aggregate reserves to which the Company has the rights of ownership, but does not own the reserves. The intangible assets are amortized on a straight-line basis over the lives of the leases. The following table shows intangible assets by type and in total: March 31, 2018 December 30, 2017 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Leases $ 15,998 $ (4,381) $ 11,617 $ 15,888 $ (4,178) $ 11,710 Reserve rights 6,234 (1,699) 4,535 6,234 (1,625) 4,609 Trade names 1,000 (783) 217 1,000 (758) 242 Other 409 (157) 252 409 (137) 272 Total intangible assets $ 23,641 $ (7,020) $ 16,621 $ 23,531 $ (6,698) $ 16,833 Amortization expense totaled $0.3 million and $0.3 million for the three months ended March 31, 2018 and April 1, 2017, respectively. The estimated amortization expense for the intangible assets for each of the five years subsequent to March 31, 2018 is as follows: 2018 (nine months) $ 938 2019 1,275 2020 1,162 2021 1,120 2022 1,120 2023 1,120 Thereafter 9,886 Total $ 16,621
Summit Materials, LLC
Acquisitions	2. Since its formation, the Company has completed numerous acquisitions, which have been financed through a combination of debt and equity funding. The operations of each acquisition have been included in the Company’s consolidated results of operations since the respective closing dates of the acquisitions. The Company measures all assets acquired and liabilities assumed at their acquisition-date fair value. The following table summarizes the Company’s acquisitions by region and period: Three months ended Year ended March 31, December 30, 2018 2017 West 2 6 East 2 8 The purchase price allocation, primarily the valuation of property, plant and equipment for the 2018 acquisitions, as well as the 2017 acquisitions that occurred after April 1, 2017, has not yet been finalized due to the recent timing of the acquisitions and status of the valuation of property, plant and equipment. The following table summarizes aggregated information regarding the fair values of the assets acquired and liabilities assumed as of the respective acquisition dates: Three months ended Year ended March 31, December 30, 2018 2017 Financial assets $ 10,372 $ 31,615 Inventories 7,233 8,300 Property, plant and equipment 41,458 160,975 Intangible assets 108 161 Other assets 2,979 4,200 Financial liabilities (9,307) (15,501) Other long-term liabilities (3,597) (17,610) Net assets acquired 49,246 172,140 Goodwill 73,274 247,536 Purchase price 122,520 419,676 Acquisition-related liabilities (8,527) (43,452) Other — (1,294) Net cash paid for acquisitions $ 113,993 $ 374,930 Changes in the carrying amount of goodwill, by reportable segment, from December 30, 2017 to March 31, 2018 are summarized as follows: West East Cement Total Balance, December 30, 2017 $ 527,290 $ 305,374 $ 204,656 $ 1,037,320 Acquisitions (1) 43,810 30,960 — 74,770 Foreign currency translation adjustments (1,642) — — (1,642) Balance, March 31, 2018 $ 569,458 $ 336,334 $ 204,656 $ 1,110,448 (1) Reflects goodwill from 2018 acquisitions and working capital adjustments from prior year acquisitions. The Company’s intangible assets are primarily composed of goodwill, lease agreements and reserve rights. The assets related to lease agreements reflect the submarket royalty rates paid under agreements, primarily, for extracting aggregates. The values were determined as of the respective acquisition dates by a comparison of market-royalty rates. The reserve rights relate to aggregate reserves to which the Company has the rights of ownership, but does not own the reserves. The intangible assets are amortized on a straight-line basis over the lives of the leases. The following table shows intangible assets by type and in total: March 31, 2018 December 30, 2017 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Leases $ 15,998 $ (4,381) $ 11,617 $ 15,888 $ (4,178) $ 11,710 Reserve rights 6,234 (1,699) 4,535 6,234 (1,625) 4,609 Trade names 1,000 (783) 217 1,000 (758) 242 Other 409 (157) 252 409 (137) 272 Total intangible assets $ 23,641 $ (7,020) $ 16,621 $ 23,531 $ (6,698) $ 16,833 Amortization expense totaled $0.3 million and $0.3 million for the three months ended March 31, 2018 and April 1, 2017, respectively. The estimated amortization expense for the intangible assets for each of the five years subsequent to March 31, 2018 is as follows: 2018 (nine months) $ 938 2019 1,275 2020 1,162 2021 1,120 2022 1,120 2023 1,120 Thereafter 9,886 Total $ 16,621

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue Recognition	3. We derive our revenue predominantly by selling construction materials, products and providing paving and related services. Construction materials consist of aggregates and cement. Products consist of related downstream products, including ready-mix concrete, asphalt paving mix and concrete products. Paving and related service revenue is generated primarily from the asphalt paving services that we provide. Revenue by product for the three months ended March 31, 2018 and April 1, 2017 is as follows: Three months ended March 31, April 1, 2018 2017 Revenue by product*: Aggregates $ 67,450 $ 61,622 Cement 33,117 39,435 Ready-mix concrete 122,015 93,177 Asphalt 18,141 19,537 Paving and related services 34,336 36,296 Other 39,362 34,210 Total revenue $ 314,421 $ 284,277 * The following table outlines the significant changes in contract assets and contract liability balances for the years ended 2018 and 2017. Also included in the table is the net change in estimate as a percentage of aggregate revenue for such contracts: Costs and estimated Billings in excess earnings in of costs and excess of billings estimated earnings Balance—December 30, 2017 $ 9,512 $ 15,750 Changes in revenue billed, contract price or cost estimates 2,678 (1,788) Acquisitions 483 1,179 Other (5) (10) Balance—March 31, 2018 $ 12,668 $ 15,131 Accounts receivable, net consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Trade accounts receivable $ 153,563 $ 137,696 Construction contract receivables 19,304 49,832 Retention receivables 12,378 14,973 Receivables from related parties 320 468 Accounts receivable 185,565 202,969 Less: Allowance for doubtful accounts (5,466) (4,639) Accounts receivable, net $ 180,099 $ 198,330 Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are generally billed and collected within one year.
Summit Materials, LLC
Revenue Recognition	3. We derive our revenue predominantly by selling construction materials, products and providing paving and related services. Construction materials consist of aggregates and cement. Products consist of related downstream products, including ready-mix concrete, asphalt paving mix and concrete products. Paving and related service revenue is generated primarily from the asphalt paving services that we provide. Revenue by product for the three months ended March 31, 2018 and April 1, 2017 is as follows: Three months ended March 31, April 1, 2018 2017 Revenue by product*: Aggregates $ 67,450 $ 61,622 Cement 33,117 39,435 Ready-mix concrete 122,015 93,177 Asphalt 18,141 19,537 Paving and related services 34,336 36,296 Other 39,362 34,210 Total revenue $ 314,421 $ 284,277 * The following table outlines the significant changes in contract assets and contract liability balances for the years ended 2018 and 2017. Also included in the table is the net change in estimate as a percentage of aggregate revenue for such contracts: Costs and estimated Billings in excess earnings in of costs and excess of billings estimated earnings Balance—December 30, 2017 $ 9,512 $ 15,750 Changes in revenue billed, contract price or cost estimates 2,678 (1,788) Acquisitions 483 1,179 Other (5) (10) Balance—March 31, 2018 $ 12,668 $ 15,131 Accounts receivable, net consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Trade accounts receivable $ 153,563 $ 137,696 Construction contract receivables 19,304 49,832 Retention receivables 12,378 14,973 Receivables from related parties 320 468 Accounts receivable 185,565 202,969 Less: Allowance for doubtful accounts (5,466) (4,639) Accounts receivable, net $ 180,099 $ 198,330 Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are generally billed and collected within one year.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2018
Inventories	4. Inventories consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Aggregate stockpiles $ 142,817 $ 126,791 Finished goods 54,258 34,667 Work in process 8,845 7,729 Raw materials 20,830 15,252 Total $ 226,750 $ 184,439
Summit Materials, LLC
Inventories	4. Inventories consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Aggregate stockpiles $ 142,817 $ 126,791 Finished goods 54,258 34,667 Work in process 8,845 7,729 Raw materials 20,830 15,252 Total $ 226,750 $ 184,439

Accrued Expenses

Accrued Expenses	3 Months Ended
	Mar. 31, 2018
Accrued Expenses	5. Accrued expenses consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Interest $ 23,547 $ 24,095 Payroll and benefits 22,278 33,915 Capital lease obligations 22,733 19,276 Insurance 11,423 11,455 Non-income taxes 9,553 7,236 Professional fees 2,785 1,717 Other (1) 20,010 18,935 Total $ 112,329 $ 116,629 (1) Consists primarily of subcontractor and working capital settlement accruals.
Summit Materials, LLC
Accrued Expenses	5. Accrued expenses consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Interest $ 23,547 $ 24,095 Payroll and benefits 22,278 33,915 Capital lease obligations 22,733 19,276 Insurance 11,423 11,455 Non-income taxes 9,784 7,467 Professional fees 2,785 1,717 Other (1) 20,010 18,349 Total $ 112,560 $ 116,274 (1) Consists primarily of subcontractor and working capital settlement accruals.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt	6. Debt consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Term Loan, due 2024: $633.8 million and $635.4 million, net of $1.5 million and $1.6 million discount at March 31, 2018 and December 30, 2017, respectively $ 632,275 $ 633,805 8 1 ⁄ 2 % Senior Notes, due 2022 250,000 250,000 6 1 ⁄ 8 % Senior Notes, due 2023: $650.0 million, net of $1.3 million and $1.4 million discount at March 31, 2018 and December 30, 2017, respectively 648,710 648,650 5 1 ⁄ 8 % Senior Notes, due 2025 300,000 300,000 Total 1,830,985 1,832,455 Current portion of long-term debt 6,354 4,765 Long-term debt $ 1,824,631 $ 1,827,690 The contractual payments of long-term debt, including current maturities, for the five years subsequent to March 31, 2018, are as follows: 2018 (nine months) $ 3,177 2019 6,354 2020 7,942 2021 6,354 2022 256,354 2023 656,354 Thereafter 897,253 Total 1,833,788 Less: Original issue net discount (2,803) Less: Capitalized loan costs (16,096) Total debt $ 1,814,889 Senior Notes —On June 1, 2017, Summit LLC and Summit Finance (together, the “Issuers”) issued $300.0 million of 5.125 % senior notes due June 1, 2025 (the “2025 Notes”). The 2025 Notes were issued at 100.0% of their par value with proceeds of $295.4 million, net of related fees and expenses. The 2025 Notes were issued under an indenture dated June 1, 2017 (as amended and supplemented, the “2017 Indenture”). The 2017 Indenture contains covenants limiting, among other things, Summit LLC and its restricted subsidiaries’ ability to incur additional indebtedness or issue certain preferred shares, pay dividends, redeem stock or make other distributions, make certain investments, sell or transfer certain assets, create liens, consolidate, merge, sell or otherwise dispose of all or substantially all of its assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The 2017 Indenture also contains customary events of default. Interest on the 2025 Notes is payable semi-annually on June 1 and December 1 of each year commencing on December 1, 2017. In 2016, the Issuers issued $250.0 million of 8.500% senior notes due April 15, 2022 (the “2022 Notes”). The 2022 Notes were issued at 100.0% of their par value with proceeds of $246.3 million, net of related fees and expenses. The 2022 Notes were issued under an indenture dated March 8, 2016, the terms of which are generally consistent with the 2017 Indenture. Interest on the 2022 Notes is payable semi-annually in arrears on April 15 and October 15 of each year. In 2015, the Issuers issued $650.0 million of 6.125% senior notes due July 2023 (the “2023 Notes” and collectively with the 2022 Notes and the 2025 Notes, the “Senior Notes”). Of the aggregate $650.0 million of 2023 Notes, $350.0 million were issued at par and $300.0 million were issued at 99.375% of par. The 2023 Notes were issued under an indenture dated July 8, 2015, the terms of which are generally consistent with the 2017 Indenture. Interest on the 2023 Notes is payable semi-annually in arrears on January 15 and July 15 of each year. As of March 31, 2018 and December 30, 2017, the Company was in compliance with all financial covenants under the applicable indentures. Senior Secured Credit Facilities — Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Under the Senior Secured Credit Facilities, required principal repayments of 0.25% of the refinanced aggregate amount of term debt are due on the last business day of each March, June, September and December commencing with the March 2018 payment. The unpaid principal balance is due in full on the maturity date, which is November 21, 2024. On January 19, 2017, Summit LLC entered into Amendment No. 1 (“Amendment No. 1”) to the credit agreement governing the Senior Secured Credit Facilities (the “Credit Agreement”), which, among other things, reduced the applicable margin in respect of then outstanding $640.3 million principal amount of term loans thereunder. All other material terms and provisions remain substantially identical to the terms and provisions in place immediately prior to the effectiveness of Amendment No. 1. On November 21, 2017, Summit LLC entered into Amendment No. 2 to the Credit Agreement, which, among other things, extended the maturity date from 2022 to 2024 and reduced the applicable margin in respect of the $635.4 million outstanding principal amount of term loans thereunder. The revolving credit facility bears interest per annum equal to, at Summit LLC’s option, either (i) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate of Bank of America, N.A. and (c) LIBOR plus 1.00%, plus an applicable margin of 2.25% for base rate loans or (ii) a LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs plus an applicable margin of 3.00% for LIBOR rate loans. There were no outstanding borrowings under the revolving credit facility as of March 31, 2018 and December 30, 2017, leaving remaining borrowing capacity of $219.6 million as of March 31, 2018, which is net of $15.4 million of outstanding letters of credit. The outstanding letters of credit are renewed annually and support required bonding on construction projects and the Company’s insurance liabilities. Summit LLC’s Consolidated First Lien Net Leverage Ratio, as such term is defined in the Credit Agreement, should be no greater than 4.75:1.0 as of each quarter-end. As of March 31, 2018 and December 30, 2017, Summit LLC was in compliance with all financial covenants. Summit LLC’s wholly-owned domestic subsidiary companies, subject to certain exclusions and exceptions, are named as subsidiary guarantors of the Senior Notes and the Senior Secured Credit Facilities. In addition, Summit LLC has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities. The following table presents the activity for the deferred financing fees for the three months ended March 31, 2018 and April 1, 2017: Deferred financing fees Balance—December 30, 2017 $ 19,033 Amortization (1,013) Balance—March 31, 2018 $ 18,020 Balance—December 31, 2016 $ 18,290 Loan origination fees 699 Amortization (917) Write off of deferred financing fees (45) Balance—April 1, 2017 $ 18,027 Other —On January 15, 2015, the Company’s wholly-owned subsidiary in British Columbia, Canada entered into an agreement with HSBC for a (i) $6.0 million Canadian dollar (“CAD”) revolving credit commitment to be used for operating activities that bears interest per annum equal to the bank’s prime rate plus 0.20%, (ii) $0.5 million CAD revolving credit commitment to be used for capital equipment that bears interest per annum at the bank’s prime rate plus 0.90% and (iii) $0.4 million CAD revolving credit commitment to provide guarantees on behalf of that subsidiary. There were no amounts outstanding under this agreement as of March 31, 2018 or December 30, 2017.
Summit Materials, LLC
Debt	6. Debt consisted of the following as of March 31, 2018 and December 30, 2017: March 31, December 30, 2018 2017 Term Loan, due 2024: $633.8 million and $635.4 million, net of $1.5 million and $1.6 million discount at March 31, 2018 and December 30, 2017, respectively $ 632,275 $ 633,805 8 1 ⁄ 2 % Senior Notes, due 2022 250,000 250,000 6 1 ⁄ 8 % Senior Notes, due 2023: $650.0 million, net of $1.3 million and $1.4 million discount at March 31, 2018 and December 30, 2017, respectively 648,710 648,650 5 1 ⁄ 8 % Senior Notes, due 2025 300,000 300,000 Total 1,830,985 1,832,455 Current portion of long-term debt 6,354 4,765 Long-term debt $ 1,824,631 $ 1,827,690 The contractual payments of long-term debt, including current maturities, for the five years subsequent to March 31, 2018, are as follows: 2018 (nine months) $ 3,177 2019 6,354 2020 7,942 2021 6,354 2022 256,354 2023 656,354 Thereafter 897,253 Total 1,833,788 Less: Original issue net discount (2,803) Less: Capitalized loan costs (16,096) Total debt $ 1,814,889 Senior Notes —On June 1, 2017, Summit LLC and Summit Materials Finance Corp., an indirect wholly-owned subsidiary of Summit LLC (“Finance Corp. ” and with Summit LLC, the “Issuers”) issued $300.0 million of 5.125% senior notes due June 1, 2025 (the “2025 Notes”). The 2025 Notes were issued at 100.0% of their par value with proceeds of $295.4 million, net of related fees and expenses. The 2025 Notes were issued under an indenture dated June 1, 2017 (as amended and supplemented, the “2017 Indenture”). The 2017 Indenture contains covenants limiting, among other things, Summit LLC and its restricted subsidiaries’ ability to incur additional indebtedness or issue certain preferred shares, pay dividends, redeem stock or make other distributions, make certain investments, sell or transfer certain assets, create liens, consolidate, merge, sell or otherwise dispose of all or substantially all of its assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The 2017 Indenture also contains customary events of default. Interest on the 2025 Notes is payable semi-annually on June 1 and December 1 of each year commencing on December 1, 2017. In 2016, the Issuers issued $250.0 million of 8.500% senior notes due April 15, 2022 (the “2022 Notes”). The 2022 Notes were issued at 100.0% of their par value with proceeds of $246.3 million, net of related fees and expenses. The 2022 Notes were issued under an indenture dated March 8, 2016, the terms of which are generally consistent with the 2017 Indenture. Interest on the 2022 Notes is payable semi-annually in arrears on April 15 and October 15 of each year. In 2015, the Issuers issued $650.0 million of 6.125% senior notes due July 2023 (the “2023 Notes” and collectively with the 2022 Notes and the 2025 Notes, the “Senior Notes”). Of the aggregate $650.0 million of 2023 Notes, $350.0 million were issued at par and $300.0 million were issued at 99.375% of par. The 2023 Notes were issued under an indenture dated July 8, 2015, the terms of which are generally consistent with the 2017 Indenture. Interest on the 2023 Notes is payable semi-annually in arrears on January 15 and July 15 of each year. As of March 31, 2018 and December 30, 2017, the Company was in compliance with all financial covenants under the applicable indentures. Senior Secured Credit Facilities — Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Under the Senior Secured Credit Facilities, required principal repayments of 0.25% of the refinanced aggregate amount of term debt are due on the last business day of each March, June, September and December, commencing with the March 2018 payment. The unpaid principal balance is due in full on the maturity date, which is November 21, 2024. On January 19, 2017, Summit LLC entered into Amendment No. 1 (“Amendment No. 1”) to the credit agreement governing the Senior Secured Credit Facilities (the “Credit Agreement”), which, among other things, reduced the applicable margin in respect of then outstanding $640.3 million principal amount of term loans thereunder. All other material terms and provisions remain substantially identical to the terms and provisions in place immediately prior to the effectiveness of Amendment No. 1. On November 21, 2017, Summit LLC entered into Amendment No. 2 to the Credit Agreement, which, among other things, extended the maturity date from 2022 to 2024 and reduced the applicable margin in respect of the $635.4 million outstanding principal amount of term loans thereunder. The revolving credit facility bears interest per annum equal to, at Summit LLC’s option, either (i) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate of Bank of America, N.A. and (c) LIBOR plus 1.00%, plus an applicable margin of 2.25% for base rate loans or (ii) a LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs plus an applicable margin of 3.00% for LIBOR rate loans. There were no outstanding borrowings under the revolving credit facility as of March 31, 2018 and December 30, 2017, leaving remaining borrowing capacity of $219.6 million as of March 31, 2018, which is net of $15.4 million of outstanding letters of credit. The outstanding letters of credit are renewed annually and support required bonding on construction projects and the Company’s insurance liabilities. Summit LLC’s Consolidated First Lien Net Leverage Ratio, as such term is defined in the Credit Agreement, should be no greater than 4.75:1.0 as of each quarter-end. As of March 31, 2018 and December 30, 2017, Summit LLC was in compliance with all financial covenants. Summit LLC’s wholly-owned domestic subsidiary companies, subject to certain exclusions and exceptions, are named as subsidiary guarantors of the Senior Notes and the Senior Secured Credit Facilities. In addition, Summit LLC has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities. The following table presents the activity for the deferred financing fees for the three months ended March 31, 2018 and April 1, 2017: Deferred financing fees Balance—December 30, 2017 $ 19,033 Amortization (1,013) Balance—March 31, 2018 $ 18,020 Balance—December 31, 2016 $ 18,290 Loan origination fees 699 Amortization (917) Write off of deferred financing fees (45) Balance—April 1, 2017 $ 18,027 Other —On January 15, 2015, the Company’s wholly-owned subsidiary in British Columbia, Canada entered into an agreement with HSBC for a (i) $6.0 million Canadian dollar (“CAD”) revolving credit commitment to be used for operating activities that bears interest per annum equal to the bank’s prime rate plus 0.20%, (ii) $0.5 million CAD revolving credit commitment to be used for capital equipment that bears interest per annum at the bank’s prime rate plus 0.90% and (iii) $0.4 million CAD revolving credit commitment to provide guarantees on behalf of that subsidiary. There were no amounts outstanding under this agreement as of March 31, 2018 or December 30, 2017.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Taxes	7. Summit Inc.’s tax provision includes its proportional share of Summit Holdings’ tax attributes. Summit Holdings’ subsidiaries are primarily limited liability companies, but do include certain entities organized as C corporations and a Canadian subsidiary. The tax attributes related to the limited liability companies are passed on to Summit Holdings and then to its partners, including Summit Inc. The tax attributes associated with the C corporation and Canadian subsidiaries are fully reflected in the Company’s accounts. Our income tax benefit was $16.7 million and $2.2 million in the three months ended March 31, 2018 and April 1, 2017, respectively. We recorded an income tax benefit in the three months ended March 31, 2018, primarily related to our loss before taxes. Our effective income tax rate was higher in the first quarter of 2018 as compared to the same period in 2017 as our deferred tax assets were subject to a valuation allowance as of April 1, 2017. The effective tax rate for Summit Inc. differs from the federal rate primarily due to (1) changes in valuation allowance for 2017, (2) tax depletion expense in excess of the expense recorded under U.S. GAAP, (3) the minority interest in the Summit Holdings partnership that is allocated outside of the Company and (4) various other items such as limitations on meals and entertainment, certain stock compensation and other costs. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible, as well as consideration of tax-planning strategies we may seek to utilize any net operating loss carryforwards scheduled to expire in the near future. Our net operating loss carryforward deferred tax assets begin to expire in 2030 and are expected to reverse before expiration. Therefore, we have not given consideration to any potential tax planning strategies as a source of future taxable income to monetize those net operating loss carryforwards. The Company will continue to monitor facts and circumstances, including our analysis of other sources of taxable income, in the reassessment of the likelihood that the tax benefit of our deferred tax assets will be realized. As of March 31, 2018 and December 30, 2017, Summit Inc. had a valuation allowance of $1.7 million, which relates to certain deferred tax assets in taxable entities where realization is not more likely than not. Tax Receivable Agreement —The Company is party to a TRA with the holders of LP Units that provides for the payment by Summit Inc. to exchanging holders of LP Units of 85% of the benefits, if any, that Summit Inc. actually realizes (or, under certain circumstances such as an early termination of the TRA, is deemed to realize) as a result of increases in the tax basis of tangible and intangible assets of Summit Holdings and certain other tax benefits related to entering into the TRA, including tax benefits attributable to payments under the TRA. In the three months ended March 31, 2018, 104,104 LP Units were acquired by Summit Inc. in exchange for an equal number of newly-issued shares of Summit Inc.’s Class A common stock. These exchanges resulted in net new deferred tax assets of approximately $1.0 million. As we determined that the deferred tax assets created from these exchanges are realizable and payment under the TRA is considered probable, we have recorded 85% of the increase in deferred tax assets as TRA liability and the remainder as an increase in additional paid in capital. As of March 31, 2018 and December 30, 2017, we had recorded $332.2 million and $331.9 million of TRA liability of which $0.6 million was classified as accrued expenses as of December 30, 2017. Tax Distributions – The holders of Summit Holdings’ LP Units, including Summit Inc., incur U.S. federal, state and local income taxes on their share of any taxable income of Summit Holdings. The limited partnership agreement of Summit Holdings provides for pro rata cash distributions (“tax distributions”) to the holders of the LP Units in an amount generally calculated to provide each holder of LP Units with sufficient cash to cover its tax liability in respect of the LP Units. In general, these tax distributions are computed based on Summit Holdings’ estimated taxable income allocated to each holder of LP Units multiplied by an assumed tax rate equal to the highest effective marginal combined U.S. federal, state and local income tax rate applicable to an individual or corporate resident in New York, New York (or a corporate resident in certain circumstances). In the three months ended March 31, 2018 and April 1, 2017, we made tax distribution payments of $9,000 and $79,000, respectively. As of March 31, 2018 and December 30, 2017, Summit Inc. and its subsidiaries had not recognized any liabilities for uncertain tax positions. The Company records interest and penalties as a component of the income tax provision. No material interest or penalties were recognized in income tax expense during the three months ended March 31, 2018 and April 1, 2017.
Summit Materials, LLC
Income Taxes	7. Summit LLC is a limited liability company and passes its tax attributes for federal and state tax purposes to its parent company and is generally not subject to federal or state income tax. However, certain subsidiary entities file federal, state and Canadian income tax returns due to their status as taxable entities in the respective jurisdiction. The effective income tax rate for the C Corporations differs from the statutory federal rate primarily due to (1) tax depletion expense in excess of the expense recorded under U.S. GAAP, (2) state income taxes and the effect of graduated tax rates and (3) various other items, such as limitations on meals and entertainment and other costs. The effective income tax rate for the Canadian subsidiary is not significantly different from its historical effective tax rate. As of March 31, 2018 and December 30, 2017, the Company had not recognized any liabilities for uncertain tax positions. The Company records interest and penalties as a component of the income tax provision. No material interest or penalties were recognized in income tax expense during the three months ended March 31, 2018 and April 1, 2017.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Net Earnings Per Share
Net Earnings Per Share	8. EARNINGS PER SHARE Basic earnings per share is computed by dividing net earnings by the weighted average common shares outstanding and diluted net earnings is computed by dividing net earnings, adjusted for changes in the earnings allocated to Summit Inc. as a result of the assumed conversion of LP Units, by the weighted-average common shares outstanding assuming dilution. The following table shows the calculation of basic earnings per share: Three months ended March 31, April 1, 2018 2017 Net loss attributable to Summit Inc. $ (53,729) $ (52,444) Weighted average shares of Class A stock outstanding 110,659,098 106,692,717 Basic loss per share $ (0.49) $ (0.49) Excluded from the above calculations were the shares noted below as they were antidilutive: Three months ended March 31, April 1, 2018 2017 Antidilutive shares: LP Units 3,585,516 4,915,202 Time-vesting stock options 3,296,133 5,311,863 Warrants 100,037 160,333 Time-vesting restricted stock units 854,482 527,393 Market-based restricted stock units 295,252 211,455

Stockholder's Equity

Stockholder's Equity	3 Months Ended
	Mar. 31, 2018
Stockholder's Equity	9. Equity Offering — On January 10, 2017, Summit Inc. raised $237.6 million, net of underwriting discounts, through the issuance of 10,000,000 shares of Class A common stock at a public offering price of $24.05 per share. Summit Inc. used these proceeds to purchase an equal number of LP Units. During 2017 and 2018, certain limited partners of Summit Holdings exchanged their LP Units for shares of Class A common stock of Summit Inc. The following table summarizes the changes in our ownership of Summit Holdings: Summit Inc. LP Units Total Summit Inc. Balance — December 30, 2017 110,350,594 3,689,620 114,040,214 96.8 % Exchanges during period 104,104 (104,104) — Other equity transactions 1,033,875 — 1,033,875 Balance — March 31, 2018 111,488,573 3,585,516 115,074,089 96.9 % Balance — December 31, 2016 97,554,278 5,151,297 102,705,575 95.0 % January 2017 public offering 10,000,000 — 10,000,000 Exchanges during period 236,095 (236,095) — Other equity transactions 134,423 — 134,423 Balance — April 1, 2017 107,924,796 4,915,202 112,839,998 95.6 % As a result of the Reorganization, Summit Inc. is Summit Holdings’ primary beneficiary and thus consolidates Summit Holdings in its consolidated financial statements with a corresponding noncontrolling interest elimination, which was 3.1% and 3.2% as of March 31, 2018 and December 30, 2017, respectively. Accumulated other comprehensive income (loss) —The changes in each component of accumulated other comprehensive income (loss) consisted of the following: Accumulated Foreign currency other Change in translation Cash flow hedge comprehensive retirement plans adjustments adjustments income (loss) Balance — December 30, 2017 $ 2,364 $ 4,637 $ 385 $ 7,386 Foreign currency translation adjustment, net of tax — (3,772) — (3,772) Income on cash flow hedges, net of tax — — 1,209 1,209 Balance — March 31, 2018 $ 2,364 $ 865 $ 1,594 $ 4,823 Balance — December 31, 2016 $ 1,450 $ (3,106) $ (593) $ (2,249) Foreign currency translation adjustment — 670 — 670 Income on cash flow hedges — — 393 393 Balance — April 1, 2017 $ 1,450 $ (2,436) $ (200) $ (1,186)
Summit Materials, LLC
Members' Interest	8. Summit Inc.’s Equity Offering — On January 10, 2017, Summit Inc. raised $237.6 million, net of underwriting discounts, through the issuance of 10,000,000 shares of Class A common stock at a public offering price of $24.05 per share. Summit Inc. used these proceeds to purchase an equal number of LP Units. Accumulated other comprehensive income (loss) —The changes in each component of accumulated other comprehensive income (loss) consisted of the following: Accumulated Foreign currency other Change in translation Cash flow hedge comprehensive retirement plans adjustments adjustments (loss) income Balance — December 30, 2017 $ (6,053) $ (10,022) $ (1,060) $ (17,135) Foreign currency translation adjustment — (3,104) — (3,104) Income on cash flow hedges — — 995 995 Balance — March 31, 2018 $ (6,053) $ (13,126) $ (65) $ (19,244) Balance — December 31, 2016 $ (7,181) $ (17,790) $ (2,473) $ (27,444) Foreign currency translation adjustment — 706 — 706 Income on cash flow hedges — — 412 412 Balance — April 1, 2017 $ (7,181) $ (17,084) $ (2,061) $ (26,326)

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2018
Supplemental Cash Flow Information	10. SUPPLEMENTAL CASH FLOW INFORMATION Supplemental cash flow information is as follows: Three months ended March 31, April 1, 2018 2017 Cash payments: Interest $ 26,927 $ 26,727 Income taxes 1,582 230 Non cash financing activities: Exchange of LP Units to shares of Class A common stock 3,325 5,753
Summit Materials, LLC
Supplemental Cash Flow Information	9. Supplemental cash flow information is as follows: Three months ended March 31, April 1, 2018 2017 Cash payments: Interest $ 26,927 $ 26,727 Income taxes 1,582 230

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies	11. COMMITMENTS AND CONTINGENCIES The Company is party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity. The Company records legal fees as incurred. Environmental Remediation and Site Restoration —The Company’s operations are subject to and affected by federal, state, provincial and local laws and regulations relating to the environment, health and safety and other regulatory matters. These operations require environmental operating permits, which are subject to modification, renewal and revocation. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s business, as it is with other companies engaged in similar businesses and there can be no assurance that environmental liabilities or noncompliance will not have a material adverse effect on the Company’s consolidated financial condition, results of operations or liquidity. The Company has asset retirement obligations arising from regulatory and contractual requirements to perform reclamation activities at the time certain quarries and landfills are closed. As of March 31, 2018 and December 30, 2017, $20.5 million and $20.5 million, respectively, were included in other noncurrent liabilities on the consolidated balance sheets and $4.0 million and $3.9 million, respectively, were included in accrued expenses for future reclamation costs. The total undiscounted anticipated costs for site reclamation as of March 31, 2018 and December 30, 2017 were $71.7 million and $67.9 million, respectively. Other —The Company is obligated under various firm purchase commitments for certain raw materials and services that are in the ordinary course of business. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial condition, results of operations and cash flows of the Company. The terms of the purchase commitments generally approximate one year.
Summit Materials, LLC
Commitments and Contingencies	10. The Company is party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity. The Company records legal fees as incurred. Environmental Remediation and Site Restoration —The Company’s operations are subject to and affected by federal, state, provincial and local laws and regulations relating to the environment, health and safety and other regulatory matters. These operations require environmental operating permits, which are subject to modification, renewal and revocation. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s business, as it is with other companies engaged in similar businesses and there can be no assurance that environmental liabilities or noncompliance will not have a material adverse effect on the Company’s consolidated financial condition, results of operations or liquidity. The Company has asset retirement obligations arising from regulatory and contractual requirements to perform reclamation activities at the time certain quarries and landfills are closed. As of March 31, 2018 and December 30, 2017, $20.5 million and $20.5 million, respectively, were included in other noncurrent liabilities on the consolidated balance sheets and $4.0 million and $3.9 million, respectively, were included in accrued expenses for future reclamation costs. The total undiscounted anticipated costs for site reclamation as of March 31, 2018 and December 30, 2017 were $71.7 million and $67.9 million, respectively. Other —The Company is obligated under various firm purchase commitments for certain raw materials and services that are in the ordinary course of business. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial condition, results of operations and cash flows of the Company. The terms of the purchase commitments generally approximate one year.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2018
Fair Value	12. Fair Value Measurements— Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. The Company has entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The interest rate derivative expires in September 2019. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of March 31, 2018 and December 30, 2017 was: March 31, December 30, 2018 2017 Current portion of acquisition-related liabilities and Accrued expenses: Contingent consideration $ 23,474 $ 594 Cash flow hedges 123 488 Acquisition-related liabilities and Other noncurrent liabilities Contingent consideration $ 4,025 $ 34,301 Cash flow hedges — 492 The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the cash flow hedges is based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments to contingent consideration or derivatives as of March 31, 2018 and April 1, 2017. Financial Instruments —The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of March 31, 2018 and December 30, 2017 was: March 31, 2018 December 30, 2017 Fair Value Carrying Value Fair Value Carrying Value Level 2 Long-term debt(1) $ 1,860,811 $ 1,830,985 $ 1,893,239 $ 1,832,455 Level 3 Current portion of deferred consideration and noncompete obligations(2) 13,627 13,627 13,493 13,493 Long term portion of deferred consideration and noncompete obligations(3) 24,869 24,869 23,834 23,834 (1) $6.4 million and $4.8 million included in current portion of debt as of March 31, 2018 and December 30, 2017, respectively. (2) Included in current portion of acquisition-related liabilities on the consolidated balance sheets. (3) Included in acquisition-related liabilities on the consolidated balance sheets. The fair value of debt was determined based on observable, or Level 2, inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk. The discount rate used is generally consistent with that used when the obligations were initially recorded. Securities with a maturity of three months or less are considered cash equivalents and the fair value of these assets approximates their carrying value.
Summit Materials, LLC
Fair Value	11. Fair Value Measurements— Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. The Company has entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The interest rate derivative expires in September 2019. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of March 31, 2018 and December 30, 2017 was: March 31, December 30, 2018 2017 Current portion of acquisition-related liabilities and Accrued expenses: Contingent consideration $ 23,474 $ 594 Cash flow hedges 123 488 Acquisition-related liabilities and Other noncurrent liabilities Contingent consideration $ 4,025 $ 34,301 Cash flow hedges — 492 The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the cash flow hedges is based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments to contingent consideration or derivatives as of March 31, 2018 and April 1, 2017. Financial Instruments —The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of March 31, 2018 and December 30, 2017 was: March 31, 2018 December 30, 2017 Fair Value Carrying Value Fair Value Carrying Value Level 2 Long-term debt(1) $ 1,860,811 $ 1,830,985 $ 1,893,239 $ 1,832,455 Level 3 Current portion of deferred consideration and noncompete obligations(2) 11,127 11,127 10,993 10,993 Long term portion of deferred consideration and noncompete obligations(3) 21,260 21,260 17,938 17,938 (1) $6.4 million and $4.8 million included in current portion of debt as of March 31, 2018 and December 30, 2017, respectively. (2) Included in current portion of acquisition-related liabilities on the consolidated balance sheets. (3) Included in acquisition-related liabilities on the consolidated balance sheets. The fair value of debt was determined based on observable, or Level 2 inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk. The discount rate used is generally consistent with that used when the obligations were initially recorded. Securities with a maturity of three months or less are considered cash equivalents and the fair value of these assets approximates their carrying value.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2018
Segment Information	13. SEGMENT INFORMATION The Company has three operating segments: West; East; and Cement, which are its reporting segments. These segments are consistent with the Company’s management reporting structure. The operating results of each segment are regularly reviewed and evaluated by the Chief Executive Officer, our Company’s Chief Operating Decision Maker (“CODM”). The CODM primarily evaluates the performance of the Company’s segments and allocates resources to them based on a segment profit metric that we call Adjusted EBITDA, which is computed as earnings from continuing operations before interest, taxes, depreciation, depletion, amortization, accretion, share-based compensation, and transaction costs, as well as various other non-recurring, non-cash amounts. The West and East segments have several acquired subsidiaries that are engaged in various activities including quarry mining, aggregate production and contracting. The Cement segment is engaged in the production of Portland cement. Assets employed by each segment include assets directly identified with those operations. Corporate assets consist primarily of cash, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment. The accounting policies applicable to each segment are consistent with those used in the consolidated financial statements. The following tables display selected financial data for the Company’s reportable business segments as of March 31, 2018 and December 30, 2017 and for the three months ended March 31, 2018 and April 1, 2017: Three months ended March 31, April 1, 2018 2017 Revenue*: West $ 181,713 $ 143,219 East 95,157 97,223 Cement 37,551 43,835 Total revenue $ 314,421 $ 284,277 * Three months ended March 31, April 1, 2018 2017 Loss from continuing operations before taxes $ (72,654) $ (57,286) Interest expense 28,784 24,969 Depreciation, depletion and amortization 46,543 39,304 Accretion 415 444 Loss on debt financings — 190 Transaction costs 1,266 1,273 Non-cash compensation 8,507 4,748 Other (7,348) (12) Total Adjusted EBITDA $ 5,513 $ 13,630 Total Adjusted EBITDA by Segment: West $ 16,173 $ 15,699 East (3,203) 4,348 Cement 3,667 2,685 Corporate and other (11,124) (9,102) Total Adjusted EBITDA $ 5,513 $ 13,630 Three months ended March 31, April 1, 2018 2017 Purchases of property, plant and equipment West $ 28,909 $ 26,562 East 14,464 15,706 Cement 4,468 7,673 Total reportable segments 47,841 49,941 Corporate and other 1,664 1,115 Total purchases of property, plant and equipment $ 49,505 $ 51,056 Three months ended March 31, April 1, 2018 2017 Depreciation, depletion, amortization and accretion: West $ 22,151 $ 15,663 East 17,727 15,378 Cement 6,370 8,048 Total reportable segments 46,248 39,089 Corporate and other 710 659 Total depreciation, depletion, amortization and accretion $ 46,958 $ 39,748 March 31, December 30, 2018 2017 Total assets: West $ 1,313,661 $ 1,225,463 East 1,083,989 1,035,609 Cement 887,737 870,652 Total reportable segments 3,285,387 3,131,724 Corporate and other 471,193 655,609 Total $ 3,756,580 $ 3,787,333
Summit Materials, LLC
Segment Information	12. The Company has three operating segments: West; East; and Cement, which are its reporting segments. These segments are consistent with the Company’s management reporting structure. The operating results of each segment are regularly reviewed and evaluated by the Chief Executive Officer, our Company’s Chief Operating Decision Maker (“CODM”). The CODM primarily evaluates the performance of the Company’s segments and allocates resources to them based on a segment profit metric that we call Adjusted EBITDA, which is computed as earnings from continuing operations before interest, taxes, depreciation, depletion, amortization, accretion, share-based compensation, and transaction costs, as well as various other non-recurring, non-cash amounts. The West and East segments have several acquired subsidiaries that are engaged in various activities including quarry mining, aggregate production and contracting. The Cement segment is engaged in the production of Portland cement. Assets employed by each segment include assets directly identified with those operations. Corporate assets consist primarily of cash, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment. The accounting policies applicable to each segment are consistent with those used in the consolidated financial statements. The following tables display selected financial data for the Company’s reportable business segments as of March 31, 2018 and December 30, 2017 and for the three months ended March 31, 2018 and April 1, 2017: Three months ended March 31, April 1, 2018 2017 Revenue*: West $ 181,713 $ 143,219 East 95,157 97,223 Cement 37,551 43,835 Total revenue $ 314,421 $ 284,277 * Three months ended March 31, April 1, 2018 2017 Loss from continuing operations before taxes $ (72,440) $ (57,032) Interest expense 28,570 24,715 Depreciation, depletion and amortization 46,543 39,304 Accretion 415 444 Loss on debt financings — 190 Transaction costs 1,266 1,273 Non-cash compensation 8,507 4,748 Other (7,348) (12) Total Adjusted EBITDA $ 5,513 $ 13,630 Total Adjusted EBITDA by Segment: West $ 16,173 $ 15,699 East (3,203) 4,348 Cement 3,667 2,685 Corporate and other (11,124) (9,102) Total Adjusted EBITDA $ 5,513 $ 13,630 Three months ended March 31, April 1, 2018 2017 Purchases of property, plant and equipment West $ 28,909 $ 26,562 East 14,464 15,706 Cement 4,468 7,673 Total reportable segments 47,841 49,941 Corporate and other 1,664 1,115 Total purchases of property, plant and equipment $ 49,505 $ 51,056 Three months ended March 31, April 1, 2018 2017 Depreciation, depletion, amortization and accretion: West $ 22,151 $ 15,663 East 17,727 15,378 Cement 6,370 8,048 Total reportable segments 46,248 39,089 Corporate and other 710 659 Total depreciation, depletion, amortization and accretion $ 46,958 $ 39,748 March 31, December 30, 2018 2017 Total assets: West $ 1,313,661 $ 1,225,463 East 1,083,989 1,035,609 Cement 887,737 870,652 Total reportable segments 3,285,387 3,131,724 Corporate and other 178,153 372,517 Total $ 3,463,540 $ 3,504,241

Senior Notes' Guarantor and Non

Senior Notes' Guarantor and Non-Guarantor Financial Information	3 Months Ended
	Mar. 31, 2018
Summit Materials, LLC
Senior Notes' Guarantor and Non-Guarantor Financial Information	13. GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION Summit LLC’s domestic wholly-owned subsidiary companies other than Finance Corp. are named as guarantors (collectively, the “Guarantors”) of the Senior Notes. Finance Corp. does not and will not have any assets or operations other than as may be incidental to its activities as a co-issuer of the Senior Notes and other indebtedness. Certain other partially-owned subsidiaries and a non-U.S. entity do not guarantee the Senior Notes (collectively, the “Non-Guarantors”). The Guarantors provide a joint and several, full and unconditional guarantee of the Senior Notes. There are no significant restrictions on Summit LLC’s ability to obtain funds from any of the Guarantor Subsidiaries in the form of dividends or loans. Additionally, there are no significant restrictions on a Guarantor Subsidiary’s ability to obtain funds from Summit LLC or its direct or indirect subsidiaries. The following condensed consolidating balance sheets, statements of operations and cash flows are provided for the Issuers, the Wholly-owned Guarantors and the Non-Guarantors. Earnings from subsidiaries are included in other income in the condensed consolidated statements of operations below. The financial information may not necessarily be indicative of the financial position, results of operations or cash flows had the guarantor or non-guarantor subsidiaries operated as independent entities. Condensed Consolidating Balance Sheets March 31, 2018 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 169,192 $ 5,949 $ 12,841 $ (9,689) $ 178,293 Accounts receivable, net — 168,155 11,988 (44) 180,099 Intercompany receivables 560,676 427,497 — (988,173) — Cost and estimated earnings in excess of billings — 12,324 344 — 12,668 Inventories — 222,277 4,473 — 226,750 Other current assets 1,232 10,977 1,533 — 13,742 Total current assets 731,100 847,179 31,179 (997,906) 611,552 Property, plant and equipment, net 10,159 1,626,147 36,574 — 1,672,880 Goodwill — 1,050,976 59,472 — 1,110,448 Intangible assets, net — 16,621 — — 16,621 Other assets 2,958,528 159,408 1,322 (3,067,219) 52,039 Total assets $ 3,699,787 $ 3,700,331 $ 128,547 $ (4,065,125) $ 3,463,540 Liabilities and Member’s Interest Current liabilities: Current portion of debt $ 6,354 $ — $ — $ — $ 6,354 Current portion of acquisition-related liabilities — 34,601 — — 34,601 Accounts payable 4,769 100,108 6,821 (44) 111,654 Accrued expenses 44,605 75,989 1,655 (9,689) 112,560 Intercompany payables 591,792 393,342 3,039 (988,173) — Billings in excess of costs and estimated earnings — 14,736 395 — 15,131 Total current liabilities 647,520 618,776 11,910 (997,906) 280,300 Long-term debt 1,808,535 — — — 1,808,535 Acquisition-related liabilities — 25,285 — — 25,285 Other noncurrent liabilities 3,190 201,719 75,286 (171,317) 108,878 Total liabilities 2,459,245 845,780 87,196 (1,169,223) 2,222,998 Total member's interest 1,240,542 2,854,551 41,351 (2,895,902) 1,240,542 Total liabilities and member’s interest $ 3,699,787 $ 3,700,331 $ 128,547 $ (4,065,125) $ 3,463,540 Condensed Consolidating Balance Sheets December 30, 2017 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 370,741 $ 10,254 $ 14,933 $ (12,372) $ 383,556 Accounts receivable, net — 183,139 15,191 — 198,330 Intercompany receivables 573,301 484,747 — (1,058,048) — Cost and estimated earnings in excess of billings — 9,264 248 — 9,512 Inventories — 180,283 4,156 — 184,439 Other current assets 1,167 6,354 243 — 7,764 Total current assets 945,209 874,041 34,771 (1,070,420) 783,601 Property, plant and equipment, net 9,259 1,569,118 37,047 — 1,615,424 Goodwill — 976,206 61,114 — 1,037,320 Intangible assets, net — 16,833 — — 16,833 Other assets 2,890,674 162,711 1,271 (3,003,593) 51,063 Total assets $ 3,845,142 $ 3,598,909 $ 134,203 $ (4,074,013) $ 3,504,241 Liabilities and Member’s Interest Current liabilities: Current portion of debt $ 4,765 $ — $ — $ — $ 4,765 Current portion of acquisition-related liabilities — 11,587 — — 11,587 Accounts payable 3,976 89,912 6,749 — 100,637 Accrued expenses 47,047 79,372 2,227 (12,372) 116,274 Intercompany payables 684,057 369,918 4,073 (1,058,048) — Billings in excess of costs and estimated earnings — 15,349 401 — 15,750 Total current liabilities 739,845 566,138 13,450 (1,070,420) 249,013 Long-term debt 1,810,833 — — — 1,810,833 Acquisition-related liabilities — 52,239 — — 52,239 Other noncurrent liabilities 2,870 193,801 75,209 (171,318) 100,562 Total liabilities 2,553,548 812,178 88,659 (1,241,738) 2,212,647 Total member's interest 1,291,594 2,786,731 45,544 (2,832,275) 1,291,594 Total liabilities and member’s interest $ 3,845,142 $ 3,598,909 $ 134,203 $ (4,074,013) $ 3,504,241 Condensed Consolidating Statements of Operations For the three months ended March 31, 2018 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Revenue $ — $ 300,658 $ 15,181 $ (1,418) $ 314,421 Cost of revenue (excluding items shown separately below) — 238,127 11,152 (1,418) 247,861 General and administrative expenses 20,947 47,177 3,003 — 71,127 Depreciation, depletion, amortization and accretion 710 44,993 1,255 — 46,958 Operating loss (21,657) (29,639) (229) — (51,525) Other income, net 17,365 (6,858) 51 (18,213) (7,655) Interest expense (income) 29,582 (2,203) 1,191 — 28,570 Loss from operations before taxes (68,604) (20,578) (1,471) 18,213 (72,440) Income tax expense (8) (3,454) (382) — (3,844) Net loss attributable to member of Summit Materials, LLC $ (68,596) $ (17,124) $ (1,089) $ 18,213 $ (68,596) Comprehensive (loss) income attributable to member of Summit Materials, LLC $ (70,705) $ (18,119) $ 2,015 $ 16,104 $ (70,705) Condensed Consolidating Statements of Operations For the three months ended April 1, 2017 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Revenue $ — 276,375 9,410 (1,508) $ 284,277 Cost of revenue (excluding items shown separately below) — 211,992 7,088 (1,508) 217,572 General and administrative expenses 15,050 43,373 1,318 — 59,741 Depreciation, depletion, amortization and accretion 658 38,439 651 — 39,748 Operating (loss) income (15,708) (17,429) 353 — (32,784) Other expense (income), net 15,410 235 (35) (16,077) (467) Interest expense 23,638 213 864 — 24,715 Loss from operations before taxes (54,756) (17,877) (476) 16,077 (57,032) Income (benefit) tax benefit — (2,180) 2 — (2,178) Net loss (54,756) (15,697) (478) 16,077 (54,854) Net loss attributable to noncontrolling interest — — — (98) (98) Net loss attributable to member of Summit Materials, LLC $ (54,756) $ (15,697) $ (478) $ 16,175 $ (54,756) Comprehensive loss attributable to member of Summit Materials, LLC $ (53,638) $ (16,109) $ (1,184) $ 17,293 $ (53,638) Condensed Consolidating Statements of Cash Flows For the three months ended March 31, 2018 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Net cash (used in) provided by operating activities $ (38,210) $ (15,050) $ 1,893 $ — $ (51,367) Cash flow from investing activities: Acquisitions, net of cash acquired — (113,993) — — (113,993) Purchase of property, plant and equipment (1,664) (46,363) (1,478) — (49,505) Proceeds from the sale of property, plant, and equipment — 7,668 120 — 7,788 Other — 1,500 — — 1,500 Net cash used for investing activities (1,664) (151,188) (1,358) — (154,210) Cash flow from financing activities: Proceeds from investment by member (73,661) 89,136 — — 15,475 Loans received from and payments made on loans from other Summit Companies (83,090) 82,599 (2,192) 2,683 — Payments on long-term debt (1,588) (2,380) (4) — (3,972) Payments on acquisition-related liabilities — (6,462) — — (6,462) Distributions from partnership (2,509) — — — (2,509) Other (827) (960) (33) — (1,820) Net cash (used in) provided by financing activities (161,675) 161,933 (2,229) 2,683 712 Impact of cash on foreign currency — — (398) — (398) Net decrease in cash (201,549) (4,305) (2,092) 2,683 (205,263) Cash — Beginning of period 370,741 10,254 14,933 (12,372) 383,556 Cash — End of period $ 169,192 $ 5,949 $ 12,841 $ (9,689) $ 178,293 Condensed Consolidating Statements of Cash Flows For the three months ended April 1, 2017 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Net cash (used in) provided by operating activities $ (42,891) $ (4,035) $ 1,850 $ — $ (45,076) Cash flow from investing activities: Acquisitions, net of cash acquired — (112,333) — — (112,333) Purchase of property, plant and equipment (1,115) (49,931) (10) — (51,056) Proceeds from the sale of property, plant, and equipment — 4,325 — — 4,325 Other — 974 — — 974 Net cash used for investing activities (1,115) (156,965) (10) — (158,090) Cash flow from financing activities: Proceeds from investment by member 164,795 73,834 — — 238,629 Capital issuance costs (638) — — — (638) Loans received from and payments made on loans from other Summit Companies (92,904) 101,616 (154) (8,558) — Payments on long-term debt (1,625) (1,941) — — (3,566) Payments on acquisition-related liabilities — (13,914) — — (13,914) Financing costs (699) — — — (699) Distributions from partnership (2,579) — — — (2,579) Other (319) (392) (21) — (732) Net cash provided by (used in) financing activities 66,031 159,203 (154) (8,558) 216,501 Impact of cash on foreign currency — — 100 — 100 Net increase (decrease) in cash 22,025 (1,797) 1,786 (8,558) 13,435 Cash — Beginning of period 133,862 4,820 14,656 (10,666) 142,672 Cash — End of period $ 155,887 $ 3,023 $ 16,442 $ (19,224) $ 156,107

Summary of Organization and S22

Summary of Organization and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Company Information
Initial Public Offering	On September 23, 2014, Summit Inc. was formed as a Delaware corporation to be a holding company. Its sole material asset is a controlling equity interest in Summit Materials Holdings L.P. (“Summit Holdings”). Pursuant to a reorganization into a holding company structure (the “Reorganization”) consummated in connection with Summit Inc.’s March 2015 initial public offering (“IPO”), Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries and, through Summit Holdings, conducts its business. Summit Inc. owns the majority of the partnership interests of Summit Holdings (see note 9, Stockholders’ Equity). Summit Materials, LLC (“Summit LLC”) an indirect wholly owned subsidiary of Summit Holdings, conducts the majority of our operations. Continental Cement Company, L.L.C. (“Continental Cement”) is a wholly owned subsidiary of Summit LLC. Summit Materials Finance Corp. (“Summit Finance”), an indirect wholly owned subsidiary of Summit LLC, has jointly issued our Senior Notes as described below.
Principles of Consolidation	Principles of Consolidation —The consolidated financial statements include the accounts of Summit Inc. and its majority owned subsidiaries. All intercompany balances and transactions have been eliminated. As a result of the Reorganization, Summit Holdings became a variable interest entity over which Summit Inc. has 100% voting power and control and for which Summit Inc. has the obligation to absorb losses and the right to receive benefits. For a summary of the changes in Summit Inc.’s ownership of Summit Holdings, see Note 9, Stockholders’ Equity. The Company attributes consolidated stockholders’ equity and net income separately to the controlling and noncontrolling interests. The Company accounts for investments in entities for which it has an ownership of 20% to 50% using the equity method of accounting. In October 2017, the Company acquired the 20% of Ohio Valley Asphalt, LLC held by noncontrolling interests, making it a wholly owned subsidiary.
Earnings per Share	Earnings per Share— The Company computes basic earnings per share attributable to stockholders by dividing income attributable to Summit Inc. by the weighted-average shares of Class A common stock outstanding. Diluted earnings per share reflects the potential dilution beyond shares for basic earnings per share that could occur if securities or other contracts to issue common stock were exercised, converted into common stock, or resulted in the issuance of common stock that would have shared in the Company’s earnings. Since the Class B common stock has no economic value, those shares are not included in the weighted-average common share amount for basic or diluted earnings per share. In addition, as the shares of Class A common stock are issued by Summit Inc., the earnings and equity interests of noncontrolling interests are not included in basic earnings per share.
Summit Materials, LLC
Company Information
Initial Public Offering	Summit LLC is a wholly owned indirect subsidiary of Summit Materials Holdings L.P. (“Summit Holdings”), whose primary owner is Summit Materials, Inc. (“Summit Inc.”). Summit Inc. was formed as a Delaware corporation on September 23, 2014. Its sole material asset is a controlling equity interest in Summit Holdings. Pursuant to a reorganization into a holding company structure (the “Reorganization”) consummated in connection with Summit Inc.’s March 2015 initial public offering, Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries, including Summit LLC.
Follow-On Offering	On January 10, 2017, Summit Inc. raised $237.6 million, net of underwriting discounts, through the issuance of 10,000,000 shares of Class A common stock at a public offering price of $24.05 per share. Summit Inc. used these proceeds to purchase an equal number of limited partnership interests in Summit Holdings (“LP Units”) and caused Summit Holdings to use a portion of the proceeds from the offering to acquire two materials-based companies for a combined purchase price of approximately $110 million in cash .
Basis of Presentation	Basis of Presentation —These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto as of and for the year ended December 30, 2017. The Company continues to follow the accounting policies set forth in those audited consolidated financial statements. Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of March 31, 2018, the results of operations for the three months ended March 31, 2018 and April 1, 2017, and cash flows for the three months ended March 31, 2018 and April 1, 2017.
Use of Estimates	Use of Estimates —Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, valuation of deferred tax assets, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2018
Summary of Acquisitions by Region	Three months ended Year ended March 31, December 30, 2018 2017 West 2 6 East 2 8
Summary of Assets Acquired and Liabilities Assumed	Three months ended Year ended March 31, December 30, 2018 2017 Financial assets $ 10,372 $ 31,615 Inventories 7,233 8,300 Property, plant and equipment 41,458 160,975 Intangible assets 108 161 Other assets 2,979 4,200 Financial liabilities (9,307) (15,501) Other long-term liabilities (3,597) (17,610) Net assets acquired 49,246 172,140 Goodwill 73,274 247,536 Purchase price 122,520 419,676 Acquisition-related liabilities (8,527) (43,452) Other — (1,294) Net cash paid for acquisitions $ 113,993 $ 374,930
Goodwill by Reportable Segment and in Total	West East Cement Total Balance, December 30, 2017 $ 526,290 $ 305,374 $ 204,656 $ 1,036,320 Acquisitions (1) 43,810 30,960 — 74,770 Foreign currency translation adjustments (1,642) — — (1,642) Balance, March 31, 2018 $ 568,458 $ 336,334 $ 204,656 $ 1,109,448 (1) Reflects goodwill from 2018 acquisitions and working capital adjustments from prior year acquisitions.
Intangible Assets by Type and in Total	March 31, 2018 December 30, 2017 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Leases $ 15,998 $ (4,381) $ 11,617 $ 15,888 $ (4,178) $ 11,710 Reserve rights 6,234 (1,699) 4,535 6,234 (1,625) 4,609 Trade names 1,000 (783) 217 1,000 (758) 242 Other 409 (157) 252 409 (137) 272 Total intangible assets $ 23,641 $ (7,020) $ 16,621 $ 23,531 $ (6,698) $ 16,833
Estimated Amortization Expense for Intangible Assets	The estimated amortization expense for the intangible assets for each of the five years subsequent to March 31, 2018 is as follows: 2018 (nine months) $ 938 2019 1,275 2020 1,162 2021 1,120 2022 1,120 2023 1,120 Thereafter 9,886 Total $ 16,621
Summit Materials, LLC
Summary of Acquisitions by Region	Three months ended Year ended March 31, December 30, 2018 2017 West 2 6 East 2 8
Summary of Assets Acquired and Liabilities Assumed	Three months ended Year ended March 31, December 30, 2018 2017 Financial assets $ 10,372 $ 31,615 Inventories 7,233 8,300 Property, plant and equipment 41,458 160,975 Intangible assets 108 161 Other assets 2,979 4,200 Financial liabilities (9,307) (15,501) Other long-term liabilities (3,597) (17,610) Net assets acquired 49,246 172,140 Goodwill 73,274 247,536 Purchase price 122,520 419,676 Acquisition-related liabilities (8,527) (43,452) Other — (1,294) Net cash paid for acquisitions $ 113,993 $ 374,930
Goodwill by Reportable Segment and in Total	West East Cement Total Balance, December 30, 2017 $ 527,290 $ 305,374 $ 204,656 $ 1,037,320 Acquisitions (1) 43,810 30,960 — 74,770 Foreign currency translation adjustments (1,642) — — (1,642) Balance, March 31, 2018 $ 569,458 $ 336,334 $ 204,656 $ 1,110,448 (1) Reflects goodwill from 2018 acquisitions and working capital adjustments from prior year acquisitions.
Intangible Assets by Type and in Total	March 31, 2018 December 30, 2017 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Leases $ 15,998 $ (4,381) $ 11,617 $ 15,888 $ (4,178) $ 11,710 Reserve rights 6,234 (1,699) 4,535 6,234 (1,625) 4,609 Trade names 1,000 (783) 217 1,000 (758) 242 Other 409 (157) 252 409 (137) 272 Total intangible assets $ 23,641 $ (7,020) $ 16,621 $ 23,531 $ (6,698) $ 16,833
Estimated Amortization Expense for Intangible Assets	. The estimated amortization expense for the intangible assets for each of the five years subsequent to March 31, 2018 is as follows: 2018 (nine months) $ 938 2019 1,275 2020 1,162 2021 1,120 2022 1,120 2023 1,120 Thereafter 9,886 Total $ 16,621

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue by Product	Three months ended March 31, April 1, 2018 2017 Revenue by product*: Aggregates $ 67,450 $ 61,622 Cement 33,117 39,435 Ready-mix concrete 122,015 93,177 Asphalt 18,141 19,537 Paving and related services 34,336 36,296 Other 39,362 34,210 Total revenue $ 314,421 $ 284,277 *
Schedule of Contract Asset and Liability	Costs and estimated Billings in excess earnings in of costs and excess of billings estimated earnings Balance—December 30, 2017 $ 9,512 $ 15,750 Changes in revenue billed, contract price or cost estimates 2,678 (1,788) Acquisitions 483 1,179 Other (5) (10) Balance—March 31, 2018 $ 12,668 $ 15,131
Summary of Accounts Receivable, Net	March 31, December 30, 2018 2017 Trade accounts receivable $ 153,563 $ 137,696 Construction contract receivables 19,304 49,832 Retention receivables 12,378 14,973 Receivables from related parties 320 468 Accounts receivable 185,565 202,969 Less: Allowance for doubtful accounts (5,466) (4,639) Accounts receivable, net $ 180,099 $ 198,330
Summit Materials, LLC
Revenue by Product	Three months ended March 31, April 1, 2018 2017 Revenue by product*: Aggregates $ 67,450 $ 61,622 Cement 33,117 39,435 Ready-mix concrete 122,015 93,177 Asphalt 18,141 19,537 Paving and related services 34,336 36,296 Other 39,362 34,210 Total revenue $ 314,421 $ 284,277 *
Schedule of Contract Asset and Liability	Costs and estimated Billings in excess earnings in of costs and excess of billings estimated earnings Balance—December 30, 2017 $ 9,512 $ 15,750 Changes in revenue billed, contract price or cost estimates 2,678 (1,788) Acquisitions 483 1,179 Other (5) (10) Balance—March 31, 2018 $ 12,668 $ 15,131
Summary of Accounts Receivable, Net	March 31, December 30, 2018 2017 Trade accounts receivable $ 153,563 $ 137,696 Construction contract receivables 19,304 49,832 Retention receivables 12,378 14,973 Receivables from related parties 320 468 Accounts receivable 185,565 202,969 Less: Allowance for doubtful accounts (5,466) (4,639) Accounts receivable, net $ 180,099 $ 198,330

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2018
Components of Inventories	March 31, December 30, 2018 2017 Aggregate stockpiles $ 142,817 $ 126,791 Finished goods 54,258 34,667 Work in process 8,845 7,729 Raw materials 20,830 15,252 Total $ 226,750 $ 184,439
Summit Materials, LLC
Components of Inventories	March 31, December 30, 2018 2017 Aggregate stockpiles $ 142,817 $ 126,791 Finished goods 54,258 34,667 Work in process 8,845 7,729 Raw materials 20,830 15,252 Total $ 226,750 $ 184,439

Accrued Expenses (Tables)

Accrued Expenses (Tables)	3 Months Ended
	Mar. 31, 2018
Components of Accrued Expenses	March 31, December 30, 2018 2017 Interest $ 23,547 $ 24,095 Payroll and benefits 22,278 33,915 Capital lease obligations 22,733 19,276 Insurance 11,423 11,455 Non-income taxes 9,553 7,236 Professional fees 2,785 1,717 Other (1) 20,010 18,935 Total $ 112,329 $ 116,629 Consists primarily of subcontractor and working capital settlement accruals.
Summit Materials, LLC
Components of Accrued Expenses	March 31, December 30, 2018 2017 Interest $ 23,547 $ 24,095 Payroll and benefits 22,278 33,915 Capital lease obligations 22,733 19,276 Insurance 11,423 11,455 Non-income taxes 9,784 7,467 Professional fees 2,785 1,717 Other (1) 20,010 18,349 Total $ 112,560 $ 116,274 Consists primarily of subcontractor and working capital settlement accruals.

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Schedule of Debt	March 31, December 30, 2018 2017 Term Loan, due 2024: $633.8 million and $635.4 million, net of $1.5 million and $1.6 million discount at March 31, 2018 and December 30, 2017, respectively $ 632,275 $ 633,805 8 1 ⁄ 2 % Senior Notes, due 2022 250,000 250,000 6 1 ⁄ 8 % Senior Notes, due 2023: $650.0 million, net of $1.3 million and $1.4 million discount at March 31, 2018 and December 30, 2017, respectively 648,710 648,650 5 1 ⁄ 8 % Senior Notes, due 2025 300,000 300,000 Total 1,830,985 1,832,455 Current portion of long-term debt 6,354 4,765 Long-term debt $ 1,824,631 $ 1,827,690
Schedule of Contractual Payments of Long-Term Debt	The contractual payments of long-term debt, including current maturities, for the five years subsequent to March 31, 2018, are as follows: 2018 (nine months) $ 3,177 2019 6,354 2020 7,942 2021 6,354 2022 256,354 2023 656,354 Thereafter 897,253 Total 1,833,788 Less: Original issue net discount (2,803) Less: Capitalized loan costs (16,096) Total debt $ 1,814,889
Summary of Activity for Deferred Financing Fees	Deferred financing fees Balance—December 30, 2017 $ 19,033 Amortization (1,013) Balance—March 31, 2018 $ 18,020 Balance—December 31, 2016 $ 18,290 Loan origination fees 699 Amortization (917) Write off of deferred financing fees (45) Balance—April 1, 2017 $ 18,027
Summit Materials, LLC
Schedule of Debt	March 31, December 30, 2018 2017 Term Loan, due 2024: $633.8 million and $635.4 million, net of $1.5 million and $1.6 million discount at March 31, 2018 and December 30, 2017, respectively $ 632,275 $ 633,805 8 1 ⁄ 2 % Senior Notes, due 2022 250,000 250,000 6 1 ⁄ 8 % Senior Notes, due 2023: $650.0 million, net of $1.3 million and $1.4 million discount at March 31, 2018 and December 30, 2017, respectively 648,710 648,650 5 1 ⁄ 8 % Senior Notes, due 2025 300,000 300,000 Total 1,830,985 1,832,455 Current portion of long-term debt 6,354 4,765 Long-term debt $ 1,824,631 $ 1,827,690
Schedule of Contractual Payments of Long-Term Debt	The contractual payments of long-term debt, including current maturities, for the five years subsequent to March 31, 2018, are as follows: 2018 (nine months) $ 3,177 2019 6,354 2020 7,942 2021 6,354 2022 256,354 2023 656,354 Thereafter 897,253 Total 1,833,788 Less: Original issue net discount (2,803) Less: Capitalized loan costs (16,096) Total debt $ 1,814,889
Summary of Activity for Deferred Financing Fees	Deferred financing fees Balance—December 30, 2017 $ 19,033 Amortization (1,013) Balance—March 31, 2018 $ 18,020 Balance—December 31, 2016 $ 18,290 Loan origination fees 699 Amortization (917) Write off of deferred financing fees (45) Balance—April 1, 2017 $ 18,027

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Net Earnings Per Share
Schedule of Basic Earnings Per Share	Three months ended March 31, April 1, 2018 2017 Net loss attributable to Summit Inc. $ (53,729) $ (52,444) Weighted average shares of Class A stock outstanding 110,659,098 106,692,717 Basic loss per share $ (0.49) $ (0.49)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	Three months ended March 31, April 1, 2018 2017 Antidilutive shares: LP Units 3,585,516 4,915,202 Time-vesting stock options 3,296,133 5,311,863 Warrants 100,037 160,333 Time-vesting restricted stock units 854,482 527,393 Market-based restricted stock units 295,252 211,455

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Company Information
Schedule of changes in ownership of Summit Holdings	Summit Inc. LP Units Total Summit Inc. Balance — December 30, 2017 110,350,594 3,689,620 114,040,214 96.8 % Exchanges during period 104,104 (104,104) — Other equity transactions 1,033,875 — 1,033,875 Balance — March 31, 2018 111,488,573 3,585,516 115,074,089 96.9 % Balance — December 31, 2016 97,554,278 5,151,297 102,705,575 95.0 % January 2017 public offering 10,000,000 — 10,000,000 Exchanges during period 236,095 (236,095) — Other equity transactions 134,423 — 134,423 Balance — April 1, 2017 107,924,796 4,915,202 112,839,998 95.6 %
Schedule of Changes in Each Component of Accumulated Other Comprehensive Income (Loss)	Accumulated Foreign currency other Change in translation Cash flow hedge comprehensive retirement plans adjustments adjustments income (loss) Balance — December 30, 2017 $ 2,364 $ 4,637 $ 385 $ 7,386 Foreign currency translation adjustment, net of tax — (3,772) — (3,772) Income on cash flow hedges, net of tax — — 1,209 1,209 Balance — March 31, 2018 $ 2,364 $ 865 $ 1,594 $ 4,823 Balance — December 31, 2016 $ 1,450 $ (3,106) $ (593) $ (2,249) Foreign currency translation adjustment — 670 — 670 Income on cash flow hedges — — 393 393 Balance — April 1, 2017 $ 1,450 $ (2,436) $ (200) $ (1,186)
Summit Materials, LLC
Company Information
Schedule of Changes in Each Component of Accumulated Other Comprehensive Income (Loss)	Accumulated Foreign currency other Change in translation Cash flow hedge comprehensive retirement plans adjustments adjustments (loss) income Balance — December 30, 2017 $ (6,053) $ (10,022) $ (1,060) $ (17,135) Foreign currency translation adjustment — (3,104) — (3,104) Income on cash flow hedges — — 995 995 Balance — March 31, 2018 $ (6,053) $ (13,126) $ (65) $ (19,244) Balance — December 31, 2016 $ (7,181) $ (17,790) $ (2,473) $ (27,444) Foreign currency translation adjustment — 706 — 706 Income on cash flow hedges — — 412 412 Balance — April 1, 2017 $ (7,181) $ (17,084) $ (2,061) $ (26,326)

Supplemental Cash Flow Inform30

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2018
Schedule of Supplemental Cash Flow Information	Three months ended March 31, April 1, 2018 2017 Cash payments: Interest $ 26,927 $ 26,727 Income taxes 1,582 230 Non cash financing activities: Exchange of LP Units to shares of Class A common stock 3,325 5,753
Summit Materials, LLC
Schedule of Supplemental Cash Flow Information	Three months ended March 31, April 1, 2018 2017 Cash payments: Interest $ 26,927 $ 26,727 Income taxes 1,582 230

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2018
Schedule of Contingent Consideration and Derivatives Measured at Fair Value	March 31, December 30, 2018 2017 Current portion of acquisition-related liabilities and Accrued expenses: Contingent consideration $ 23,474 $ 594 Cash flow hedges 123 488 Acquisition-related liabilities and Other noncurrent liabilities Contingent consideration $ 4,025 $ 34,301 Cash flow hedges — 492
Schedule of Carrying Value and Fair Value of Financial Instruments	March 31, 2018 December 30, 2017 Fair Value Carrying Value Fair Value Carrying Value Level 2 Long-term debt(1) $ 1,860,811 $ 1,830,985 $ 1,893,239 $ 1,832,455 Level 3 Current portion of deferred consideration and noncompete obligations(2) 13,627 13,627 13,493 13,493 Long term portion of deferred consideration and noncompete obligations(3) 24,869 24,869 23,834 23,834 (1) $6.4 million and $4.8 million included in current portion of debt as of March 31, 2018 and December 30, 2017, respectively. (2) Included in current portion of acquisition-related liabilities on the consolidated balance sheets. (3) Included in acquisition-related liabilities on the consolidated balance sheets.
Summit Materials, LLC
Schedule of Contingent Consideration and Derivatives Measured at Fair Value	March 31, December 30, 2018 2017 Current portion of acquisition-related liabilities and Accrued expenses: Contingent consideration $ 23,474 $ 594 Cash flow hedges 123 488 Acquisition-related liabilities and Other noncurrent liabilities Contingent consideration $ 4,025 $ 34,301 Cash flow hedges — 492
Schedule of Carrying Value and Fair Value of Financial Instruments	March 31, 2018 December 30, 2017 Fair Value Carrying Value Fair Value Carrying Value Level 2 Long-term debt(1) $ 1,860,811 $ 1,830,985 $ 1,893,239 $ 1,832,455 Level 3 Current portion of deferred consideration and noncompete obligations(2) 11,127 11,127 10,993 10,993 Long term portion of deferred consideration and noncompete obligations(3) 21,260 21,260 17,938 17,938 (1) $6.4 million and $4.8 million included in current portion of debt as of March 31, 2018 and December 30, 2017, respectively. (2) Included in current portion of acquisition-related liabilities on the consolidated balance sheets. (3) Included in acquisition-related liabilities on the consolidated balance sheets.

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2018
Summary of Financial Data for Company's Reportable Business Segments	Three months ended March 31, April 1, 2018 2017 Revenue*: West $ 181,713 $ 143,219 East 95,157 97,223 Cement 37,551 43,835 Total revenue $ 314,421 $ 284,277 * Three months ended March 31, April 1, 2018 2017 Loss from continuing operations before taxes $ (72,654) $ (57,286) Interest expense 28,784 24,969 Depreciation, depletion and amortization 46,543 39,304 Accretion 415 444 Loss on debt financings — 190 Transaction costs 1,266 1,273 Non-cash compensation 8,507 4,748 Other (7,348) (12) Total Adjusted EBITDA $ 5,513 $ 13,630 Total Adjusted EBITDA by Segment: West $ 16,173 $ 15,699 East (3,203) 4,348 Cement 3,667 2,685 Corporate and other (11,124) (9,102) Total Adjusted EBITDA $ 5,513 $ 13,630 Three months ended March 31, April 1, 2018 2017 Purchases of property, plant and equipment West $ 28,909 $ 26,562 East 14,464 15,706 Cement 4,468 7,673 Total reportable segments 47,841 49,941 Corporate and other 1,664 1,115 Total purchases of property, plant and equipment $ 49,505 $ 51,056 Three months ended March 31, April 1, 2018 2017 Depreciation, depletion, amortization and accretion: West $ 22,151 $ 15,663 East 17,727 15,378 Cement 6,370 8,048 Total reportable segments 46,248 39,089 Corporate and other 710 659 Total depreciation, depletion, amortization and accretion $ 46,958 $ 39,748 March 31, December 30, 2018 2017 Total assets: West $ 1,313,661 $ 1,225,463 East 1,083,989 1,035,609 Cement 887,737 870,652 Total reportable segments 3,285,387 3,131,724 Corporate and other 471,193 655,609 Total $ 3,756,580 $ 3,787,333
Summit Materials, LLC
Summary of Financial Data for Company's Reportable Business Segments	Three months ended March 31, April 1, 2018 2017 Revenue*: West $ 181,713 $ 143,219 East 95,157 97,223 Cement 37,551 43,835 Total revenue $ 314,421 $ 284,277 * Three months ended March 31, April 1, 2018 2017 Loss from continuing operations before taxes $ (72,440) $ (57,032) Interest expense 28,570 24,715 Depreciation, depletion and amortization 46,543 39,304 Accretion 415 444 Loss on debt financings — 190 Transaction costs 1,266 1,273 Non-cash compensation 8,507 4,748 Other (7,348) (12) Total Adjusted EBITDA $ 5,513 $ 13,630 Total Adjusted EBITDA by Segment: West $ 16,173 $ 15,699 East (3,203) 4,348 Cement 3,667 2,685 Corporate and other (11,124) (9,102) Total Adjusted EBITDA $ 5,513 $ 13,630 Three months ended March 31, April 1, 2018 2017 Purchases of property, plant and equipment West $ 28,909 $ 26,562 East 14,464 15,706 Cement 4,468 7,673 Total reportable segments 47,841 49,941 Corporate and other 1,664 1,115 Total purchases of property, plant and equipment $ 49,505 $ 51,056 Three months ended March 31, April 1, 2018 2017 Depreciation, depletion, amortization and accretion: West $ 22,151 $ 15,663 East 17,727 15,378 Cement 6,370 8,048 Total reportable segments 46,248 39,089 Corporate and other 710 659 Total depreciation, depletion, amortization and accretion $ 46,958 $ 39,748 March 31, December 30, 2018 2017 Total assets: West $ 1,313,661 $ 1,225,463 East 1,083,989 1,035,609 Cement 887,737 870,652 Total reportable segments 3,285,387 3,131,724 Corporate and other 178,153 372,517 Total $ 3,463,540 $ 3,504,241

Senior Notes' Guarantor and N33

Senior Notes' Guarantor and Non-Guarantor Financial Information (Tables) - Summit Materials, LLC	3 Months Ended
	Mar. 31, 2018
Condensed Consolidating Balance Sheets	Condensed Consolidating Balance Sheets March 31, 2018 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 169,192 $ 5,949 $ 12,841 $ (9,689) $ 178,293 Accounts receivable, net — 168,155 11,988 (44) 180,099 Intercompany receivables 560,676 427,497 — (988,173) — Cost and estimated earnings in excess of billings — 12,324 344 — 12,668 Inventories — 222,277 4,473 — 226,750 Other current assets 1,232 10,977 1,533 — 13,742 Total current assets 731,100 847,179 31,179 (997,906) 611,552 Property, plant and equipment, net 10,159 1,626,147 36,574 — 1,672,880 Goodwill — 1,050,976 59,472 — 1,110,448 Intangible assets, net — 16,621 — — 16,621 Other assets 2,958,528 159,408 1,322 (3,067,219) 52,039 Total assets $ 3,699,787 $ 3,700,331 $ 128,547 $ (4,065,125) $ 3,463,540 Liabilities and Member’s Interest Current liabilities: Current portion of debt $ 6,354 $ — $ — $ — $ 6,354 Current portion of acquisition-related liabilities — 34,601 — — 34,601 Accounts payable 4,769 100,108 6,821 (44) 111,654 Accrued expenses 44,605 75,989 1,655 (9,689) 112,560 Intercompany payables 591,792 393,342 3,039 (988,173) — Billings in excess of costs and estimated earnings — 14,736 395 — 15,131 Total current liabilities 647,520 618,776 11,910 (997,906) 280,300 Long-term debt 1,808,535 — — — 1,808,535 Acquisition-related liabilities — 25,285 — — 25,285 Other noncurrent liabilities 3,190 201,719 75,286 (171,317) 108,878 Total liabilities 2,459,245 845,780 87,196 (1,169,223) 2,222,998 Total member's interest 1,240,542 2,854,551 41,351 (2,895,902) 1,240,542 Total liabilities and member’s interest $ 3,699,787 $ 3,700,331 $ 128,547 $ (4,065,125) $ 3,463,540 Condensed Consolidating Balance Sheets December 30, 2017 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Assets Current assets: Cash and cash equivalents $ 370,741 $ 10,254 $ 14,933 $ (12,372) $ 383,556 Accounts receivable, net — 183,139 15,191 — 198,330 Intercompany receivables 573,301 484,747 — (1,058,048) — Cost and estimated earnings in excess of billings — 9,264 248 — 9,512 Inventories — 180,283 4,156 — 184,439 Other current assets 1,167 6,354 243 — 7,764 Total current assets 945,209 874,041 34,771 (1,070,420) 783,601 Property, plant and equipment, net 9,259 1,569,118 37,047 — 1,615,424 Goodwill — 976,206 61,114 — 1,037,320 Intangible assets, net — 16,833 — — 16,833 Other assets 2,890,674 162,711 1,271 (3,003,593) 51,063 Total assets $ 3,845,142 $ 3,598,909 $ 134,203 $ (4,074,013) $ 3,504,241 Liabilities and Member’s Interest Current liabilities: Current portion of debt $ 4,765 $ — $ — $ — $ 4,765 Current portion of acquisition-related liabilities — 11,587 — — 11,587 Accounts payable 3,976 89,912 6,749 — 100,637 Accrued expenses 47,047 79,372 2,227 (12,372) 116,274 Intercompany payables 684,057 369,918 4,073 (1,058,048) — Billings in excess of costs and estimated earnings — 15,349 401 — 15,750 Total current liabilities 739,845 566,138 13,450 (1,070,420) 249,013 Long-term debt 1,810,833 — — — 1,810,833 Acquisition-related liabilities — 52,239 — — 52,239 Other noncurrent liabilities 2,870 193,801 75,209 (171,318) 100,562 Total liabilities 2,553,548 812,178 88,659 (1,241,738) 2,212,647 Total member's interest 1,291,594 2,786,731 45,544 (2,832,275) 1,291,594 Total liabilities and member’s interest $ 3,845,142 $ 3,598,909 $ 134,203 $ (4,074,013) $ 3,504,241
Condensed Consolidating Statements of Operations and Comprehensive Loss	Condensed Consolidating Statements of Operations For the three months ended March 31, 2018 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Revenue $ — $ 300,658 $ 15,181 $ (1,418) $ 314,421 Cost of revenue (excluding items shown separately below) — 238,127 11,152 (1,418) 247,861 General and administrative expenses 20,947 47,177 3,003 — 71,127 Depreciation, depletion, amortization and accretion 710 44,993 1,255 — 46,958 Operating loss (21,657) (29,639) (229) — (51,525) Other income, net 17,365 (6,858) 51 (18,213) (7,655) Interest expense (income) 29,582 (2,203) 1,191 — 28,570 Loss from operations before taxes (68,604) (20,578) (1,471) 18,213 (72,440) Income tax expense (8) (3,454) (382) — (3,844) Net loss attributable to member of Summit Materials, LLC $ (68,596) $ (17,124) $ (1,089) $ 18,213 $ (68,596) Comprehensive (loss) income attributable to member of Summit Materials, LLC $ (70,705) $ (18,119) $ 2,015 $ 16,104 $ (70,705) Condensed Consolidating Statements of Operations For the three months ended April 1, 2017 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Revenue $ — 276,375 9,410 (1,508) $ 284,277 Cost of revenue (excluding items shown separately below) — 211,992 7,088 (1,508) 217,572 General and administrative expenses 15,050 43,373 1,318 — 59,741 Depreciation, depletion, amortization and accretion 658 38,439 651 — 39,748 Operating (loss) income (15,708) (17,429) 353 — (32,784) Other expense (income), net 15,410 235 (35) (16,077) (467) Interest expense 23,638 213 864 — 24,715 Loss from operations before taxes (54,756) (17,877) (476) 16,077 (57,032) Income (benefit) tax benefit — (2,180) 2 — (2,178) Net loss (54,756) (15,697) (478) 16,077 (54,854) Net loss attributable to noncontrolling interest — — — (98) (98) Net loss attributable to member of Summit Materials, LLC $ (54,756) $ (15,697) $ (478) $ 16,175 $ (54,756) Comprehensive loss attributable to member of Summit Materials, LLC $ (53,638) $ (16,109) $ (1,184) $ 17,293 $ (53,638)
Condensed Consolidating Statements of Cash Flows	Condensed Consolidating Statements of Cash Flows For the three months ended March 31, 2018 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Net cash (used in) provided by operating activities $ (38,210) $ (15,050) $ 1,893 $ — $ (51,367) Cash flow from investing activities: Acquisitions, net of cash acquired — (113,993) — — (113,993) Purchase of property, plant and equipment (1,664) (46,363) (1,478) — (49,505) Proceeds from the sale of property, plant, and equipment — 7,668 120 — 7,788 Other — 1,500 — — 1,500 Net cash used for investing activities (1,664) (151,188) (1,358) — (154,210) Cash flow from financing activities: Proceeds from investment by member (73,661) 89,136 — — 15,475 Loans received from and payments made on loans from other Summit Companies (83,090) 82,599 (2,192) 2,683 — Payments on long-term debt (1,588) (2,380) (4) — (3,972) Payments on acquisition-related liabilities — (6,462) — — (6,462) Distributions from partnership (2,509) — — — (2,509) Other (827) (960) (33) — (1,820) Net cash (used in) provided by financing activities (161,675) 161,933 (2,229) 2,683 712 Impact of cash on foreign currency — — (398) — (398) Net decrease in cash (201,549) (4,305) (2,092) 2,683 (205,263) Cash — Beginning of period 370,741 10,254 14,933 (12,372) 383,556 Cash — End of period $ 169,192 $ 5,949 $ 12,841 $ (9,689) $ 178,293 Condensed Consolidating Statements of Cash Flows For the three months ended April 1, 2017 100% Owned Non- Issuers Guarantors Guarantors Eliminations Consolidated Net cash (used in) provided by operating activities $ (42,891) $ (4,035) $ 1,850 $ — $ (45,076) Cash flow from investing activities: Acquisitions, net of cash acquired — (112,333) — — (112,333) Purchase of property, plant and equipment (1,115) (49,931) (10) — (51,056) Proceeds from the sale of property, plant, and equipment — 4,325 — — 4,325 Other — 974 — — 974 Net cash used for investing activities (1,115) (156,965) (10) — (158,090) Cash flow from financing activities: Proceeds from investment by member 164,795 73,834 — — 238,629 Capital issuance costs (638) — — — (638) Loans received from and payments made on loans from other Summit Companies (92,904) 101,616 (154) (8,558) — Payments on long-term debt (1,625) (1,941) — — (3,566) Payments on acquisition-related liabilities — (13,914) — — (13,914) Financing costs (699) — — — (699) Distributions from partnership (2,579) — — — (2,579) Other (319) (392) (21) — (732) Net cash provided by (used in) financing activities 66,031 159,203 (154) (8,558) 216,501 Impact of cash on foreign currency — — 100 — 100 Net increase (decrease) in cash 22,025 (1,797) 1,786 (8,558) 13,435 Cash — Beginning of period 133,862 4,820 14,656 (10,666) 142,672 Cash — End of period $ 155,887 $ 3,023 $ 16,442 $ (19,224) $ 156,107

Summary of Organization and S34

Summary of Organization and Significant Accounting Policies - General Information and Equity Offerings (Details)	1 Months Ended	3 Months Ended
	Oct. 31, 2017	Mar. 31, 2018segmentfacility
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements
Number of operating segments		3
Minority interest purchased (as a percent)	20.00%
Cement plant
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements
Number of plants | facility		2
Summit Materials, LLC
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements
Number of operating segments		3
Summit Materials, LLC | Ohio Valley Asphalt
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements
Minority interest purchased (as a percent)	20.00%
Summit Holdings LP
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements
Voting power (as a percent)		100.00%

Summary of Organization and S35

Summary of Organization and Significant Accounting Policies - Business and Credit Concentration (Details)	3 Months Ended
	Mar. 31, 2018stateitem
Business and Credit Concentrations
Number of states in which the entity operates | state	23
Sales | Customer Concentration Risk
Business and Credit Concentrations
Number of customers accounted for more than 10% of total revenue	0
Sales | Customer Concentration Risk | Maximum
Business and Credit Concentrations
Customer accounted revenue (as a percent)	10.00%
Summit Materials, LLC | Sales | Customer Concentration Risk
Business and Credit Concentrations
Number of customers accounted for more than 10% of total revenue	0
Summit Materials, LLC | Sales | Customer Concentration Risk | Maximum
Business and Credit Concentrations
Customer accounted revenue (as a percent)	10.00%
Tax Receivable Agreement | Summit Holdings LP
Business and Credit Concentrations
Percentage of benefits to be paid on tax receivable agreement	85.00%
Percentage of the tax receivable agreement allocated to additional paid-in capital	15.00%

Summary of Organization and S36

Summary of Organization and Significant Accounting Policies - Reclassifications (Details)	3 Months Ended
	Apr. 01, 2017USD ($)
Other assets
Reclassification amount	$ 17,000
Deferred tax assets, net
Reclassification amount	$ 2,400,000

Acquisitions - Completed Acquis

Acquisitions - Completed Acquisitions Information (Details) - item	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
West
Business Acquisition [Line Items]
Number of business acquisitions	2	6
East
Business Acquisition [Line Items]
Number of business acquisitions	2	8

Acquisitions - Summary of Asset

Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)facility	Apr. 01, 2017USD ($)	Dec. 30, 2017USD ($)
Business Acquisition [Line Items]
Net gain on asset disposals	$ 4,077	$ 1,665
Goodwill	$ 1,109,448		$ 1,036,320
Cement plant
Business Acquisition [Line Items]
Number of Plants Owned and Operated | facility	2
Cement
Business Acquisition [Line Items]
Goodwill	$ 204,656		204,656
Summit Materials, LLC
Business Acquisition [Line Items]
Net gain on asset disposals	4,077	$ 1,665
Goodwill	1,110,448		1,037,320
Summit Materials, LLC | Cement
Business Acquisition [Line Items]
Goodwill	204,656		204,656
2017 Acquisitions
Business Acquisition [Line Items]
Financial assets			31,615
Inventories			8,300
Property, plant and equipment			160,975
Intangible assets			161
Other assets			4,200
Financial liabilities			(15,501)
Other long-term liabilities			(17,610)
Net assets acquired			172,140
Goodwill			247,536
Purchase price			419,676
Acquisition related liabilities			(43,452)
Other			(1,294)
Net cash paid for acquisitions			374,930
2017 Acquisitions | Summit Materials, LLC
Business Acquisition [Line Items]
Financial assets			31,615
Inventories			8,300
Property, plant and equipment			160,975
Intangible assets			161
Other assets			4,200
Financial liabilities			(15,501)
Other long-term liabilities			(17,610)
Net assets acquired			172,140
Goodwill			247,536
Purchase price			419,676
Acquisition related liabilities			(43,452)
Other			(1,294)
Net cash paid for acquisitions			$ 374,930
2018 Acquisitions
Business Acquisition [Line Items]
Financial assets	10,372
Inventories	7,233
Property, plant and equipment	41,458
Intangible assets	108
Other assets	2,979
Financial liabilities	(9,307)
Other long-term liabilities	(3,597)
Net assets acquired	49,246
Goodwill	73,274
Purchase price	122,520
Acquisition related liabilities	(8,527)
Net cash paid for acquisitions	113,993
2018 Acquisitions | Summit Materials, LLC
Business Acquisition [Line Items]
Financial assets	10,372
Inventories	7,233
Property, plant and equipment	41,458
Intangible assets	108
Other assets	2,979
Financial liabilities	(9,307)
Other long-term liabilities	(3,597)
Net assets acquired	49,246
Goodwill	73,274
Purchase price	122,520
Acquisition related liabilities	(8,527)
Net cash paid for acquisitions	$ 113,993

Acquisitions - Summary of Goodw

Acquisitions - Summary of Goodwill by Reportable Segments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 1,036,320
Acquisitions	74,770
Foreign currency translation adjustments	(1,642)
Ending balance	1,109,448
Summit Materials, LLC
Goodwill [Roll Forward]
Beginning balance	1,037,320
Acquisitions	74,770
Foreign currency translation adjustments	1,642
Ending balance	1,110,448
West
Goodwill [Roll Forward]
Beginning balance	526,290
Acquisitions	43,810
Foreign currency translation adjustments	(1,642)
Ending balance	568,458
West | Summit Materials, LLC
Goodwill [Roll Forward]
Beginning balance	527,290
Acquisitions	43,810
Foreign currency translation adjustments	1,642
Ending balance	569,458
East
Goodwill [Roll Forward]
Beginning balance	305,374
Acquisitions	30,960
Ending balance	336,334
East | Summit Materials, LLC
Goodwill [Roll Forward]
Beginning balance	305,374
Acquisitions	30,960
Ending balance	336,334
Cement
Goodwill [Roll Forward]
Beginning balance	204,656
Ending balance	204,656
Cement | Summit Materials, LLC
Goodwill [Roll Forward]
Beginning balance	204,656
Ending balance	$ 204,656

Acquisitions - Intangible Asset

Acquisitions - Intangible Assets By Type (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 23,641	$ 23,531
Accumulated Amortization	(7,020)	(6,698)
Net Carrying Amount	16,621	16,833
Summit Materials, LLC
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,641	23,531
Accumulated Amortization	(7,020)	(6,698)
Net Carrying Amount	16,621	16,833
Leases
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,998	15,888
Accumulated Amortization	(4,381)	(4,178)
Net Carrying Amount	11,617	11,710
Leases | Summit Materials, LLC
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,998	15,888
Accumulated Amortization	(4,381)	(4,178)
Net Carrying Amount	11,617	11,710
Reserve Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,234	6,234
Accumulated Amortization	(1,699)	(1,625)
Net Carrying Amount	4,535	4,609
Reserve Rights | Summit Materials, LLC
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,234	6,234
Accumulated Amortization	(1,699)	(1,625)
Net Carrying Amount	4,535	4,609
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,000	1,000
Accumulated Amortization	(783)	(758)
Net Carrying Amount	217	242
Trade Names | Summit Materials, LLC
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,000	1,000
Accumulated Amortization	(783)	(758)
Net Carrying Amount	217	242
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	409	409
Accumulated Amortization	(157)	(137)
Net Carrying Amount	252	272
Other | Summit Materials, LLC
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	409	409
Accumulated Amortization	(157)	(137)
Net Carrying Amount	$ 252	$ 272

Acquisitions - Amortization Exp

Acquisitions - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Estimated amortization expense
2018 (nine months)	$ 938
2,019	1,275
2,020	1,162
2,021	1,120
2,022	1,120
2,023	1,120
Thereafter	9,886
Total	16,621		$ 16,833
Amortization expense	300	$ 300
Summit Materials, LLC
Estimated amortization expense
2018 (nine months)	938
2,019	1,275
2,020	1,162
2,021	1,120
2,022	1,120
2,023	1,120
Thereafter	9,886
Total	16,621		$ 16,833
Amortization expense	$ 300

Revenue Recognition - By Produc

Revenue Recognition - By Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Revenue by product
Total revenue	$ 314,421	$ 284,277
Aggregates
Revenue by product
Total revenue	67,450	61,622
Cement
Revenue by product
Total revenue	33,117	39,435
Ready-mixed concrete
Revenue by product
Total revenue	122,015	93,177
Asphalt
Revenue by product
Total revenue	18,141	19,537
Paving and related services
Revenue by product
Total revenue	34,336	36,296
Other
Revenue by product
Total revenue	39,362	34,210
Summit Materials, LLC
Revenue by product
Total revenue	314,421	284,277
Summit Materials, LLC | Aggregates
Revenue by product
Total revenue	67,450	61,622
Summit Materials, LLC | Cement
Revenue by product
Total revenue	33,117	39,435
Summit Materials, LLC | Ready-mixed concrete
Revenue by product
Total revenue	122,015	93,177
Summit Materials, LLC | Asphalt
Revenue by product
Total revenue	18,141	19,537
Summit Materials, LLC | Paving and related services
Revenue by product
Total revenue	34,336	36,296
Summit Materials, LLC | Other
Revenue by product
Total revenue	$ 39,362	$ 34,210

Revenue Recognition - Contract

Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
Change in Contract with Customer, Asset
Costs and estimated earnings in excess of billings	$ 12,668	$ 9,512
Changes in revenue billed, contract price or cost estimates	2,678
Acquisitions	483
Other	(5)
Change in Contract with Customer, Liability
Billings in excess of costs and estimated earnings	15,131	15,750
Changes in revenue billed, contract price or cost estimates	(1,788)
Acquisitions	1,179
Other	(10)
Summit Materials, LLC
Change in Contract with Customer, Asset
Costs and estimated earnings in excess of billings	12,668	9,512
Changes in revenue billed, contract price or cost estimates	2,678
Acquisitions	483
Other	(5)
Change in Contract with Customer, Liability
Billings in excess of costs and estimated earnings	15,131	$ 15,750
Changes in revenue billed, contract price or cost estimates	(1,788)
Acquisitions	1,179
Other	$ (10)

Revenue Recognition - Summary o

Revenue Recognition - Summary of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 153,563	$ 137,696
Construction contract receivables	19,304	49,832
Retention receivables	12,378	14,973
Receivables from related parties	320	468
Accounts receivable	185,565	202,969
Less: Allowance for doubtful accounts	(5,466)	(4,639)
Accounts receivable, net	$ 180,099	198,330
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
General collection and billing period for retention receivables	1 year
Summit Materials, LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 153,563	137,696
Construction contract receivables	19,304	49,832
Retention receivables	12,378	14,973
Receivables from related parties	320	468
Accounts receivable	185,565	202,969
Less: Allowance for doubtful accounts	(5,466)	(4,639)
Accounts receivable, net	$ 180,099	$ 198,330

Inventories - Components of Inv

Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Inventories
Aggregate stockpiles	$ 142,817	$ 126,791
Finished goods	54,258	34,667
Work in process	8,845	7,729
Raw materials	20,830	15,252
Total	226,750	184,439
Summit Materials, LLC
Inventories
Aggregate stockpiles	142,817	126,791
Finished goods	54,258	34,667
Work in process	8,845	7,729
Raw materials	20,830	15,252
Total	$ 226,750	$ 184,439

Accrued Expenses - Components o

Accrued Expenses - Components of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Schedule Of Accrued Expenses [Line Items]
Interest	$ 23,547	$ 24,095
Payroll and benefits	22,278	33,915
Capital lease obligations	22,733	19,276
Insurance	11,423	11,455
Non-income taxes	9,553	7,236
Professional fees	2,785	1,717
Other	20,010	18,935
Total	112,329	116,629
Summit Materials, LLC
Schedule Of Accrued Expenses [Line Items]
Interest	23,547	24,095
Payroll and benefits	22,278	33,915
Capital lease obligations	22,733	19,276
Insurance	11,423	11,455
Non-income taxes	9,784	7,467
Professional fees	2,785	1,717
Other	20,010	18,349
Total	$ 112,560	$ 116,274

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017	Jan. 19, 2017
Debt
Total debt	$ 1,830,985	$ 1,832,455
Current portion of long-term debt	6,354	4,765
Long-term debt	1,824,631	1,827,690
Gross amount	1,833,788
Debt discount	2,803
Summit Materials, LLC
Debt
Total debt	1,830,985	1,832,455
Current portion of long-term debt	6,354	4,765
Long-term debt	1,824,631	1,827,690
Gross amount	1,833,788
Debt discount	2,803
Term Loan, due 2022
Debt
Total debt	632,275	633,805
Gross amount	633,800	635,400	$ 640,300
Debt discount	1,500	1,600
Term Loan, due 2022 | Summit Materials, LLC
Debt
Total debt	632,275	633,805
Gross amount	633,800	635,400
Debt discount	1,500	1,600
8 1/2% Senior Notes, due 2022
Debt
Total debt	$ 250,000	250,000
Debt instrument interest rate (as a percent)	8.50%
8 1/2% Senior Notes, due 2022 | Summit Materials, LLC
Debt
Total debt	$ 250,000	250,000
Debt instrument interest rate (as a percent)	8.50%
6 1/8% Senior Notes, due 2023
Debt
Total debt	$ 648,710	648,650
Gross amount	650,000
Debt discount	$ 1,300	1,400
Debt instrument interest rate (as a percent)	6.125%
6 1/8% Senior Notes, due 2023 | Summit Materials, LLC
Debt
Total debt	$ 648,710	648,650
Gross amount	650,000	650,000
Debt discount	$ 1,300	1,400
Debt instrument interest rate (as a percent)	6.125%
5 1/8% Senior Notes, due 2025
Debt
Total debt	$ 300,000	300,000
Debt instrument interest rate (as a percent)	5.125%
5 1/8% Senior Notes, due 2025 | Summit Materials, LLC
Debt
Long-term debt	$ 300,000	$ 300,000
Debt instrument interest rate (as a percent)	5.125%

Debt - Schedule of Contractual

Debt - Schedule of Contractual Payments of Long-Term Debt (Details) $ in Thousands	Mar. 31, 2018USD ($)
Contractual payments of long-term debt
2018 (nine months)	$ 3,177
2,019	6,354
2,020	7,942
2,021	6,354
2,022	256,354
2,023	656,354
Thereafter	897,253
Total	1,833,788
Less: Original issue net discount	(2,803)
Less: Capitalized loan costs	(16,096)
Total debt	1,814,889
Summit Materials, LLC
Contractual payments of long-term debt
2018 (nine months)	3,177
2,019	6,354
2,020	7,942
2,021	6,354
2,022	256,354
2,023	656,354
Thereafter	897,253
Total	1,833,788
Less: Original issue net discount	(2,803)
Less: Capitalized loan costs	(16,096)
Total debt	$ 1,814,889

Debt - Senior Notes - Additiona

Debt - Senior Notes - Additional Information (Details) - USD ($) $ in Thousands	Jun. 01, 2017	Mar. 08, 2016	Apr. 01, 2017	Jan. 02, 2016	Mar. 31, 2018
Debt
Write off of deferred financing fees			$ 45
8 1/2% Senior Notes, due 2022
Debt
Senior notes, interest rate (as a percent)					8.50%
6 1/8% Senior Notes, due 2023
Debt
Senior notes, interest rate (as a percent)					6.125%
5 1/8% Senior Notes, due 2025
Debt
Senior notes, interest rate (as a percent)					5.125%
Issuers
Debt
Debt instrument, face amount	$ 300,000
Percentage of par value of senior notes	100.00%
Proceeds net of related fees and expenses	$ 295,400
Issuers | 8 1/2% Senior Notes, due 2022
Debt
Debt instrument, face amount		$ 250,000
Senior notes, interest rate (as a percent)		8.50%
Percentage of par value of senior notes		100.00%
Proceeds net of related fees and expenses		$ 246,300
Issuers | 6 1/8% Senior Notes, due 2023
Debt
Debt instrument, face amount				$ 650,000
Senior notes, interest rate (as a percent)				6.125%
Issuers | 6 1/8% Senior Notes, due 2023, issued at par
Debt
Debt instrument, face amount				$ 350,000
Issuers | 6 1/8% Senior Notes, due 2023, , issued at 99.375% of par
Debt
Debt instrument, face amount				$ 300,000
Percentage of par value of senior notes				99.375%
Summit Materials, LLC
Debt
Write off of deferred financing fees			$ 45
Summit Materials, LLC | 8 1/2% Senior Notes, due 2022
Debt
Senior notes, interest rate (as a percent)					8.50%
Summit Materials, LLC | 6 1/8% Senior Notes, due 2023
Debt
Senior notes, interest rate (as a percent)					6.125%
Summit Materials, LLC | 5 1/8% Senior Notes, due 2025
Debt
Senior notes, interest rate (as a percent)					5.125%

Debt - Senior Secured Credit Fa

Debt - Senior Secured Credit Facilities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017	Jan. 19, 2017
Debt
Outstanding principal amount	$ 1,833,788
Financing fees recognized	1,013	$ 917
Term Loan, due 2022
Debt
Outstanding principal amount	633,800		$ 635,400	$ 640,300
Summit Materials, LLC
Debt
Outstanding principal amount	1,833,788
Financing fees recognized	$ 1,013	$ 917
Summit Materials, LLC | Senior Secured Credit Facilities
Debt
First lien leverage ratio	4.75
Summit Materials, LLC | Term Loan, due 2022
Debt
Debt instrument, face amount	$ 650,000
Outstanding principal amount	$ 633,800		635,400
Quarterly principal repayments percentage	0.25%
Summit Materials, LLC | Revolving Credit Facility
Debt
Maximum borrowing capacity	$ 235,000
Amount outstanding	0		$ 0
Remaining borrowing capacity	$ 219,600
Summit Materials, LLC | Revolving Credit Facility | LIBOR
Debt
Basis spread on variable rate	3.00%
Summit Materials, LLC | Revolving Credit Facility | LIBOR Plus 1%
Debt
Basis spread on variable rate	2.25%
Percentage added to base rate	1.00%
Summit Materials, LLC | Revolving Credit Facility | Federal funds rate
Debt
Basis spread on variable rate	0.50%
Summit Materials, LLC | Letter of Credit
Debt
Amount outstanding	$ 15,400

Debt - Summary of Activity for

Debt - Summary of Activity for Deferred Financing Fees (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Deferred finance costs
Beginning balance	$ 19,033	$ 18,290
Loan origination fees		699
Amortization	(1,013)	(917)
Write off of deferred financing fees		(45)
Ending balance	18,020	18,027
Summit Materials, LLC
Deferred finance costs
Beginning balance	19,033	18,290
Loan origination fees		699
Amortization	(1,013)	(917)
Write off of deferred financing fees		(45)
Ending balance	$ 18,020	$ 18,027

Debt - Other - Additional Infor

Debt - Other - Additional Information (Details) - CAD ($) $ in Millions	Jan. 15, 2015	Mar. 31, 2018	Dec. 30, 2017
Canadian subsidiary credit agreement
Debt
Amount outstanding		$ 0	$ 0
Canadian subsidiary credit agreement | Summit Materials, LLC
Debt
Amount outstanding		$ 0
Canadian subsidiary credit agreement, Operating activities
Debt
Revolving credit commitment	$ 6
Canadian subsidiary credit agreement, Operating activities | Summit Materials, LLC
Debt
Revolving credit commitment	6
Canadian subsidiary credit agreement, Capital equipment
Debt
Revolving credit commitment	$ 0.5
Basis spread on variable rate	0.90%
Canadian subsidiary credit agreement, Capital equipment | Summit Materials, LLC
Debt
Revolving credit commitment	$ 0.5
Basis spread on variable rate	0.90%
Canadian subsidiary credit agreement, Guarantees
Debt
Revolving credit commitment	$ 0.4
Canadian subsidiary credit agreement, Guarantees | Summit Materials, LLC
Debt
Revolving credit commitment	$ 0.4
Prime rate | Canadian subsidiary credit agreement, Operating activities
Debt
Basis spread on variable rate	0.20%
Prime rate | Canadian subsidiary credit agreement, Operating activities | Summit Materials, LLC
Debt
Basis spread on variable rate	0.20%

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Tax Receivable Agreement (Details) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Income Taxes
Income tax expense (benefit)	$ (16,706,000)		$ (2,178,000)	$ (2,200,000)
Tax receivable agreement liability	$ 332,162,000	$ 332,162,000		331,340,000
Number of Summit LP units purchased by Company, newly issued units (in shares)	104,104
Deferred tax asset, Investment in limited partnership	$ 1,000,000	1,000,000
Valuation Allowance
Valuation allowance	1,675,000	1,675,000		1,675,000
Liabilities recognized for uncertain tax positions	0	0		0
Income tax provision, interest or penalties recognized		0	0
Tax Receivable Agreement
Income Taxes
Tax receivable agreement liability	332,200,000	$ 332,200,000		331,900,000
Tax Receivable Agreement | Accrued expenses.
Income Taxes
Tax receivable agreement liability				$ 600,000
Summit Materials, LLC
Income Taxes
Income tax expense (benefit)	(3,844,000)		(2,178,000)
Summit Holdings LP
Income Taxes
Distributions to LP Unitholders	$ 9,000		$ 79,000
Summit Holdings LP | Tax Receivable Agreement
Income Taxes
Percentage of benefits to be paid on tax receivable agreement	85.00%

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Basic to Diluted Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Reconciliation of basic to diluted loss per share
Net income (loss) attributable to Summit Inc.	$ (53,729)	$ (52,444)
Number of Summit LP units purchased by Company, newly issued units (in shares)	104,104
LP Units
Reconciliation of basic to diluted loss per share
Anti dilutive shares excluded from calculation of earnings per share	3,585,516	4,915,202
Time Vesting Restricted Stock Units
Reconciliation of basic to diluted loss per share
Anti dilutive shares excluded from calculation of earnings per share	854,482	527,393
Market Based Restricted Stock Units
Reconciliation of basic to diluted loss per share
Anti dilutive shares excluded from calculation of earnings per share	295,252	211,455
Stock options
Reconciliation of basic to diluted loss per share
Anti dilutive shares excluded from calculation of earnings per share	3,296,133	5,311,863
Warrants
Reconciliation of basic to diluted loss per share
Add: warrants	100,037	160,333
Common Class A
Reconciliation of basic to diluted loss per share
Weighted average shares of Class A common stock outstanding	110,659,098	106,692,717
Basic income (loss) per share	$ (0.49)	$ (0.49)
Weighted average dilutive shares outstanding	110,659,098	106,692,717
Diluted earnings per share	$ (0.49)	$ (0.49)
Summit Materials, LLC
Reconciliation of basic to diluted loss per share
Net income (loss) attributable to Summit Inc.	$ (68,596)	$ (54,756)

Stockholders' Equity - Equity O

Stockholders' Equity - Equity Offerings (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 10, 2017	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017	Dec. 31, 2016
Equity Offering
Proceeds from sale of common stock, net of underwriting discounts			$ 237,600
Ownership Percentage		96.90%	95.60%	96.80%	95.00%
Summit Holdings LP
Equity Offering
Noncontrolling interest elimination (as a percent)		3.10%		3.20%
Common Class A
Equity Offering
Beginning Balance (in shares)		110,350,594	97,554,278
Exchanges during period (in shares)		104,104	236,095
Other (in shares)		1,033,875	134,423
Ending Balance (in shares)		111,488,573	107,924,796
Common Class A | Follow on Public Offering
Equity Offering
Common stock issued (in shares)			10,000,000
Issuance of Shares (in shares)			10,000,000
Summit Materials, Inc. and Summit Holdings, LP
Equity Offering
Beginning Balance (in shares)		114,040,214	102,705,575
Other (in shares)		1,033,875	134,423
Ending Balance (in shares)		115,074,089	112,839,998
Summit Materials, Inc. and Summit Holdings, LP | Follow on Public Offering
Equity Offering
Common stock issued (in shares)			10,000,000
Issuance of Shares (in shares)			10,000,000
Summit Materials, Inc. and Summit Holdings, LP | Common Class A | Follow on Public Offering
Equity Offering
Proceeds from sale of common stock, net of underwriting discounts	$ 237,600
Common stock issued (in shares)	10,000,000
Offering price (in dollars per share)	$ 24.05
Issuance of Shares (in shares)	10,000,000
Summit Holdings LP
Equity Offering
Voting power (as a percent)		100.00%
LP Units | Summit Holdings LP
Equity Offering
Number of LP Units outstanding		3,585,516	4,915,202	3,689,620	5,151,297
Number of LP Units exchanged		(104,104)	(236,095)

Stockholders' Equity - Accumula

Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Changes in each component of accumulated other comprehensive loss
Beginning balance	$ 1,258,543
Ending balance	1,224,949
Accumulated Other Comprehensive Operations
Changes in each component of accumulated other comprehensive loss
Beginning balance	7,386	$ (2,249)
Foreign currency translation adjustment	(3,772)	670
Income on cash flow hedges	1,209	393
Ending balance	4,823	(1,186)
Change in retirement plans
Changes in each component of accumulated other comprehensive loss
Beginning balance	2,364	1,450
Ending balance	2,364	1,450
Foreign currency translation adjustment
Changes in each component of accumulated other comprehensive loss
Beginning balance	4,637	(3,106)
Foreign currency translation adjustment	(3,772)	670
Ending balance	865	(2,436)
Cash flow hedge adjustments
Changes in each component of accumulated other comprehensive loss
Beginning balance	385	(593)
Income on cash flow hedges	1,209	393
Ending balance	1,594	(200)
Summit Materials, LLC | Accumulated Other Comprehensive Operations
Changes in each component of accumulated other comprehensive loss
Beginning balance	(17,135)	(27,444)
Foreign currency translation adjustment	(3,104)	706
Income on cash flow hedges	995	412
Ending balance	(19,244)	(26,326)
Summit Materials, LLC | Change in retirement plans
Changes in each component of accumulated other comprehensive loss
Beginning balance	(6,053)	(7,181)
Ending balance	(6,053)	(7,181)
Summit Materials, LLC | Foreign currency translation adjustment
Changes in each component of accumulated other comprehensive loss
Beginning balance	(10,022)	(17,790)
Foreign currency translation adjustment	(3,104)	706
Ending balance	(13,126)	(17,084)
Summit Materials, LLC | Cash flow hedge adjustments
Changes in each component of accumulated other comprehensive loss
Beginning balance	(1,060)	(2,473)
Income on cash flow hedges	995	412
Ending balance	$ (65)	$ (2,061)

Supplemental Cash Flow Inform57

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash payments:
Interest	$ 26,927	$ 26,727
Income taxes	1,582	230
Non cash financing activities:
Exchange of LP units to Common A Stock	3,325	5,753
Summit Materials, LLC
Cash payments:
Interest	26,927	26,727
Income taxes	$ 1,582	$ 230

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
Contingencies
Term of purchase commitments	1 year
Site Restoration Obligations
Contingencies
Anticipated costs	$ 71.7	$ 67.9
Site Restoration Obligations | Other noncurrent liabilities
Contingencies
Site restoration obligation, non-current	20.5	20.5
Site Restoration Obligations | Accrued expenses.
Contingencies
Asset retirement obligation, current	$ 4	3.9
Summit Materials, LLC
Contingencies
Term of purchase commitments	1 year
Summit Materials, LLC | Site Restoration Obligations
Contingencies
Anticipated costs	$ 71.7	67.9
Summit Materials, LLC | Site Restoration Obligations | Other noncurrent liabilities
Contingencies
Site restoration obligation, non-current	20.5	20.5
Summit Materials, LLC | Site Restoration Obligations | Accrued expenses.
Contingencies
Asset retirement obligation, current	$ 4	$ 3.9

Fair Value - Fair Value Measure

Fair Value - Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Level 3
Fair Value Measurements
Current portion of acquisition-related liabilities and Accrued expenses - Contingent consideration	$ 23,474	$ 23,474		$ 594
Acquisition-related liabilities and Other noncurrent liabilities - Contingent consideration	4,025	$ 4,025		34,301
Discount rate		11.00%
Adjustment to contingent consideration	0		$ 0
Cash flow hedges | Interest rate derivatives | Level 2
Fair Value Measurements
Current portion of acquisition-related liabilities and Accrued expenses - Cash flow hedge	123	$ 123		488
Acquisition-related liabilities and Other noncurrent liabilities - Cash flow hedge				492
Cash flow hedges | Interest rate derivatives | Term Loan, due 2022
Fair Value Measurements
Term loan borrowings hedged by derivatives	200,000	200,000
Summit Materials, LLC | Level 3
Fair Value Measurements
Current portion of acquisition-related liabilities and Accrued expenses - Contingent consideration	23,474	23,474		594
Acquisition-related liabilities and Other noncurrent liabilities - Contingent consideration	4,025	$ 4,025		34,301
Discount rate		11.00%
Summit Materials, LLC | Cash flow hedges | Interest rate derivatives | Level 2
Fair Value Measurements
Current portion of acquisition-related liabilities and Accrued expenses - Cash flow hedge	123	$ 123		488
Acquisition-related liabilities and Other noncurrent liabilities - Cash flow hedge				$ 492
Summit Materials, LLC | Cash flow hedges | Interest rate derivatives | Term Loan, due 2022
Fair Value Measurements
Term loan borrowings hedged by derivatives	$ 200,000	$ 200,000

Fair Value - Carrying Value and

Fair Value - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017
Financial Instruments
Current portion of debt	$ 6,354	$ 4,765
Summit Materials, LLC
Financial Instruments
Current portion of debt	6,354	4,765
Level 2
Financial Instruments
Current portion of debt	6,400	4,800
Level 2 | Fair Value.
Financial Instruments
Long-term debt	1,860,811	1,893,239
Level 2 | Carrying Value
Financial Instruments
Long-term debt	1,830,985	1,832,455
Level 2 | Summit Materials, LLC
Financial Instruments
Current portion of debt	6,400	4,800
Level 2 | Summit Materials, LLC | Fair Value.
Financial Instruments
Long-term debt	1,860,811	1,893,239
Level 2 | Summit Materials, LLC | Carrying Value
Financial Instruments
Long-term debt	1,830,985	1,832,455
Level 3 | Fair Value.
Financial Instruments
Current portion of deferred consideration and noncompete obligations	13,627	13,493
Long term portion of deferred consideration and noncompete obligations	24,869	23,834
Level 3 | Carrying Value
Financial Instruments
Current portion of deferred consideration and noncompete obligations	13,627	13,493
Long term portion of deferred consideration and noncompete obligations	24,869	23,834
Level 3 | Summit Materials, LLC | Fair Value.
Financial Instruments
Current portion of deferred consideration and noncompete obligations	11,127	10,993
Long term portion of deferred consideration and noncompete obligations	21,260	17,938
Level 3 | Summit Materials, LLC | Carrying Value
Financial Instruments
Current portion of deferred consideration and noncompete obligations	11,127	10,993
Long term portion of deferred consideration and noncompete obligations	$ 21,260	$ 17,938

Segment Information - Financial

Segment Information - Financial Data (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)segment	Apr. 01, 2017USD ($)	Dec. 30, 2017USD ($)
Segment Information
Number of operating segments | segment	3
Total revenue	$ 314,421	$ 284,277
(Loss) income from operations before taxes	(72,654)	(57,286)
Interest expense	28,784	24,969
Depreciation, depletion and amortization	46,543	39,304
Accretion	415	444
Loss on debt financings		190
Transaction costs	1,266	1,273
Non-cash compensation	8,507	4,748
Other	(7,348)	(12)
Total Adjusted EBITDA	5,513	13,630
Total capital expenditures	49,505	51,056
Total depreciation, depletion, amortization and accretion	46,958	39,748
Total assets	$ 3,756,580		$ 3,787,333
Summit Materials, LLC
Segment Information
Number of operating segments | segment	3
Total revenue	$ 314,421	284,277
(Loss) income from operations before taxes	(72,440)	(57,032)
Interest expense	28,570	24,715
Depreciation, depletion and amortization	46,543	39,304
Accretion	415	444
Loss on debt financings		190
Transaction costs	1,266	1,273
Non-cash compensation	8,507	4,748
Other	(7,348)	(12)
Total Adjusted EBITDA	5,513	13,630
Total capital expenditures	49,505	51,056
Total depreciation, depletion, amortization and accretion	46,958	39,748
Total assets	3,463,540		3,504,241
West
Segment Information
Total revenue	181,713	143,219
West | Summit Materials, LLC
Segment Information
Total revenue	181,713	143,219
East
Segment Information
Total revenue	95,157	97,223
East | Summit Materials, LLC
Segment Information
Total revenue	95,157	97,223
Cement
Segment Information
Total revenue	37,551	43,835
Cement | Summit Materials, LLC
Segment Information
Total revenue	37,551	43,835
Operating segment
Segment Information
Total capital expenditures	47,841	49,941
Total depreciation, depletion, amortization and accretion	46,248	39,089
Total assets	3,285,387		3,131,724
Operating segment | Summit Materials, LLC
Segment Information
Total capital expenditures	47,841	49,941
Total depreciation, depletion, amortization and accretion	46,248	39,089
Total assets	3,285,387		3,131,724
Operating segment | West
Segment Information
Total Adjusted EBITDA	16,173	15,699
Total capital expenditures	28,909	26,562
Total depreciation, depletion, amortization and accretion	22,151	15,663
Total assets	1,313,661		1,225,463
Operating segment | West | Summit Materials, LLC
Segment Information
Total Adjusted EBITDA	16,173	15,699
Total capital expenditures	28,909	26,562
Total depreciation, depletion, amortization and accretion	22,151	15,663
Total assets	1,313,661		1,225,463
Operating segment | East
Segment Information
Total Adjusted EBITDA	(3,203)	4,348
Total capital expenditures	14,464	15,706
Total depreciation, depletion, amortization and accretion	17,727	15,378
Total assets	1,083,989		1,035,609
Operating segment | East | Summit Materials, LLC
Segment Information
Total Adjusted EBITDA	(3,203)	4,348
Total capital expenditures	14,464	15,706
Total depreciation, depletion, amortization and accretion	17,727	15,378
Total assets	1,083,989		1,035,609
Operating segment | Cement
Segment Information
Total Adjusted EBITDA	3,667	2,685
Total capital expenditures	4,468	7,673
Total depreciation, depletion, amortization and accretion	6,370	8,048
Total assets	887,737		870,652
Operating segment | Cement | Summit Materials, LLC
Segment Information
Total Adjusted EBITDA	3,667	2,685
Total capital expenditures	4,468	7,673
Total depreciation, depletion, amortization and accretion	6,370	8,048
Total assets	887,737		870,652
Corporate and other
Segment Information
Total Adjusted EBITDA	(11,124)	(9,102)
Total capital expenditures	1,664	1,115
Total depreciation, depletion, amortization and accretion	710	659
Total assets	471,193		655,609
Corporate and other | Summit Materials, LLC
Segment Information
Total Adjusted EBITDA	(11,124)	(9,102)
Total capital expenditures	1,664	1,115
Total depreciation, depletion, amortization and accretion	710	659
Total assets	178,153		$ 372,517
Aggregates
Segment Information
Total revenue	67,450	61,622
Aggregates | Summit Materials, LLC
Segment Information
Total revenue	67,450	61,622
Cement
Segment Information
Total revenue	33,117	39,435
Cement | Summit Materials, LLC
Segment Information
Total revenue	33,117	39,435
Ready-mixed concrete
Segment Information
Total revenue	122,015	93,177
Ready-mixed concrete | Summit Materials, LLC
Segment Information
Total revenue	122,015	93,177
Asphalt
Segment Information
Total revenue	18,141	19,537
Asphalt | Summit Materials, LLC
Segment Information
Total revenue	18,141	19,537
Paving and related services
Segment Information
Total revenue	34,336	36,296
Paving and related services | Summit Materials, LLC
Segment Information
Total revenue	34,336	36,296
Other
Segment Information
Total revenue	39,362	34,210
Other | Summit Materials, LLC
Segment Information
Total revenue	$ 39,362	$ 34,210

Guarantor and Non-Guarantor Fin

Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017	Apr. 01, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 178,293	$ 383,556	$ 156,107	$ 143,392
Accounts receivable, net	180,099	198,330
Cost and estimated earnings in excess of billings	12,668	9,512
Inventories	226,750	184,439
Other current assets	13,742	7,764
Total current assets	611,552	783,601
Property, plant and equipment, net	1,672,880	1,615,424
Goodwill	1,109,448	1,036,320
Intangible assets	16,621	16,833
Other assets	48,350	51,063
Total assets	3,756,580	3,787,333
Current liabilities:
Current portion of debt	6,354	4,765
Current portion of acquisition-related liabilities	37,101	14,087
Accounts payable	110,348	98,744
Accrued expenses	112,329	116,629
Billings in excess of costs and estimated earnings	15,131	15,750
Total current liabilities	281,263	249,975
Long-term debt	1,808,535	1,810,833
Acquisition-related liabilities	28,894	58,135
Other noncurrent liabilities	70,379	65,329
Total liabilities	2,521,233	2,515,612
Total liabilities and stockholders' equity / member's interest	3,756,580	3,787,333
Summit Materials, LLC
Current assets:
Cash and cash equivalents	178,293	383,556	156,107	142,672
Accounts receivable, net	180,099	198,330
Cost and estimated earnings in excess of billings	12,668	9,512
Inventories	226,750	184,439
Other current assets	13,742	7,764
Total current assets	611,552	783,601
Property, plant and equipment, net	1,672,880	1,615,424
Goodwill	1,110,448	1,037,320
Intangible assets	16,621	16,833
Other assets	52,039	51,063
Total assets	3,463,540	3,504,241
Current liabilities:
Current portion of debt	6,354	4,765
Current portion of acquisition-related liabilities	34,601	11,587
Accounts payable	111,654	100,637
Accrued expenses	112,560	116,274
Billings in excess of costs and estimated earnings	15,131	15,750
Total current liabilities	280,300	249,013
Long-term debt	1,808,535	1,810,833
Acquisition-related liabilities	25,285	52,239
Other noncurrent liabilities	108,878	100,562
Total liabilities	2,222,998	2,212,647
Total member's interest	1,240,542	1,291,594
Total liabilities and stockholders' equity / member's interest	3,463,540	3,504,241
Summit Materials, LLC | Eliminations
Current assets:
Cash and cash equivalents	(9,689)	(12,372)	(19,224)	(10,666)
Accounts receivable, net	(44)
Intercompany receivables	(988,173)	(1,058,048)
Total current assets	(997,906)	(1,070,420)
Other assets	(3,067,219)	(3,003,593)
Total assets	(4,065,125)	(4,074,013)
Current liabilities:
Accounts payable	(44)
Accrued expenses	(9,689)	(12,372)
Intercompany payables	(988,173)	(1,058,048)
Total current liabilities	(997,906)	(1,070,420)
Other noncurrent liabilities	(171,317)	(171,318)
Total liabilities	(1,169,223)	(1,241,738)
Total member's interest	(2,895,902)	(2,832,275)
Total liabilities and stockholders' equity / member's interest	(4,065,125)	(4,074,013)
Summit Materials, LLC | Issuers
Current assets:
Cash and cash equivalents	169,192	370,741	155,887	133,862
Intercompany receivables	560,676	573,301
Other current assets	1,232	1,167
Total current assets	731,100	945,209
Property, plant and equipment, net	10,159	9,259
Other assets	2,958,528	2,890,674
Total assets	3,699,787	3,845,142
Current liabilities:
Current portion of debt	6,354	4,765
Accounts payable	4,769	3,976
Accrued expenses	44,605	47,047
Intercompany payables	591,792	684,057
Total current liabilities	647,520	739,845
Long-term debt	1,808,535	1,810,833
Other noncurrent liabilities	3,190	2,870
Total liabilities	2,459,245	2,553,548
Total member's interest	1,240,542	1,291,594
Total liabilities and stockholders' equity / member's interest	3,699,787	3,845,142
Summit Materials, LLC | Guarantors
Current assets:
Cash and cash equivalents	5,949	10,254	3,023	4,820
Accounts receivable, net	168,155	183,139
Intercompany receivables	427,497	484,747
Cost and estimated earnings in excess of billings	12,324	9,264
Inventories	222,277	180,283
Other current assets	10,977	6,354
Total current assets	847,179	874,041
Property, plant and equipment, net	1,626,147	1,569,118
Goodwill	1,050,976	976,206
Intangible assets	16,621	16,833
Other assets	159,408	162,711
Total assets	3,700,331	3,598,909
Current liabilities:
Current portion of acquisition-related liabilities	34,601	11,587
Accounts payable	100,108	89,912
Accrued expenses	75,989	79,372
Intercompany payables	393,342	369,918
Billings in excess of costs and estimated earnings	14,736	15,349
Total current liabilities	618,776	566,138
Acquisition-related liabilities	25,285	52,239
Other noncurrent liabilities	201,719	193,801
Total liabilities	845,780	812,178
Total member's interest	2,854,551	2,786,731
Total liabilities and stockholders' equity / member's interest	3,700,331	3,598,909
Summit Materials, LLC | Non Guarantors
Current assets:
Cash and cash equivalents	12,841	14,933	$ 16,442	$ 14,656
Accounts receivable, net	11,988	15,191
Cost and estimated earnings in excess of billings	344	248
Inventories	4,473	4,156
Other current assets	1,533	243
Total current assets	31,179	34,771
Property, plant and equipment, net	36,574	37,047
Goodwill	59,472	61,114
Other assets	1,322	1,271
Total assets	128,547	134,203
Current liabilities:
Accounts payable	6,821	6,749
Accrued expenses	1,655	2,227
Intercompany payables	3,039	4,073
Billings in excess of costs and estimated earnings	395	401
Total current liabilities	11,910	13,450
Other noncurrent liabilities	75,286	75,209
Total liabilities	87,196	88,659
Total member's interest	41,351	45,544
Total liabilities and stockholders' equity / member's interest	$ 128,547	$ 134,203

Guarantor and Non-Guarantor F63

Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Condensed Consolidating Statements of Operations
Revenue	$ 314,421	$ 284,277
Cost of revenue (excluding items shown separately below)	247,861	217,572
Depreciation, depletion, amortization and accretion	46,958	39,748
Operating income	(51,525)	(32,784)
(Loss) income from operations before taxes	(72,654)	(57,286)
Income tax expense (benefit)	(16,706)	(2,178)	$ (2,200)
Net loss	(55,948)	(55,108)
Net income (loss) attributable to member of Summit Materials, LLC	(53,729)	(52,444)
Comprehensive income (loss) income attributable to member of Summit Materials, LLC	(56,292)	(52,444)
Summit Materials, LLC
Condensed Consolidating Statements of Operations
Revenue	314,421	284,277
Cost of revenue (excluding items shown separately below)	247,861	217,572
General and administrative expenses	71,127	59,741
Depreciation, depletion, amortization and accretion	46,958	39,748
Operating income	(51,525)	(32,784)
Other (income) expense, net	(7,655)	(467)
Interest expense (income)	28,570	24,715
(Loss) income from operations before taxes	(72,440)	(57,032)
Income tax expense (benefit)	(3,844)	(2,178)
Net loss	(68,596)	(54,854)
Net income (loss) attributable to noncontrolling interest		(98)
Net income (loss) attributable to member of Summit Materials, LLC	(68,596)	(54,756)
Comprehensive income (loss) income attributable to member of Summit Materials, LLC	(70,705)	(53,638)
Summit Materials, LLC | Eliminations
Condensed Consolidating Statements of Operations
Revenue	(1,418)	(1,508)
Cost of revenue (excluding items shown separately below)	(1,418)	(1,508)
Other (income) expense, net	(18,213)	(16,077)
(Loss) income from operations before taxes	18,213	16,077
Net loss		16,077
Net income (loss) attributable to noncontrolling interest		(98)
Net income (loss) attributable to member of Summit Materials, LLC	18,213	16,175
Comprehensive income (loss) income attributable to member of Summit Materials, LLC	16,104	17,293
Summit Materials, LLC | Issuers
Condensed Consolidating Statements of Operations
General and administrative expenses	20,947	15,050
Depreciation, depletion, amortization and accretion	710	658
Operating income	(21,657)	(15,708)
Other (income) expense, net	17,365	15,410
Interest expense (income)	29,582	23,638
(Loss) income from operations before taxes	(68,604)	(54,756)
Income tax expense (benefit)	(8)
Net loss		(54,756)
Net income (loss) attributable to member of Summit Materials, LLC	(68,596)	(54,756)
Comprehensive income (loss) income attributable to member of Summit Materials, LLC	(70,705)	(53,638)
Summit Materials, LLC | Guarantors
Condensed Consolidating Statements of Operations
Revenue	300,658	276,375
Cost of revenue (excluding items shown separately below)	238,127	211,992
General and administrative expenses	47,177	43,373
Depreciation, depletion, amortization and accretion	44,993	38,439
Operating income	(29,639)	(17,429)
Other (income) expense, net	(6,858)	235
Interest expense (income)	(2,203)	213
(Loss) income from operations before taxes	(20,578)	(17,877)
Income tax expense (benefit)	(3,454)	(2,180)
Net loss		(15,697)
Net income (loss) attributable to member of Summit Materials, LLC	(17,124)	(15,697)
Comprehensive income (loss) income attributable to member of Summit Materials, LLC	(18,119)	(16,109)
Summit Materials, LLC | Non Guarantors
Condensed Consolidating Statements of Operations
Revenue	15,181	9,410
Cost of revenue (excluding items shown separately below)	11,152	7,088
General and administrative expenses	3,003	1,318
Depreciation, depletion, amortization and accretion	1,255	651
Operating income	(229)	353
Other (income) expense, net	51	(35)
Interest expense (income)	1,191	864
(Loss) income from operations before taxes	(1,471)	(476)
Income tax expense (benefit)	(382)	2
Net loss		(478)
Net income (loss) attributable to member of Summit Materials, LLC	(1,089)	(478)
Comprehensive income (loss) income attributable to member of Summit Materials, LLC	$ 2,015	$ (1,184)

Guarantor and Non-Guarantor F64

Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Condensed Consolidating Statements of Operations
Net cash used in operating activities	$ (51,367)	$ (45,539)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(113,993)	(112,333)
Purchase of property, plant and equipment	(49,505)	(51,056)
Proceeds from the sale of property, plant, and equipment	7,788	4,325
Other	1,500	974
Net cash used for investing activities	(154,210)	(158,090)
Cash flow from financing activities:
Capital issuance costs		(638)
Payments on long-term debt	(3,972)	(3,566)
Payments on acquisition-related liabilities	(8,962)	(16,414)
Financing costs		(699)
Distributions from partnership	(9)	(79)
Other	(1,820)	(731)
Net cash provided by financing activities	712	216,244
Impact of cash on foreign currency	(398)	100
Net (decrease) increase in cash	(205,263)	12,715
Cash and cash equivalents-beginning of period	383,556	143,392
Cash and cash equivalents-end of period	178,293	156,107
Summit Materials, LLC
Condensed Consolidating Statements of Operations
Net cash used in operating activities	(51,367)	(45,076)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(113,993)	(112,333)
Purchase of property, plant and equipment	(49,505)	(51,056)
Proceeds from the sale of property, plant, and equipment	7,788	4,325
Other	1,500	974
Net cash used for investing activities	(154,210)	(158,090)
Cash flow from financing activities:
Proceeds from investment by member	15,475	238,629
Capital issuance costs		(638)
Payments on long-term debt	(3,972)	(3,566)
Payments on acquisition-related liabilities	(6,462)	(13,914)
Financing costs		(699)
Distributions from partnership	(2,509)	(2,579)
Other	(1,820)	(732)
Net cash provided by financing activities	712	216,501
Impact of cash on foreign currency	(398)	100
Net (decrease) increase in cash	(205,263)	13,435
Cash and cash equivalents-beginning of period	383,556	142,672
Cash and cash equivalents-end of period	178,293	156,107
Summit Materials, LLC | Eliminations
Cash flow from financing activities:
Loans received from and payments made on loans from other Summit Companies	2,683	(8,558)
Net cash provided by financing activities	2,683	(8,558)
Net (decrease) increase in cash	2,683	(8,558)
Cash and cash equivalents-beginning of period	(12,372)	(10,666)
Cash and cash equivalents-end of period	(9,689)	(19,224)
Summit Materials, LLC | Issuers
Condensed Consolidating Statements of Operations
Net cash used in operating activities	(38,210)	(42,891)
Cash flow from investing activities:
Purchase of property, plant and equipment	(1,664)	(1,115)
Net cash used for investing activities	(1,664)	(1,115)
Cash flow from financing activities:
Proceeds from investment by member	(73,661)	164,795
Capital issuance costs		(638)
Loans received from and payments made on loans from other Summit Companies	(83,090)	(92,904)
Payments on long-term debt	(1,588)	(1,625)
Financing costs		(699)
Distributions from partnership	(2,509)	(2,579)
Other	(827)	(319)
Net cash provided by financing activities	(161,675)	66,031
Net (decrease) increase in cash	(201,549)	22,025
Cash and cash equivalents-beginning of period	370,741	133,862
Cash and cash equivalents-end of period	169,192	155,887
Summit Materials, LLC | Guarantors
Condensed Consolidating Statements of Operations
Net cash used in operating activities	(15,050)	(4,035)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(113,993)	(112,333)
Purchase of property, plant and equipment	(46,363)	(49,931)
Proceeds from the sale of property, plant, and equipment	7,668	4,325
Other	1,500	974
Net cash used for investing activities	(151,188)	(156,965)
Cash flow from financing activities:
Proceeds from investment by member	89,136	73,834
Loans received from and payments made on loans from other Summit Companies	82,599	101,616
Payments on long-term debt	(2,380)	(1,941)
Payments on acquisition-related liabilities	(6,462)	(13,914)
Other	(960)	(392)
Net cash provided by financing activities	161,933	159,203
Net (decrease) increase in cash	(4,305)	(1,797)
Cash and cash equivalents-beginning of period	10,254	4,820
Cash and cash equivalents-end of period	5,949	3,023
Summit Materials, LLC | Non Guarantors
Condensed Consolidating Statements of Operations
Net cash used in operating activities	1,893	1,850
Cash flow from investing activities:
Purchase of property, plant and equipment	(1,478)	(10)
Proceeds from the sale of property, plant, and equipment	120
Net cash used for investing activities	(1,358)	(10)
Cash flow from financing activities:
Loans received from and payments made on loans from other Summit Companies	(2,192)	(154)
Payments on long-term debt	(4)
Other	(33)	(21)
Net cash provided by financing activities	(2,229)	(154)
Impact of cash on foreign currency	(398)	100
Net (decrease) increase in cash	(2,092)	1,786
Cash and cash equivalents-beginning of period	14,933	14,656
Cash and cash equivalents-end of period	$ 12,841	$ 16,442