Summit Materials Holdings II Inactive S-426 Sep 14Registration of securities issued in business combination transactionsFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 28, 2014
Document Information [Line Items]	'
Document Type	'S-4
Amendment Flag	'false
Document Period End Date	28-Jun-14
Entity Registrant Name	'Summit Materials, LLC
Entity Central Index Key	'0001571371
Entity Filer Category	'Non-accelerated Filer
Continental Cement Company, L.L.C. [Member]	'
Document Information [Line Items]	'
Document Type	'S-4
Amendment Flag	'false
Document Period End Date	28-Jun-14
Entity Registrant Name	'Continental Cement Company, L.L.C.
Entity Central Index Key	'0001571274
Entity Filer Category	'Non-accelerated Filer

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012	Dec. 29, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012	Dec. 29, 2012
Current assets:	'	'	'	'
Cash	$20,802	$14,917	'	$27,431
Accounts receivable, net	143,768	99,337	'	100,298
Costs and estimated earnings in excess of billings	21,779	10,767	'	11,575
Due from Affiliates	0	400	'	1,900
Inventories	119,171	96,432	'	92,977
Other current assets	13,235	13,181	'	10,068
Total current assets	318,755	234,634	'	242,349
Property, plant and equipment, net	920,513	831,778	'	813,607
Goodwill	317,323	127,038	'	179,120
Intangible assets, net	15,275	15,147	'	8,606
Other assets	45,774	39,197	'	37,531
Total assets	1,617,640	1,247,794	'	1,281,213
Current liabilities:	'	'	'	'
Current portion of debt	69,220	30,220	'	4,000
Current portion of acquisition-related liabilities	19,039	10,635	'	9,525
Accounts payable	78,244	72,104	'	61,634
Accrued expenses	87,913	57,251	'	49,822
Billings in excess of costs and estimated earnings	4,902	9,263	'	6,926
Total current liabilities	259,318	179,473	'	131,907
Long-term debt	938,290	658,767	'	635,843
Acquisition-related liabilities	40,947	23,756	'	23,919
Other noncurrent liabilities	83,415	77,480	'	84,266
Total liabilities	1,321,970	939,476	'	875,935
Commitments and contingencies	'	'	'	'
Redeemable noncontrolling interest	26,825	24,767	'	22,850
Member's interest:	'	'	'	'
Member's equity	512,297	486,896	'	484,584
Accumulated deficit	-239,213	-198,511	'	-94,085
Accumulated other comprehensive loss	-5,472	-6,045	'	-9,130
Member's interest	267,612	282,340	'	381,369
Noncontrolling interest	1,233	1,211	'	1,059
Total member's interest	268,845	283,551	'	382,428
Total liabilities, redeemable members' interest and member's interest	1,617,640	1,247,794	'	1,281,213
Continental Cement Company, L.L.C. [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash	8	9	599	599
Accounts receivable, net	14,839	7,353	9,924	'
Due from Affiliates	'	2,990	10,303	'
Inventories	14,569	10,402	7,073	'
Other current assets	771	482	815	'
Total current assets	30,187	21,236	28,714	'
Property, plant and equipment, net	309,671	306,204	291,666	'
Goodwill	24,096	24,096	24,096	'
Other assets	13,050	12,576	11,447	'
Total assets	377,004	364,112	355,923	'
Current liabilities:	'	'	'	'
Current portion of debt	1,018	1,018	965	'
Accounts payable	8,587	10,165	7,248	'
Accrued expenses	8,466	9,997	11,523	'
Due to Summit Materials	20,371	'	'	'
Total current liabilities	38,442	21,180	19,736	'
Long-term debt	154,081	154,590	155,394	'
Pension and post-retirement benefit obligations	16,666	19,457	25,568	'
Other noncurrent liabilities	904	850	1,524	'
Total liabilities	210,093	196,077	202,222	'
Commitments and contingencies	'	'	'	'
Redeemable members' interest (100,000,000 Class B units issued and authorized)	23,750	23,450	22,850	22,850
Member's interest:	'	'	'	'
Member's equity	135,211	135,180	135,118	'
Accumulated deficit	14,756	17,029	7,764	'
Accumulated other comprehensive loss	-6,806	-7,624	-12,031	'
Member's interest	143,161	144,585	130,851	130,851
Total liabilities, redeemable members' interest and member's interest	$377,004	$364,112	$355,923	'

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (Unaudited) (USD $)	6 Months Ended		12 Months Ended			6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Revenue:	'	'	'	'	'	'	'	'	'	'
Product	$329,769	$237,181	$593,570	$588,762	$427,419	$27,150	$25,820	$64,181	$65,213	$57,804
Service	145,617	124,490	322,631	337,492	361,657	7,186	6,786	15,490	13,366	8,708
Revenue from related parties:	'	'	'	'	'	'	'	'	'	'
Product	400	'	600	7,900	8,600	8,114	6,979	16,578	16,303	12,269
Service	'	'	'	'	'	'	'	'	'	707
Total revenue	475,386	361,671	916,201	926,254	789,076	42,450	39,585	96,249	94,882	79,488
Cost of revenue (excluding items shown separately below):	'	'	'	'	'	'	'	'	'	'
Product	245,003	181,932	430,172	444,569	317,360	22,963	23,389	46,137	49,541	41,221
Service	115,434	95,984	246,880	268,777	280,294	4,664	4,443	9,105	8,778	6,500
Total cost of revenue	360,437	277,916	677,052	713,346	597,654	27,627	27,832	55,242	58,319	47,721
General and administrative expenses	70,355	73,395	142,000	127,215	95,826	3,868	5,400	8,367	6,706	4,761
Goodwill impairment	'	'	68,202	'	'	'	'	0	0	'
Depreciation, depletion, amortization and accretion	40,695	36,026	72,934	68,290	61,377	7,045	5,750	11,812	10,479	9,984
Transaction costs	4,996	2,464	3,990	1,988	9,120	'	'	'	'	'
Operating (loss) income	-1,097	-28,130	-47,977	15,415	25,099	3,910	603	20,828	19,378	17,022
Other (income) expense, net	-891	163	-1,737	-1,182	-21,244	-11	-72	-90	131	-61
Loss on debt financings	'	3,115	3,115	9,469	'	'	'	'	'	'
Interest expense	40,470	27,849	56,443	58,079	47,784	5,894	5,635	11,053	12,622	14,621
(Loss) from continuing operations before taxes	-40,676	-59,257	-105,798	-50,951	-1,441	'	'	'	'	'
Income tax (benefit) expense	-1,460	-3,347	-2,647	-3,920	3,408	'	'	'	'	'
Income (loss) from continuing operations	-39,216	-55,910	-103,151	-47,031	-4,849	'	'	'	'	'
(Income) loss from discontinued operations	-349	97	528	3,546	5,201	'	'	'	'	'
Net (loss) income	-38,867	-56,007	-103,679	-50,577	-10,050	-1,973	-4,960	9,865	6,625	2,462
Net income (loss) attributable to noncontrolling interest	-569	-1,518	3,112	1,919	695	'	'	'	'	'
Net income (loss) attributable to member of Summit Materials, LLC	($38,298)	($54,489)	($106,791)	($52,496)	($10,745)	'	'	'	'	'

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)	6 Months Ended		12 Months Ended			6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Net income (loss)	($38,867)	($56,007)	($103,679)	($50,577)	($10,050)	($1,973)	($4,960)	$9,865	$6,625	$2,462
Other comprehensive (loss) income:	'	'	'	'	'	'	'	'	'	'
Postretirement curtailment adjustment	-1,346	'	'	'	'	-1,346	'	'	'	'
Pension and postretirement liability adjustment	2,164	'	4,407	-3,648	-5,675	2,164	'	4,407	-3,648	-5,675
Other comprehensive income	818	'	'	'	'	818	'	4,407	-3,648	-5,675
Comprehensive income (loss)	-38,049	-56,007	-99,272	-54,225	-15,725	-1,155	-4,960	14,272	2,977	-3,213
Less comprehensive income (loss) attributable to the noncontrolling interest	-324	-1,518	4,434	824	-675	'	'	'	'	'
Comprehensive loss attributable to member of Summit Materials, LLC	($37,725)	($54,489)	($103,706)	($55,049)	($15,050)	'	'	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended		12 Months Ended			6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Cash flow from operating activities:	'	'	'	'	'	'	'	'	'	'
Net income (loss)	($38,867)	($56,007)	($103,679)	($50,577)	($10,050)	($1,973)	($4,960)	$9,865	$6,625	$2,462
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'	'	'	'	'	'	'	'
Depreciation, depletion, amortization and accretion	43,296	37,404	75,927	72,179	64,983	'	'	'	'	'
Depreciation, depletion, amortization and accretion	40,695	36,026	72,934	68,290	61,377	7,045	5,750	11,812	10,479	9,984
Financing fee amortization	470	1,629	3,256	3,266	2,335	'	'	300	'	'
Share-based compensation expense	1,138	1,114	2,315	2,533	2,484	'	'	'	'	'
Deferred income tax benefit	-525	-2,969	-4,408	-3,468	-1,974	'	'	'	'	'
Net (gain) loss on asset disposals	-76	5,574	12,419	2,564	2,349	'	'	'	'	'
Goodwill impairment	'	'	68,202	'	'	'	'	0	0	'
Bargain purchase gain	'	'	'	'	-12,133	'	'	'	'	'
Revaluation of asset retirement obligations	'	'	'	'	-3,420	'	'	'	'	'
Revaluation of contingent consideration	'	'	'	-409	-10,344	'	'	'	'	'
Loss on debt financings	'	2,989	2,989	9,469	'	'	'	'	'	'
Other	559	755	-1,098	-465	894	887	234	801	-78	308
(Increase) decrease in operating assets, net of acquisitions:	'	'	'	'	'	'	'	'	'	'
Account receivable, net	-28,917	-11,610	9,884	5,201	13,901	-7,699	-3,593	2,695	-1,924	-1,232
Inventories	-17,820	-13,222	499	-1,726	-12,643	-4,168	-2,561	-3,329	2,841	-3,191
Costs and estimated earnings in excess of billings	-10,246	-13,688	196	6,931	-613	'	'	'	'	'
Other current assets	-2,128	-491	-453	3,494	-4,823	-288	66	333	58	-251
Other assets	2,214	-118	-1,708	1,189	-1,016	-550	70	-1,304	308	-2,872
Increase (decrease) in operating liabilities, net of acquisitions:	'	'	'	'	'	'	'	'	'	'
Accounts payable	3,589	6,691	4,067	-6,076	6,612	-158	549	2,093	-907	865
Accrued expenses	8,511	-4,722	-742	17,175	-6,455	-1,887	-2,193	-1,574	6,685	650
Billings in excess of costs and estimated earnings	-4,361	-1,493	1,998	2,589	-8,209	'	'	'	'	'
Pension and post-retirement benefit obligations	'	'	'	'	'	'	'	-1,704	-1,368	-1,644
Other liabilities	-2,717	404	-3,252	-1,590	1,375	-1,973	-1,034	-1,099	-340	-48
Net cash (used for) provided by operating activities	-45,880	-47,760	66,412	62,279	23,253	-10,764	-7,672	18,589	22,379	5,031
Cash flow from investing activities:	'	'	'	'	'	'	'	'	'	'
Acquisitions, net of cash acquired	-234,870	-60,779	-61,601	-48,757	-161,073	'	'	'	'	'
Loans to and repayments from affiliates, net	'	'	'	'	'	'	'	7,118	-10,220	'
Purchases of property, plant and equipment	-49,260	-40,528	-65,999	-45,488	-38,656	-12,166	-15,888	-25,594	-12,805	-7,110
Proceeds from the sale of property, plant and equipment	5,985	7,086	16,085	8,836	7,157	'	'	3	69	168
Other	757	'	'	69	241	'	'	'	-79	'
Net cash used for investing activities	-277,388	-94,221	-111,515	-85,340	-192,331	-12,166	-15,888	-18,473	-23,035	-6,942
Cash flow from financing activities:	'	'	'	'	'	'	'	'	'	'
Capital contributions by member	24,350	'	'	'	103,630	'	'	'	'	'
Proceeds from borrowings	'	'	'	'	'	'	'	'	7,000	36,500
Net proceeds from debt issuance	424,750	189,681	230,817	713,361	96,748	'	'	'	'	'
Principal payments on long-term debt	'	'	'	'	'	-509	-496	-750	-5,783	-34,500
Payments on long-term debt	-109,246	-61,343	-188,424	-697,438	-49,000	'	'	'	'	'
Book overdraft	'	'	'	'	'	356	128	'	'	'
Payments on acquisition-related liabilities	-4,259	-3,426	-9,801	-7,519	-4,593	'	'	'	'	'
Net borrowings from Summit Materials	'	'	'	'	'	23,082	23,337	'	'	'
Financing costs	-6,354	-2,707	'	'	'	'	'	'	'	'
Other	-88	'	-3	-702	-10	'	'	44	-17	-43
Net cash (used for) provided by financing activities	329,153	122,205	32,589	7,702	146,775	22,929	22,969	-706	1,200	1,957
Net (decrease) increase in cash	5,885	-19,776	-12,514	-15,359	-22,303	-1	-591	-590	544	46
Cash-beginning of period	14,917	27,431	27,431	42,790	65,093	9	599	599	55	9
Cash-end of period	20,802	7,655	14,917	27,431	42,790	8	8	9	599	55
Supplemental disclosures of cash flow information	'	'	'	'	'	'	'	'	'	'
Cash interest paid during the period	'	'	'	'	'	$5,935	$7,408	'	'	'

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Redeemable Noncontrolling Interest and Member's Interest (Unaudited) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 29, 2013

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Continental Cement Company, L.L.C. [Member]

Redeemable Noncontrolling Interest [Member]

Member's Equity [Member]

Accumulated Deficit [Member]

Accumulated Other Comprehensive Loss (AOCI) [Member]

Noncontrolling Interest [Member]

Total Member's Interest [Member]

Continental Cement Company, L.L.C. [Member]

Beginning Balance

$486,896

$484,584

$482,707

$376,593

($198,511)

($94,085)

($40,932)

($29,555)

($6,045)

($9,130)

($6,577)

($2,272)

($9,130)

$1,211

$1,059

$1,174

$1,227

$283,551

$382,428

$436,372

$345,993

Beginning Balance

24,767

22,850

21,300

Beginning balance, Redeemable members' interest

23,450

22,850

22,250

21,650

Accretion of redeemable members' interest

300

600

Contributed capital

24,350

103,630

24,350

103,630

Net income

Other comprehensive income (loss)

Share-based compensation

Ending balance, Redeemable members' interest

23,750

23,150

23,450

22,850

22,250

Beginning balance

144,585

130,851

128,412

132,169

135,180

135,118

135,056

135,000

17,029

7,764

1,739

-123

-7,624

-12,031

-8,383

-2,708

Accretion / Redemption value adjustment

-300

-600

2,404

1,788

-2,365

657

632

-2,404

-1,788

2,365

-657

-632

-300

-600

-2,404

-1,788

2,365

-657

-632

Net (loss) income

-1,973

-4,960

9,865

6,625

2,462

-591

-1,488

2,960

1,988

738

-38,298

-54,489

-106,791

-52,496

-10,745

-1,973

-4,960

9,865

6,625

2,462

-30

152

-69

-43

-38,276

-54,519

-106,639

-52,565

-10,788

Other comprehensive income (loss)

818

4,407

-3,648

-5,675

245

1,322

-1,095

-1,370

573

3,085

-2,553

-4,305

818

4,407

-3,648

-5,675

573

3,085

-2,553

-4,305

Repurchase of member's interest

-3

-656

-3

-656

Share-based compensation

1,051

1,114

2,315

2,533

2,484

1,051

1,114

2,315

2,533

2,484

Payment of dividends

-46

-10

-46

-10

Ending balance

143,161

125,622

144,585

130,851

128,412

135,211

135,149

135,180

135,118

135,056

14,756

2,504

17,029

7,764

1,739

-6,806

-12,031

-7,624

-12,031

-8,383

Ending Balance

512,297

485,698

486,896

484,584

482,707

-239,213

-150,362

-198,511

-94,085

-40,932

-5,472

-6,045

-9,130

-6,577

-9,130

1,233

1,029

1,211

1,059

1,174

268,845

327,235

283,551

382,428

436,372

Ending Balance

$26,825

$23,150

$24,767

$22,850

$21,300

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (Continental Cement Company, L.L.C. [Member], USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified	Class B Units [Member]	Class B Units [Member]	Class B Units [Member]	Class A Units [Member]	Class A Units [Member]	Class A Units [Member]
Redeemable,Class B units issued	100,000,000	100,000,000	100,000,000	'	'	'
Redeemable, Class B units authorized	100,000,000	100,000,000	100,000,000	'	'	'
Member's equity, Class A units issued	'	'	'	100	100	100
Member's equity Class A units authorized	'	'	'	100	100	100

Summary_of_Organization_and_Si

Summary of Organization and Significant Accounting Policies

6 Months Ended

12 Months Ended

Jun. 28, 2014

Dec. 28, 2013

Summary of Organization and Significant Accounting Policies

(1) Summary of Organization and Significant Accounting Policies

Summit Materials, LLC (“Summit Materials” or the “Company”) is a vertically-integrated, heavy building materials company. Across its subsidiaries, it is engaged in the manufacturing and sale of aggregates, cement, ready-mixed concrete and asphalt paving mix. It is also engaged in road paving and related construction services. Summit Materials owns and operates quarries, sand and gravel pits, a cement plant, cement distribution terminals, asphalt plants, ready–mixed concrete plants and landfill sites. The operations of Summit Materials are conducted primarily across 14 states, with the most significant portion of the Company’s revenue generated in Texas, Kansas, Kentucky, Missouri and Utah.

SUMMARY OF ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Summit Materials is a 100 percent-owned subsidiary of Summit Materials Holdings L.P. (“Parent”) whose major indirect owners are certain investment funds affiliated with Blackstone Capital Partners V L.P. (“BCP”). Summit Materials has a number of subsidiaries that have individually made a number of acquisitions through 2013. The Company is organized by geographic region and has three operating segments, which are also its reporting segments: the Central; West; and East regions.

Noncontrolling interests represent a 30% redeemable ownership in Continental Cement Company, L.L.C. (“Continental Cement”) and a 20% ownership in Ohio Valley Asphalt, LLC. In 2013, Continental Cement changed its fiscal year from a calendar year to a 52-week year with each quarter composed of 13 weeks ending on a Saturday, consistent with Summit Materials’ fiscal year. Continental Cement’s fiscal year end in 2013 was December 28 compared to the calendar year ended December 31 in 2012 and 2011. The effect of this change to Summit Materials’ financial position, results of operations and liquidity was immaterial.

Summit Materials, LLC (“Summit Materials”) is a vertically integrated construction materials company. Across its subsidiaries, it is engaged in the production and sale of aggregates, cement, ready-mixed concrete, asphalt paving mix and concrete products. Summit Materials, through its subsidiaries (collectively, the “Company”), owns and operates quarries, sand and gravel pits, a cement plant, cement distribution terminals, ready-mixed concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company is organized by geographic region and has three operating segments, which are also its reporting segments: the West; Central; and East regions.

Principles of Consolidation—The consolidated financial statements include the accounts of the Company and its majority owned subsidiaries. All intercompany balances and transactions have been eliminated. The Company attributes consolidated member’s interests 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.

Use of Estimates—The consolidated financial statements of the Company have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”), which require management to make estimates and assumptions that affect the reported amounts and disclosures in the consolidated financial statements. 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, goodwill, intangible and other long-lived assets, pension and other postretirement obligations, asset retirement obligations and the redeemable noncontrolling interest. Estimates also include revenue earned and costs to complete open contracts. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, will be reflected in the Company’s consolidated financial statements in the period in which the change in estimate occurs.

Summit Materials is a wholly owned indirect subsidiary of Summit Materials Holdings L.P., whose major indirect owners are certain investment funds affiliated with Blackstone Capital Partners V L.P. and Silverhawk Summit, L.P.

Business and Credit Concentrations—The majority of Summit Materials’ customers are located in Texas, Kansas, Kentucky, Missouri and Utah. Summit Materials’ accounts receivable consist primarily of amounts due from customers within these areas. Collection of these accounts is, therefore, dependent on the economic conditions in the aforementioned states. However, credit granted within Summit Materials’ trade areas has been granted to a wide variety of customers. No single customer accounted for more than 10% of revenue in 2013, 2012 or 2011. Management does not believe that any significant concentrations of credit exist with respect to individual customers or groups of customers.

The consolidated financial statements of the Company include the accounts of Summit Materials and its wholly and non-wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated.

Accounts Receivable—Accounts receivable are stated at the amount management expects to collect from outstanding balances. Management provides for probable uncollectible amounts through a charge to earnings and a credit to a valuation allowance based on its assessment of the collectability of individual accounts. In establishing the allowance, management considers historical losses adjusted to take into account current market conditions and its customers’ financial condition, the amount of receivables in dispute, the current receivables aging and current payment terms. Balances that remain outstanding after reasonable collection efforts are exercised are written off through a charge to the valuation allowance.

The balances billed but not paid by customers, pursuant to retainage provisions included in contracts, will be due upon completion of the contracts.

Basis of Presentation—These consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with 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 28, 2013. The Company continues to follow the accounting policies set forth in those 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 June 28, 2014, the results of operations and cash flows for the six month periods ended June 28, 2014 and June 29, 2013.

Revenue and Cost Recognition—Revenue for product sales are recognized when evidence of an arrangement exists, the fee is fixed or determinable, title passes, which is generally when the product is shipped, and collection is reasonably assured. Product revenue includes sales of aggregates, cement and other materials to customers, net of discounts, allowances or taxes, as applicable. Internal product sales are eliminated from service revenue in the consolidated statements of operations.

Revenue from construction contracts are included in service revenue and are recognized under the percentage-of-completion accounting method. The percent complete is measured by the cost incurred to date compared to the estimated total cost of each project. This method is used as management considers expended cost to be the best available measure of progress on these contracts, the majority of which are completed within one year, but may occasionally extend beyond one year. 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.

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53 week year occurs approximately once every seven years. The additional week in the 53 week year will be included in the fourth quarter. The Company’s second quarter ended on June 28 and June 29 in 2014 and 2013, respectively. In 2013, Continental Cement Company, L.L.C. (“Continental Cement”), an indirect majority owned subsidiary of Summit Materials, changed its fiscal year to be consistent with the Company’s fiscal year. Prior to fiscal 2013, Continental Cement’s fiscal year was based on the calendar year with quarter-end dates of March 31, June 30, September 30 and December 31. The effect of this change to the Company’s financial position, results of operations and liquidity is immaterial.

Contract costs include all direct material and labor costs and those indirect costs related to contract performance and completion. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are estimable. General and administrative costs are charged to expense as incurred.

Changes in job performance, job conditions and estimated profitability, including those arising from contract penalty provisions and final contract settlements, may result in revisions to costs and income. Such revisions are recognized in the period in which they are determined. An amount equal to contract costs incurred that are attributable to claims is included in revenue when realization is probable and the amount can be reliably estimated.

Substantially all of the Company’s 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 its services. Therefore, the financial results for any interim period are not necessarily 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.

Costs and estimated earnings in excess of billings are composed principally of revenue recognized on contracts (on the percentage-of-completion method) for which billings had not been presented to customers because the amount were not billable under the contract terms at the balance sheet date. In accordance with the contract terms, the unbilled receivables at December 28, 2013 will be billed in 2014. Billings in excess of costs and estimated earnings represent billings in excess of revenue recognized.

Revenue from the receipt of waste fuels is classified as service revenue and is based on fees charged for the waste disposal, which are recognized when the waste is accepted.

Use of Estimates—Preparation of these consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported and the disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, 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 construction work is 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. Management adjusts such estimates and assumptions when circumstances dictate. 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 during the period in which the change in estimate occurs.

Inventories—Inventories consist of stone removed from quarries and processed for future sale, raw materials and finished concrete blocks. Inventories are valued at the lower of cost or market and are accounted for on a first-in first-out basis or an average cost basis. If items become obsolete or otherwise unusable or if quantities exceed what is projected to be sold within a reasonable period of time, they will be charged to costs of production in the period that the items are designated as obsolete or excess inventory. Stripping costs are costs of removing overburden and waste material to access aggregate materials and are recognized in cost of revenue in the same period as the revenue from the sale of the inventory.

Property, Plant and Equipment, net—Property, plant and equipment are recorded at cost, less accumulated depreciation, depletion and amortization. Expenditures for additions and improvements that significantly add to the productive capacity or extend the useful life of an asset are capitalized. Repair and maintenance costs that do not substantially add to the productive capacity or extend the useful life of the asset are expensed as incurred.

Business and Credit Concentrations—The Company’s operations are conducted primarily across 17 states, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah 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 the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that any significant concentrations of credit exist with respect to individual customers or groups of customers. No single customer accounted for more than 10% of total revenue in the six month periods ended June 28, 2014 and June 29, 2013.

Landfill airspace is included in property, plant and equipment at cost and is amortized based on utilization of the asset. Management reassesses the landfill airspace capacity with any changes in value recorded in cost of revenue. Capitalized landfill costs include expenditures for the acquisition of land and related airspace, engineering and permitting costs, cell construction costs and direct site improvement costs.

Upon disposal, the cost and related accumulated depreciation are removed from the Company’s accounts and any gain or loss is included in general and administrative expenses.

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 not be made if earn-out thresholds are not achieved. Contingent consideration obligations are measured at fair value each reporting period, and any adjustments to fair value are recognized in earnings in the period identified. As of June 28, 2014 and December 28, 2013, contingent consideration obligations of $3.6 million and $1.9 million were included in the non-current portion of acquisition-related liabilities and, as of June 28, 2014, $2.5 million was included in the current portion of acquisition related liabilities. The $4.2 million increase in contingent consideration obligations relates to the January 17, 2014 acquisition of Alleyton Resource Corporation, Colorado Gulf, LP and certain assets of Barten Shepard Investments, LP (collectively, “Alleyton”).

Depreciation on property, plant and equipment, including assets subject to capital leases, is computed on a straight-line basis or based on the economic usage over the estimated useful life of the asset. The estimated useful lives are generally as follows:

The fair value of the contingent consideration obligations approximated their carrying value of $6.1 million and $1.9 million as of June 28, 2014 and December 28, 2013, respectively. The fair values are 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. There were no material valuation adjustments to contingent consideration obligations in the six month periods ended June 28, 2014 or June 29, 2013.

Buildings and improvements

7–40 years

Financial Instruments—The Company’s financial instruments include certain acquisition-related liabilities (deferred consideration and noncompete obligations) and debt. The fair value of the deferred consideration and noncompete obligations approximate their carrying value of $46.9 million and $6.9 million, respectively, as of June 28, 2014, and $28.3 million and $4.2 million, respectively, as of December 28, 2013. The $21.3 million increase in the deferred consideration and noncompete obligations primarily relate to the acquisitions completed in 2014. The fair value was 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.

Plant, machinery and equipment

3–40 years

Truck and auto fleet

3–10 years

The fair value of long-term debt approximated $990.8 million and $696.5 million as of June 28, 2014 and December 28, 2013, respectively, compared to its carrying value of $927.8 million and $663.0 million, respectively. Fair value was determined based on observable, or Level 2 inputs, such as interest rates, bond yields and quoted prices in inactive markets.

Mobile equipment and barges

3–20 years

Landfill airspace and improvements

5–60 years

Redeemable Noncontrolling Interest—The Company owns all of the outstanding Class A Units of Continental Cement, which represent a 69.7% economic interest. Continental Cement’s Class B Units, which represent a 30.3% economic interest, are subordinate to the Class A Units. The Class B Units can be put to Continental Cement in the future based on the passage of time, which can be accelerated upon the occurrence of a contingent event; therefore, the noncontrolling interest of the Class B unit holders is classified in temporary equity. The redemption value was based upon the estimated fair value of Continental Cement at the date of acquisition and the Company has elected to accrete changes in the redemption value of the noncontrolling interest over the period from the date of issuance to the earliest anticipated redemption date, which is currently May 2016. The accretion is recognized through an adjustment to accumulated deficit. The redemption value of the redeemable noncontrolling interest as of June 28, 2014 and December 28, 2013 approximated its carrying value.

Depletion of mineral reserves is calculated for proven and probable reserves by the units of production method on a site-by-site basis. Leasehold improvements are amortized on a straight-line basis over the lesser of the asset’s useful life or the remaining lease term.

The Company reviews the carrying value of property, plant and equipment for impairment whenever events or circumstances indicate that the carrying value of an asset may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. Such indicators may include, among others, deterioration in general economic conditions, adverse changes in the markets in which an entity operates, increases in input costs that have a negative effect on earnings and cash flows or a trend of negative or declining cash flows over multiple periods. In addition, assets are assessed for impairment charges when identified for disposition. Projected losses from disposition are recognized in the period in which they become estimable, which may be in advance of the actual disposition. The net loss from asset dispositions recognized in general and administrative expenses in fiscal years 2013, 2012 and 2011 was $12.4 million, $2.6 million and $2.3 million, respectively. No material impairment charges have been recognized on assets held for use in 2013, 2012 or 2011. The losses are commonly a result of the cash flows expected from selling the asset being less than the expected cash flows that could be generated from holding the asset for use.

Accrued Mining and Landfill Reclamation—The mining reclamation reserve and financial commitments for landfill closure and post-closure activities are based on management’s estimate of future cost requirements to reclaim property at both currently operating and closed sites. Estimates of these obligations have been developed based on management’s interpretation of current requirements and proposed regulatory changes and are intended to approximate fair value. Costs are estimated in current dollars, inflated until the expected time of payment, using an inflation rate of 2.5%, and then discounted back to present value using a credit-adjusted, risk-free rate on obligations of similar maturity, adjusted to reflect the Company’s credit rating. Changes in the credit-adjusted, risk-free rate do not change recorded liabilities. However, subsequent increases in the recognized obligations are measured using a current credit-adjusted, risk-free rate. Decreases in the recognized obligations are measured at the initial credit-adjusted, risk-free rate.

Significant changes in inflation rates or the amount or timing of future cost estimates typically result in both (1) a current adjustment to the recorded liability (and corresponding adjustment to the asset) and (2) a change in accretion of the liability and depreciation of the asset to be recorded prospectively over the remaining capacity of the unmined quarry or landfill.

Intangible Assets—The Company’s intangible assets are primarily composed of lease agreements, reserve rights and trade names. The assets related to lease agreements are a result of the submarket royalty rates paid under agreements, primarily, for extracting aggregate. The values were determined as of the respective acquisition dates by a comparison of market-royalty rates to contract-royalty rates. The reserve rights relate to aggregate reserves to which the Company has the rights of ownership, but do not own the reserves. The intangible assets are amortized on a straight-line basis over the lives of the leases. Continental Cement’s trade name composes the majority of the remaining intangible assets. The following table shows intangible assets by type and in total:

December 28, 2013

December 29, 2012

Gross

Accumulated

Net

Gross

Accumulated

Net

Carrying

Amortization

Carrying

Amortization

Carrying

Amount

Leases

10,430

(1,604

)

8,826

8,940

(1,092

)

7,848

Reserve rights

5,890

(221

)

5,669

—

Trade names

1,020

(368

)

652

1,020

(262

)

758

Total intangible assets

17,340

(2,193

)

15,147

9,960

(1,354

)

8,606

Amortization expense in 2013, 2012 and 2011 was $0.8 million, $0.6 million and $0.5 million, respectively. The estimated amortization expense for intangible assets for each of the next five years and thereafter is as follows:

2014

897

2015

897

2016

897

2017

893

2018

893

Thereafter

10,670

Total

15,147

Goodwill—Goodwill represents the purchase price paid in excess of the fair value of net tangible and intangible assets acquired. Goodwill recorded in connection with the Company’s acquisitions is primarily attributable to the expected profitability, assembled workforces of the acquired businesses and the synergies expected to arise after the Company’s acquisition of those businesses. Goodwill is not amortized, but is tested annually for impairment as of the first day of the fourth quarter and whenever events or circumstances indicate that goodwill may be impaired. The test for goodwill impairment is a two-step process to first identify potential goodwill impairment for each reporting unit and then, if necessary, measure the amount of the impairment loss. Goodwill is tested for impairment based on the Company’s operating companies, which management has determined to be the Company’s reporting units, which are one level below its segments in the Central and West regions. The East region is considered to be a single reporting unit.

Income Taxes—As a limited liability company, Summit Materials’ federal and state income tax attributes are generally passed to Parent. However, certain of the Company’s subsidiaries are taxable entities, the provisions for which are included in the consolidated financial statements. For the Company’s taxable entities, deferred income tax assets and liabilities are computed for differences between the tax basis and financial statement amounts that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. A valuation allowance is recognized for deferred tax assets if it is more likely than not that some portion or all of the net deferred tax assets will not be realized.

The Company evaluates the tax positions taken on income tax returns that remain open to examination by the respective tax authorities from prior years and positions expected to be taken on the current year tax returns to identify uncertain tax positions. Interest and penalties are recorded in income tax expense.

Fair Value Measurements—The fair value accounting guidance establishes the following fair value hierarchy that prioritizes the inputs used to measure fair value:

Level 1

—

Unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2

—

Inputs other than Level 1 that are based on observable market data, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical assets or liabilities in inactive markets, inputs that are observable that are not prices and inputs that are derived from or corroborated by observable markets.

Level 3

—

Valuations developed from unobservable data, reflecting the Company’s own assumptions, which market participants would use in pricing the asset or liability.

Assets and liabilities measured at fair value in the consolidated balance sheets as of year-end 2013 and 2012 are as follows:

2013

2012

Accrued expenses:

Current portion of contingent consideration

—

746

Acquisition- related liabilities

Contingent consideration

1,908

Certain acquisitions made by the Company require the payment of additional consideration contingent upon the achievement of specified operating results, referred to as contingent consideration or earn-out obligations. These payments will not be made if earn-out thresholds are not achieved. No material earn-out payments have been made to date.

Summit Materials records contingent consideration at fair value on the acquisition date and then measures its fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. Management of the Company determines the appropriate policies and procedures to be used when determining the fair value of contingent consideration. Its fair values are based on unobservable inputs, or Level 3 assumptions, including projected probability-weighted cash payments and an 8.4% discount rate, which reflects the Company’s credit risk. 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 significantly lower, or higher, fair value measurement. In 2012 and 2011, we recognized reductions to contingent consideration of $0.4 million and $10.3 million, respectively, due primarily to revised estimates of the probability of achieving the specified targets.

Financial Instruments—The Company’s financial instruments include certain acquisition-related liabilities (deferred consideration and noncompete obligations) and debt. The fair value of the deferred consideration and noncompete obligations approximate their carrying value of $28.3 million and $4.2 million, respectively, as of December 28, 2013 and $23.4 million and $7.4 million, respectively, as of December 29, 2012. The fair value was determined based on Level 3 inputs of the fair value hierarchy, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

The fair value of long-term debt was approximately $696.5 million and $670.7 million as of December 28, 2013 and December 29, 2012, respectively, compared to its carrying value of $663.0 million and $639.8 million, respectively. Fair value was determined based on Level 2 inputs of the fair value hierarchy, including observable inputs, specifically quoted prices for these instruments in inactive markets. The fair value of Company’s revolving credit facility approximated its carrying value of $26.0 million at December 28, 2013.

Reclassifications—Certain amounts have been reclassified in prior periods to conform to the presentation in the consolidated financial statements as of and for the year ended December 28, 2013.

Continental Cement Company, L.L.C. [Member]

Summary of Organization and Significant Accounting Policies

-1

Summary of Organization and Significant Accounting Policies

-1

Summary of Organization and Significant Accounting Policies

Continental Cement Company, L.L.C. (“Continental Cement”) produces portland cement at its plant located in Hannibal, Missouri. Cement distribution terminals are maintained in Hannibal and St. Louis, Missouri and Bettendorf, Iowa. The Company’s primary customers are ready-mixed concrete and concrete products producers and contractors located in the Midwestern United States.

(a)

Business Activities and Organization

Continental Cement Company, L.L.C. (the “Company” or “Continental Cement”) produces Portland cement at its plant located in Hannibal, Missouri. Cement distribution terminals are maintained in Hannibal and St. Louis, Missouri and Bettendorf, Iowa. The Company’s primary customers are ready-mixed concrete and concrete products producers and contractors located in the Midwestern United States.

Green America Recycling, L.L.C. (“GAR”), a wholly-owned subsidiary of Continental Cement, is engaged in the business of securing, processing and blending hazardous and nonhazardous waste materials primarily for use as supplemental fuels in the cement manufacturing process. GAR’s primary customers are commercial transportation disposal facilities and petroleum and chemical manufacturers located in the continental United States. Continental Cement and GAR collectively are referred to as the “Company.”

Green America Recycling, L.L.C. (“GAR”), a wholly owned subsidiary of the Company, is engaged in the business of securing, processing and blending hazardous and nonhazardous waste materials primarily for use as supplemental fuels in Continental Cement’s manufacturing process. GAR’s primary customers are commercial transportation disposal facilities and petroleum and chemical manufacturers located in the continental United States.

The Company, a Delaware limited liability company, is governed by the Amended and Restated Continental Cement Limited Liability Company Agreement (as amended, the “LLC Agreement”). As such, liability of the Company’s members is generally limited to the amount of their net investment in the Company. Continental Cement is an indirect non–wholly owned subsidiary of Summit Materials, LLC (“Summit Materials”).

Continental Cement, a Delaware limited liability company, is governed by an amended and restated limited liability company agreement, as amended (the “LLC Agreement”). As such, liability of its members is generally limited to the amount of their net investment in Continental Cement. Continental Cement is an indirect non-wholly owned subsidiary of Summit Materials, LLC (“Summit Materials”).

In 2013, Continental Cement changed its fiscal year from a calendar year to a 52-week year with each quarter composed of 13 weeks ending on a Saturday, consistent with that of Summit Materials. Continental Cement’s fiscal year end in 2013 was December 28 compared to the calendar year ended December 31 in 2012 and 2011. The effect of this change to Continental Cement’s financial position, results of operations and liquidity was immaterial.

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with 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 28, 2013. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

(b)

Principles of Consolidation

The consolidated financial statements of the Company include the accounts of Continental Cement and its wholly owned subsidiary, GAR. All significant intercompany balances and transactions have been eliminated.

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 June 28, 2014 and the results of operations and cash flows for the six month periods ended June 28, 2014 and June 29, 2013.

(c)

Use of Estimates

In 2013, the Company changed its fiscal year from a calendar year to a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday, consistent with that of Summit Materials. The 53 week year occurs approximately once every seven years. The additional week in the 53 week year is included in the fourth quarter. The Company’s six months ended June 28, 2014 included a full 26 weeks, or 182 days, of results compared to the six months ended June 29, 2013, which included 184 days. The effect of this change to the Company’s financial position and results of operations is immaterial.

The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”), which require management to make estimates and assumptions that affect the reported amounts and disclosures in the consolidated financial statements. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangible and other long-lived assets, pension and other postretirement obligations, asset retirement obligations and the redeemable members’ interest. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, will be reflected in the Company’s consolidated financial statements in the period in which the change in estimate occurs.

Substantially all of the Company’s products are consumed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the sales volumes of its products. Therefore, the financial results for any interim period are not necessarily 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.

(d)

Business and Credit Concentrations

The Company’s customers are primarily located in Missouri, Iowa and Illinois. The Company’s accounts receivable balances are due primarily from ready-mixed concrete and concrete products producers and contractors within this area. Collection of these accounts is, therefore, dependent on the economic conditions of the area. However, credit granted within the Company’s trade area has been granted to a wide variety of customers, and management does not believe that any significant concentrations of credit exist with respect to individual customers or groups of customers who are engaged in similar activities that would be similarly affected by changes in economic or other conditions. The Company had approximately 16%, 13% and 14%, of cement sales with companies owned by a certain minority owner of the Company for the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively.

Principles of Consolidation—The consolidated financial statements of the Company include the accounts of Continental Cement and GAR. All significant intercompany balances and transactions have been eliminated.

(e)

Accounts Receivable

Use of Estimates—Preparation of these consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported and the disclosures about contingent assets and liabilities. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangible and other long-lived assets, pension and other postretirement obligations, asset retirement obligations and redeemable members’ interest. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, will be reflected in the Company’s consolidated financial statements for the period in which the change in estimate occurs.

Accounts receivable is stated at the amount management expects to collect from outstanding balances. Management provides for probable uncollected amounts through a charge to earnings and a credit to the allowance for doubtful accounts based on its assessment of the status of individual accounts. In establishing the allowance, management considers historical losses adjusted to take into account current market conditions and the Company’s customers’ financial condition, the amount of receivables in dispute, the current receivables aging and current payment terms. Balances that are still outstanding after management has used reasonable collection efforts are written off through a charge to the allowance for doubtful accounts. Changes in the allowance for doubtful accounts have not been material to the consolidated financial statements.

Business and Credit Concentrations—The majority of the Company’s customers are located in Missouri, Iowa and Illinois. The Company’s accounts receivable consist primarily of accounts of ready-mixed concrete and concrete products producers and contractors located within these states. Therefore, collection of these accounts is dependent on the economic conditions therein. Management does not believe that there are significant concentrations of credit with respect to individual customers or groups of customers, as credit has been granted to many customers within the Company’s market.

(f)

Revenue Recognition

Revenue from the sale of cement is recognized when evidence of an arrangement exists, the fee is fixed or determinable, title passes, which is generally when the product is shipped, and collection is reasonably assured. Cement sales are recorded net of discounts, allowances and sales taxes, as applicable. The Company records freight revenue on a net basis together with freight costs within cost of sales.

Approximately 18% and 16% of cement sales were made to companies owned by a noncontrolling member of the Company during the six months ended June 28, 2014 and June 29, 2013, respectively. The Company has historically had no collection issues with the noncontrolling member, and management expects full collection on all outstanding accounts receivable due from the noncontrolling member.

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.

(g)

Inventories

Inventories of raw materials, work in process and finished goods are carried at the lower of cost (determined using the average cost method) or market. If items become obsolete or otherwise unusable, they will be charged to costs of production when that determination is made by management.

(h)

Property, Plant and Equipment, net

Property, plant and equipment are recorded at cost, less accumulated depreciation and depletion. Expenditures for additions and improvements that significantly add to the productive capacity or extend the useful life of an asset are capitalized. Repair and maintenance costs that do not substantially extend the life of the Company’s property, plant and equipment are expensed as incurred.

Upon disposal, the cost and related accumulated depreciation are removed from the Company’s accounts and any gain or loss is included in operating income.

Depreciation on property, plant and equipment is computed on a straight-line basis. These estimated useful lives are as follows:

Building and improvements

30 – 40 years

Plant, machinery and equipment

3 – 40 years

Mobile equipment and barges

3 – 20 years

Other

3 – 7 years

Depletion of mineral reserves is calculated over proven and probable reserves by the units of production method on a site-by-site basis.

(i)

Accrued Mining Reclamation

The mining reclamation obligations are based on management’s estimate of future cost requirements to reclaim property at quarry sites. Estimates of these obligations have been developed based on management’s interpretation of current requirements and proposed regulatory changes and are intended to approximate fair value. Costs are estimated in current dollars, inflated until the expected time of payment, using an inflation rate of 2.5%, and then discounted back to present value using a risk-free rate on obligations of similar maturity, adjusted to reflect the Company’s credit rating. Changes in the credit-adjusted, risk-free rate do not change recorded liabilities. However, subsequent increases in the recognized obligations are measured using a current credit-adjusted, risk-free rate. Decreases in the recognized obligations are measured at the initial credit-adjusted, risk-free rate.

(j)

Goodwill

Goodwill is the excess of cost over the fair value of net assets of businesses acquired and was $24.1 million as of December 28, 2013 and December 31, 2012. Goodwill is not amortized, but is tested annually for impairment and whenever events or circumstances change that would make it more likely than not that an impairment may have occurred.

Continental Cement performs an annual impairment analysis as of the first day of the fourth quarter of each fiscal year for its one reporting unit. The first step of the goodwill impairment test compares the fair value of the reporting unit to its carrying value. Management estimates the fair value of the reporting unit primarily based on the discounted projected cash flows of the underlying operations. A number of significant assumptions and estimates are required to forecast operating cash flows, including macroeconomic trends in the private construction and public infrastructure industries, expected success in securing future sales and the appropriate interest rate used to discount the projected cash flows. During the 2013 and 2012 annual reviews of goodwill, management concluded that the estimated fair value of the reporting unit was substantially in excess of its carrying value, resulting in no indication of impairment. The Company has recorded no goodwill impairment charges to date.

(k)

Income Taxes

Continental Cement and GAR are limited liability companies that pass their tax attributes for federal and state tax purposes to their members and are generally not subject to federal or state income tax.

(m)

Reclassifications

Certain amounts have been reclassified in prior periods to conform to the presentation in the consolidated financial statements as of and for the year ended December 28, 2013.

ACQUISITIONS

ACQUISITIONS	6 Months Ended			12 Months Ended
ACQUISITIONS	Jun. 28, 2014			Dec. 28, 2013
Business Combinations [Abstract]	'			'
ACQUISITIONS	'			'
	2	ACQUISITIONS		(2) Acquisitions
	The Company completed a number of immaterial acquisitions during 2014 and 2013. The operating results of the acquired businesses have been included in the Company’s results of operations since the respective dates of the acquisitions. Assets acquired and liabilities assumed are measured at their acquisition-date fair value. Goodwill recognized in connection with the Company’s acquisitions is primarily attributable to the expected profitability, assembled workforces and operational infrastructure of the acquired businesses and the synergies expected to result after integration of those acquired businesses. The purchase price allocation for the 2014 acquisitions has not been finalized due to the recent timing of the acquisitions.			The Company has acquired a number of entities since its formation in 2009, which were financed through a combination of debt and contributions from Parent. The operations of each acquisition have been included in the Company’s consolidated results of operations since the respective dates of the acquisitions. The Company measures all assets acquired and liabilities assumed at their acquisition-date fair value.
	2014 Acquisitions			2013 Acquisitions
	West region			Central region

		•	On March 31, 2014, the Company acquired all of the stock of Troy Vines, Inc., an integrated aggregates and ready-mixed concrete business headquartered in Midland, Texas, which serves the Permian Basin region of West Texas. The acquisition was funded with cash on hand.		•		On April 1, 2013, the Company acquired certain aggregates, ready-mixed concrete and asphalt assets of Lafarge North America, Inc. in and around Wichita, Kansas, with borrowings under the Company’s senior secured revolving credit facility.
				West region
		•	On January 17, 2014, the Company acquired all of the membership interests of Alleyton Resource Corporation, Colorado Gulf, LP and certain assets of Barten Shepard Investments, LP, an aggregates and ready-mixed concrete business in Houston, Texas. The Alleyton acquisition was funded with a portion of the proceeds from the January 17, 2014 issue and sale of $260.0 million aggregate principal amount of 10.5% senior notes due 2020 by the Company.
	East region				•		On April 1, 2013, the Company acquired all of the membership interests of Westroc, LLC, an aggregates and ready-mixed concrete provider near Salt Lake City, Utah, with borrowings under the Company’s senior secured revolving credit facility.
				2012 Acquisitions
		•	On June 9, 2014, the Company acquired all of the membership interests of Buckhorn Materials LLC, an aggregates quarry in South Carolina, and Construction Materials Group LLC, a sand pit in South Carolina. The acquisition was funded with borrowings under the Company’s revolving credit facility.	Central region
	2013 Acquisitions
	West region				•		On February 29, 2012, the Company acquired certain assets of Norris Quarries, LLC, an aggregates business in northwest Missouri, with proceeds from debt, including the Company’s senior secured revolving credit facility.
				West region
		•	On April 1, 2013, the Company acquired all of the membership interests of Westroc, LLC, an aggregates and ready-mixed concrete provider near Salt Lake City, Utah, with borrowings under the Company’s revolving credit facility.
					•		On November 30, 2012, the Company acquired all of the stock of Sandco, Inc., an aggregates and ready-mixed concrete business in Colorado, with cash on-hand.
	Central region			East region

		•	On April 1, 2013, the Company acquired certain aggregates, ready-mixed concrete and asphalt assets of Lafarge North America, Inc. in and around Wichita, Kansas, with borrowings under the Company’s revolving credit facility.		•		On October 5, 2012, the Company acquired certain assets of Kay & Kay Contracting, LLC, an aggregates, asphalt and paving business in Kentucky, with cash on-hand.
				Pro Forma Financial Information—The following unaudited supplemental pro forma information presents the financial results as if the 2012 acquisitions occurred on January 1, 2011. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisitions been made on January 1, 2011, nor is it indicative of any future results. The 2013 acquisitions were not material individually or in the aggregate.


						Year ended
						December 28, 2013			December 29, 2012
				Revenue		$	916,201		$	976,797
				Net loss			(103,679	)		(45,976	)

				The purchase price allocation for the 2012 and 2013 acquisitions has been finalized. The following table summarizes aggregated information regarding the fair values of the assets acquired and liabilities assumed as of the respective acquisition dates in 2013 and 2012:


						2013			2012
				Financial assets		$	8,302		$	1,397
				Inventories			3,954			6,988
				Property, plant and equipment			40,580			21,543
				Other assets			52			1,330
				Intangible assets(1)			7,428			3,172
				Financial liabilities			(6,164	)		(944	)
				Other long-term liabilities			(1,050	)		(364	)

				Net assets acquired			53,102			33,122
				Goodwill			16,120			26,230

				Total purchase price			69,222			59,352

				Noncash transactions:
				Acquisition related liabilities			(7,902	)		(10,547	)
				Other			281			(48	)

				Total noncash transactions			(7,621	)		(10,595	)

				Net cash paid for acquisitions		$	61,601		$	48,757


				-1	Intangible assets acquired relate to aggregate reserves to which the Company has the rights of ownership, but do not own the reserves ($5.9 million) and the differential between contractual lease rates and market rates for leases of aggregate reserves and office space. The acquired intangible assets in total, the reserve rights and the lease assets have weighted-average lives of 18 years, 20 years and 11 years, respectively.

GOODWILL

GOODWILL	6 Months Ended										12 Months Ended
GOODWILL	Jun. 28, 2014										Dec. 28, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'										'
Goodwill	'										'
	3	GOODWILL									(3) Goodwill
	Changes in the carrying amount of goodwill, by reportable segment, from December 28, 2013 to June 28, 2014 are summarized as follows:										As of December 28, 2013, the Company had eight reporting units with goodwill for which the annual goodwill impairment test was completed. The first step of the goodwill impairment test employed by the Company compares the fair value of the reporting units to their carrying values. Management estimates the fair value of the reporting units primarily based on the discounted projected cash flows of the underlying operations. A number of significant assumptions and estimates are required to forecast operating cash flows, including macroeconomic trends in the public infrastructure and private construction industry, the timing of work embedded in backlog, performance and profitability under contracts, expected success in securing future sales and the appropriate interest rate used to discount the projected cash flows. These assumptions may vary significantly among the reporting units. This discounted cash flow analysis is corroborated by “top-down” analyses, including a market assessment of the Company’s enterprise value.
											During the annual test performed as of the first day of the fourth quarter of 2013, management concluded that the estimated fair value of the Utah-based operations in the West region and the East region were less than their carrying values. The estimated fair value of these operating units was estimated by applying a 50 percent weighting to both the discounted cash flow valuation and the market assessment, a discount rate of 11.0% and internal growth projections.
											The second step of the test requires the allocation of the reporting unit’s fair value to its assets and liabilities, including any unrecognized intangible assets, in a hypothetical analysis that calculates the implied fair value of goodwill as if the reporting unit was being acquired in a business combination. If the implied fair value of goodwill is less than the carrying value, the difference is recorded as an impairment loss. Based on the step two analysis, goodwill impairment charges recognized in the year ended December 28, 2013 was $68.2 million, as a result of current uncertainties in the timing of a sustained recovery in the construction industry. No impairment charges were recognized prior to 2013.
			West		Central		East		Total
	Balance, December 28, 2013		$	54,249	$	72,789	$	—	$	127,038	The following table presents goodwill by reportable segments and in total:
	Acquisitions			164,125		—		26,160		190,285

	Balance, June 28, 2014		$	218,374	$	72,789	$	26,160	$	317,323		Central		West			East			Total
											Beginning Balance- December 31, 2011	$	53,585	$	91,598		$	8,192		$	153,375
											Acquisitions		19,204		(205	)		6,746			25,745

											Balance, December 29, 2012		72,789		91,393			14,938			179,120
											Acquisitions		—		16,120			—			16,120
											Impairment		—		(53,264	)		(14,938	)		(68,202	)

											Balance, December 28, 2013	$	72,789	$	54,249		$	—		$	127,038

Discontinued_Operations

Discontinued Operations	12 Months Ended
Discontinued Operations	Dec. 28, 2013
Discontinued Operations And Disposal Groups [Abstract]	'
Discontinued Operations	'
	(4) Discontinued Operations
	The Company’s discontinued operations include a railroad construction and repair business (referred to herein as railroad), environmental remediation operations and certain concrete paving operations. The railroad business involved building and repairing railroad sidings. The environmental remediation operations primarily involved the repair of retaining walls along highways in Kentucky and the removal and remediation of underground fuel storage tanks. The railroad and environmental remediation operations were sold in 2012 in separate transactions for aggregate proceeds of $3.1 million. The concrete paving operations were wound down in the second quarter of 2013 and, as of March 7, 2014, all assets have been sold. The results of these operations have been removed from the results of continuing operations for all periods presented. Prior to recognition as discontinued operations, all of these businesses were included in the East region’s operations.
	Debt and interest expense were not allocated to these businesses since there was no debt specifically attributable to the operations. The discontinued businesses are organized within a limited liability company that 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. The railroad, environmental remediation and concrete paving businesses’ revenue and loss before income tax expense, including an immaterial gain on sale, in fiscal years 2013, 2012 and 2011 are summarized below:


		2013		2012		2011
	Total revenue	$	3,884	$	50,152	$	49,537
	Loss from discontinued operations before income tax expense		528		3,546		5,201

ACCOUNTS_RECEIVABLE_NET

ACCOUNTS RECEIVABLE, NET	6 Months Ended								12 Months Ended
ACCOUNTS RECEIVABLE, NET	Jun. 28, 2014								Dec. 28, 2013
Accounts Receivable, net	'								'
	4	ACCOUNTS RECEIVABLE, NET							(5) Accounts Receivable, Net
	Accounts receivable, net consisted of the following as of June 28, 2014 and December 28, 2013:								Accounts receivable, net consists of the following as of year-end 2013 and 2012:


			June 28,			December 28,					2013			2012
			2014			2013			Trade accounts receivable		$	85,188		$	88,637
	Trade accounts receivable		$	131,026		$	85,188		Retention receivables			15,966			13,181
	Retention receivables			14,185			15,966		Receivables from related parties			202			1,871
	Receivables from related parties			1,262			202
									Accounts receivable			101,356			103,689
	Accounts receivable			146,473			101,356		Less: Allowance for doubtful accounts			(2,019	)		(3,391	)
	Less: Allowance for doubtful accounts			(2,705	)		(2,019	)
									Accounts receivable, net		$	99,337		$	100,298
	Accounts receivable, net		$	143,768		$	99,337
									Retention receivables are amounts earned by the Company, but held by customers until projects have been fully completed or near completion. Amounts are expected to be billed and collected within a year.
	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 expected to be billed and collected within one year.
Continental Cement Company, L.L.C. [Member]	'								'
Accounts Receivable, net	'								'
	-2	Accounts Receivable, net							-2	Accounts Receivable, net
	Accounts receivable, net consists of the following as of June 28, 2014 and December 28, 2013:								Accounts receivable, net consists of the following as of year-end 2013 and 2012:


			June 28, 2014			December 28, 2013					2013			2012
	Trade accounts receivable from unaffiliated entities		$	13,455		$	6,961		Trade accounts receivable from unaffiliated entities		$	6,961		$	8,859
	Trade accounts receivable from related parties			1,628			422		Trade accounts receivable from related parties			422			1,193

	Accounts receivable			15,083			7,383		Accounts receivable			7,383			10,052
	Less: allowance for doubtful accounts			(244	)		(30	)	Less: allowance for doubtful accounts			(30	)		(128	)

	Accounts receivable, net		$	14,839		$	7,353		Accounts receivable, net		$	7,353		$	9,924

Inventories

Inventories	6 Months Ended						12 Months Ended
Inventories	Jun. 28, 2014						Dec. 28, 2013
Inventories	'						'
	5	INVENTORIES					(6) Inventories
	Inventories consisted of the following as of June 28, 2014 and December 28, 2013:						Inventories consist of the following as of year-end 2013 and 2012:


			June 28,		December 28,				2013		2012
			2014		2013		Aggregate stockpiles		$	70,300	$	62,872
	Aggregate stockpiles		$	80,232	$	70,300	Finished goods			11,207		9,342
	Finished goods			14,104		11,207	Work in process			2,623		2,679
	Work in process			4,629		2,623	Raw materials			12,302		18,084
	Raw materials			20,206		12,302
							Total		$	96,432	$	92,977
	Total		$	119,171	$	96,432

Continental Cement Company, L.L.C. [Member]	'						'
Inventories	'						'
	-3	Inventories					-3	Inventories
	Inventories consist of the following as of June 28, 2014 and December 28, 2013:						Inventories consist of the following as of year-end 2013 and 2012:


			June 28, 2014		December 28, 2013				2013		2012
	Raw materials		$	972	$	972	Raw materials		$	972	$	475
	Work-in-process			4,629		2,623	Work-in-process			2,623		2,248
	Finished goods			8,968		6,807	Finished goods			6,807		4,350

	Total inventories		$	14,569	$	10,402	Total inventories		$	10,402	$	7,073

Property_Plant_and_Equipment_n

Property, Plant and Equipment, net	12 Months Ended
Property, Plant and Equipment, net	Dec. 28, 2013
Property, Plant and Equipment, net	'
	(7) Property, Plant and Equipment, net
	Property, plant and equipment, net consist of the following as of year-end 2013 and 2012:


			2013			2012
	Land (mineral bearing) and asset retirement costs		$	107,007		$	106,135
	Land (non-mineral bearing)			81,331			69,560
	Buildings and improvements			77,535			78,168
	Plants, machinery and equipment			680,942			623,949
	Truck and auto fleet			19,165			19,399
	Landfill airspace and improvements			46,841			46,841
	Construction in progress			29,560			20,734
	Other			1,779			5,134

	Property, plant and equipment			1,044,160			969,920
	Less accumulated depreciation, depletion and amortization			(212,382	)		(156,313	)

	Property, plant and equipment, net		$	831,778		$	813,607

	Depreciation, depletion and amortization expense of property, plant and equipment was $71.4 million, $68.6 million and $61.8 million for the years ended December 28, 2013, December 29, 2012 and December 31, 2011, respectively.
	Property, plant and equipment at year-end 2013 and 2012 include $11.3 million (net of $1.3 million accumulated amortization) and $3.1 million (net of $0.2 million accumulated amortization), respectively, of capital leases for certain equipment and a building. Approximately $2.1 million of the future obligations associated with the capital leases are included in accrued expenses and the present value of the remaining capital lease payments is included in other noncurrent liabilities on the consolidated balance sheets. Future minimum rental commitments under long-term capital leases are $2.1 million, $1.1 million, $2.9 million, $0.4 million and $0.4 million for the years ended 2014, 2015, 2016, 2017 and 2018, respectively.
Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment, net	'
	-4	Property, Plant and Equipment, net
	Property, plant and equipment, net consist of the following as of year-end 2013 and 2012:


			2013			2012
	Land (non-mineral bearing)		$	4,605		$	4,605
	Land (mineral bearing) and asset retirement costs			16,524			15,449
	Buildings and improvements			40,795			40,681
	Plants, machinery and equipment			247,681			231,454
	Mobile equipment and barges			8,060			7,859
	Construction in progress			23,394			15,301
	Other			1,845			1,373

	Property, plant and equipment			342,904			316,722
	Less accumulated depreciation, depletion and amortization			(36,700	)		(25,056	)

	Property, plant and equipment, net		$	306,204		$	291,666

	The Company is developing an underground mine through which over 200 years of limestone reserves may be accessed. Limestone is a raw material used in the production of cement. As of year-end 2013 and 2012, the underground mine development costs included in construction in progress totaled $22.9 million and $6.6 million, respectively. Costs for mine development are capitalized and include costs incurred for site preparation and development of the mine.

	Depreciation and depletion expense of property, plant and equipment was $11.6 million, $10.3 million and $9.8 million, for the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively.

Debt

Debt	6 Months Ended						12 Months Ended
Debt	Jun. 28, 2014						Dec. 28, 2013
Debt Disclosure [Abstract]	'						'
DEBT	'						'
	7	DEBT

	Debt consisted of the following as of June 28, 2014 and December 28, 2013:

							(8) Debt
							Debt as of year-end 2013 and 2012 are summarized as follows:
			June 28,		December 28,
			2014		2013
	Revolver		$	65,000	$	26,000
								2013			2012
							Senior secured revolving credit facility	$	26,000		$	—
	Long-term debt:
	$510.0 million senior notes, including a $17.3 million net premium at June 28, 2014 and $250 million senior notes, net of $4.0 million discount at December 28, 2013			527,319		245,971	Long-term debt:
	$417.8 million credit facility, term loan, net of $2.6 million and $2.9 million discount at June 28, 2014 and December 28, 2013, respectively			415,191		417,016	$250.0 million senior notes, net of discount of $4.0 million at December 28, 2013 and $4.7 million at December 29, 2012	$	245,971		$	245,303
							$419.9 million senior secured term loan credit facility, net of discount of $2.9 million at December 28, 2013 and $3.5 million at December 29, 2012		417,016			394,540
	Total			942,510		662,987
	Current portion of long-term debt			4,220		4,220	Total		662,987			639,843
							Current portion of long-term debt		4,220			4,000
	Long-term debt		$	938,290	$	658,767
							Long-term debt	$	658,767		$	635,843

	The contractual payments of long-term debt, including current maturities, for the five years subsequent to June 28, 2014, are as follows:						Accrued interest expense on long-term debt as of year-end 2013 and 2012 was $17.1 million and $19.7 million, respectively, and is included in accrued expenses on the consolidated balance sheets.
							The total contractual payments of long-term debt for the five years subsequent to December 28, 2013 are as follows:


	2014 (six months)		$	2,110
	2015			5,275			2014	$	4,220
	2016			4,220			2015		4,220
	2017			4,220			2016		5,275
	2018			3,165			2017		4,220
	2019			398,790			2018		3,165
	Thereafter			510,000			Thereafter		648,790

	Total			927,780			Total		669,890
	Plus: Original issue net premium			14,730			Less: Original issue discount		(6,903	)

	Total debt		$	942,510			Total debt	$	662,987

							Summit Materials and Summit Materials Finance Corp. issued $250.0 million aggregate principal amount of 10.5% Senior Notes due January 31, 2020 (“Senior Notes”) under an indenture dated January 30, 2012 (as amended and supplemented, the “Indenture”). In addition to the Senior Notes, the Company has credit facilities which provide for term loans in an aggregate amount of $422.0 million and revolving credit commitments in an aggregate amount of $150.0 million (the “Senior Secured Credit Facilities”). The debt was initially issued with an original issuance discount of $9.5 million, which was recorded as a reduction to debt and is being accreted as interest expense over the term of the debt. As a result of these transactions, $9.5 million of financing fees were charged to earnings in the year ended December 29, 2012.
							Senior Notes—The Senior Notes bear interest at 10.5% per year, payable semi-annually in arrears; interest payments commenced on July 31, 2012. The Indenture contains covenants limiting, among other things, the Company 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 the Company’s assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The Indenture also contains customary events of default. As of December 28, 2013 and December 29, 2012, the Company was in compliance with all covenants.

	Senior Notes—Summit Materials and its wholly-owned indirect subsidiary, Summit Materials Finance Corp. (“Finance Corp.” and, together with Summit Materials, the “Issuers”), are co-issuers of the 10.5% Senior Notes due January 31, 2020 (the “Senior Notes”) that have been issued under an indenture dated as of January 30, 2012 (as amended and supplemented, the “Indenture”). The Senior Notes bear interest at 10.5% per year, payable semi-annually in arrears. The Indenture contains covenants limiting, among other things, the ability of Summit Materials and its restricted subsidiaries 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 the Company’s assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The Indenture also contains customary events of default.						Senior Secured Credit Facilities—Under the Senior Secured Credit Facilities, the Company has entered into term loans totaling $422.0 million with required principal repayments of 0.25% of term debt due on the last business day of each March, June, September and December. In February 2013, the Company consummated a repricing, which included additional borrowings of $25.0 million, an interest rate reduction of 1.0% and a deferral of the March 2013 principal payment. The unpaid principal balance is due in full on the maturity date, which is January 30, 2019. As a result of this repricing, $3.1 million of financing fees were charged to earnings in the year ended December 28, 2013. These restrictions also will not prevent us from incurring obligations that do not constitute indebtedness. Our senior secured credit facilities include an uncommitted incremental facility that will allow us the option to increase the amount available under the term loan facility and/or the senior secured revolving credit facility by (i) $135.0 million plus (ii) an additional amount so long as we are in pro forma compliance with a consolidated first lien net leverage ratio. The term loans bear interest per annum equal to, at the Company’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) the British Bankers Association London Interbank Offered Rate (“LIBOR”) plus 1.00%, subject to a base rate floor of 2.25%, plus an applicable margin of 2.75% 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, subject to a LIBOR floor of 1.25% plus an applicable margin of 3.75% for LIBOR rate loans. The interest rate in effect at December 28, 2013 was 5.0%.
							Under the Senior Secured Credit Facilities, the Company has revolving credit commitments of $150.0 million. The revolving credit facility matures on January 30, 2017 and bears interest per annum equal to, at the Company’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 2.5% 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 3.5% for LIBOR rate loans. The interest rate in effect at December 28, 2013 was 4.4%.
	The Issuers issued $250.0 million aggregate principal amount of Senior Notes (the “Existing Notes”) in January 2012. On January 17, 2014, the Issuers issued an additional $260.0 million aggregate principal amount of Senior Notes (the “Additional Notes”), receiving proceeds of $282.8 million, before payment of fees and expenses and including a $22.8 million premium. The proceeds from the sale of the Additional Notes were used for the purchase of Alleyton, to make payments on the Company’s Revolver (discussed and defined below) and for general corporate purposes. The Additional Notes are treated as a single series with the Existing Notes and have substantially the same terms as those of the Existing Notes. The Additional Notes and the Existing Notes vote as one class under the Indenture.						There was $26.0 million outstanding under the revolver facility as of December 28, 2013, leaving remaining borrowing capacity of $105.7 million, which is net of $18.3 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.
							The Company must adhere to certain financial covenants related to its debt and interest leverage ratios, as defined in the Senior Secured Credit Facilities. The consolidated first lien net leverage ratio, reported each quarter, should be no greater than 4.75:1.0 from January 1, 2013 through June 30, 2014; 4.50:1.0 from July 1, 2014 through June 30, 2015, and 4.25:1.0 thereafter. The interest coverage ratio must be at least 1.70:1.0 from January 1, 2013 through December 31, 2014 and 1.85:1.0 thereafter. As of December 28, 2013 and December 29, 2012, the Company was in compliance with all covenants. The Company’s 100 percent-owned subsidiary companies and its non wholly-owned subsidiary, Continental Cement, subject to certain exclusions and exceptions are named as subsidiary guarantors of the Senior Notes and the Senior Secured Credit Facilities. In addition, the Company has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities.
	Senior Secured Credit Facilities—The Company has a senior secured credit facilities (the “Senior Secured Credit Facilities”) providing for term loans in an aggregate amount of $422.0 million (the “Term Debt”) and revolving credit commitments in an aggregate amount of $150.0 million (the “Revolver”). The Company is required to make principal repayments of 0.25% of borrowings under the Term Debt on the last business day of each March, June, September and December. The current outstanding principal amount of Term Debt and applicable interest rate reflect the terms of a repricing consummated by the Company in February 2013, which included additional borrowings of $25.0 million, an interest rate reduction of 1.0% and a deferral of the March 2013 principal payment. The unpaid principal balance of Term Debt is due in full on the maturity date, which is January 30, 2019. On January 16, 2014, the Senior Secured Credit Facilities was amended to allow for the issuance of the Additional Notes.						As of December 28, 2013 and December 29, 2012, $11.5 million and $12.6 million, respectively, of deferred financing fees were being amortized over the term of the debt using the effective interest method.

	The Revolver matures on January 30, 2017 and bears interest per annum equal to an applicable margin of 3.25% plus, at the Company’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) the British Bankers Association London Interbank Offered Rate (“LIBOR”) plus 1.00% or (ii) a British Bankers Association LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs. As of June 28, 2014, the borrowing capacity under the Revolver was $62.2 million, which is net of $22.8 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.

	The Company must adhere to certain financial covenants related to its borrowings under the Senior Secured Credit Facilities and interest leverage ratios, as defined in the Senior Secured Credit Facilities. The consolidated first lien net leverage ratio, reported each quarter, should be no greater than 4.75:1.0 from April 1, 2012 through June 30, 2014; 4.50:1.0 from July 1, 2014 to June 30, 2015, and 4.25:1.0 thereafter. The interest coverage ratio must be at least 1.70:1.0 from January 1, 2013 to December 31, 2014 and 1.85:1.0 thereafter.

	As of June 28, 2014 and December 28, 2013, the Company was in compliance with all covenants applicable to the Senior Notes and the Senior Secured Credit Facilities. The Company’s wholly-owned subsidiary companies and its non wholly-owned subsidiary, Continental Cement, are named as issuers or guarantors, as applicable, of the Senior Notes and the Senior Secured Credit Facilities. In addition, the Company has pledged substantially all of its assets as collateral for the Senior Secured Credit Facilities.



	Accrued interest on long-term debt as of June 28, 2014 and December 28, 2013 was $27.4 million and $17.1 million, respectively. Interest expense related to the debt totaled $36.5 million and $24.6 million for the six months ended June 28, 2014 and ended June 29, 2013, respectively. As of June 28, 2014 and December 28, 2013, $16.3 million and $11.5 million, respectively, of deferred financing fees were being amortized over the term of the debt using the effective interest method.

Members_Interest

Member's Interest	12 Months Ended
Member's Interest	Dec. 28, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Member's Interest	'
	(9) Member’s Interest
	The Company’s membership interests are held by Parent. Business affairs of the Company are managed by the Board of Directors (“Board”) of Summit Materials Holdings, GP, Ltd., the general partner of Parent, which, as of December 28, 2013, was composed of six directors. Directors of the Board are appointed by the unit holders of Parent, which is the indirect sole member of the Company.

INCOME_TAXES

INCOME TAXES	6 Months Ended		12 Months Ended
INCOME TAXES	Jun. 28, 2014		Dec. 28, 2013
Income Tax Disclosure [Abstract]	'		'
INCOME TAXES	'		'
	8	INCOME TAXES	(10) Income Taxes
			For the years ended 2013, 2012 and 2011, income taxes consist of the following:
	Summit Materials 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 and state income tax returns due to their status as C corporations. The provision for income taxes is composed of federal, state and local income taxes for the subsidiary entities that have C corporation status.

	The effective income tax rate for these entities differs from the statutory federal rate primarily due to (1) depletion expense and domestic production activities deduction, which are allowed as deductions for tax purposes but not recorded under GAAP, (2) state income taxes and the effect of graduated tax rates and (3) certain non-recurring items, such as differences in the treatment of transaction costs, which are often not deductible for tax purposes.			2013			2012			2011
			Provision for income taxes:
	As of June 28, 2014 and December 28, 2013, the Company has 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 for the six month periods ended June 28, 2014 and June 29, 2013.		Current	$	1,761		$	(452	)	$	5,382
			Deferred		(4,408	)		(3,468	)		(1,974	)

			Income tax (benefit) expense	$	(2,647	)	$	(3,920	)	$	3,408

			The effective tax rate on pre-tax income differs from the U.S. statutory rate due to the following:


				2013			2012			2011
			Income tax benefit at federal statutory tax rate	$	(37,160	)	$	(19,074	)	$	(6,895	)
			Book loss not subject to income tax		32,801			16,167			13,790
			State and local income taxes		130			(90	)		666
			Depletion expense		(411	)		(377	)		(372	)
			Domestic production activities deduction		—			—			(273	)
			Goodwill impairment		1,046			—			—
			Bargain purchase gain		—			—			(4,250	)
			Effective rate change		—			(532	)		627
			Valuation allowance		729			36			(360	)
			Other		218			(50	)		475

			Income tax (benefit) provision	$	(2,647	)	$	(3,920	)	$	3,408

			The following table summarizes the components of the net deferred income tax liability as of year-end 2013 and 2012:


				2013			2012
			Deferred tax assets (liabilities):
			Mining reclamation reserve	$	1,502		$	1,449
			Accelerated depreciation		(33,146	)		(34,733	)
			Net operating loss		2,227			2,134
			Capital losses on securities		997			989
			Landfill closure reserve		(63	)		(30	)
			Working capital (e.g., accrued compensation, prepaid assets)		2,399			3,101

			Deferred tax liabilities, net		(26,084	)		(27,090	)
			Less valuation allowance on loss carryforwards		(1,826	)		(1,025	)

			Total	$	(27,910	)	$	(28,115	)

			Included in accompanying consolidated balance sheets under the following captions:
			Other current assets	$	2,316		$	2,275
			Other noncurrent liability		(30,226	)		(30,390	)

			Total	$	(27,910	)	$	(28,115	)

			In assessing the realizability of deferred tax assets as of year-end 2013 and 2012, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. 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 (including the effect of available carryback and carryforward periods), projected future taxable income and tax-planning strategies in making this assessment. Management anticipates the deferred income tax asset related to losses on securities and net operating losses will not be fully utilized before their expiration in 2014; therefore, a valuation allowance has been recorded as of year-end 2013 and 2012. In 2011, $0.8 million of capital loss was carried back for a tax benefit recovery of $0.3 million. The remaining capital loss of $1.0 million is not expected to be utilized; therefore, the remaining balance has been fully reserved in the valuation allowance as of year-end 2013. At December 28, 2013, the Company has net operating loss carryforwards for federal and state income tax purposes of $5.2 million and $0.7 million, respectively, which are available to offset future federal and state taxable income, if any, through 2033.
			Summit Materials does not have any uncertain tax positions as of December 28, 2013. Tax years from 2010 to 2013 remain open and subject to audit by federal and state tax authorities. No income tax expense or benefit was recognized in other comprehensive loss in 2013, 2012 or 2011.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 28, 2013
Employee Benefit Plans	'
	(11) Employee Benefit Plans
	Deferred Compensation Plan—The Company sponsors employee 401(k) savings plans for all salaried employees and certain union employees. The plans provide for various required and discretionary Company matches of employees’ eligible compensation contributed to the plans. The expense for all defined contribution plans amounted to $2.3 million, $2.2 million and $1.9 million for the years ended December 28, 2013, December 29, 2012 and December 31, 2011, respectively.
	Defined Benefit and Other Postretirement Benefits Plans—The Company’s subsidiary, Continental Cement, sponsors two noncontributory defined benefit pension plans for hourly and salaried employees. The salaried employee pension plan was closed to new participants and frozen in January 2000 and the hourly employee pension plan was closed to new participants in May 2003 and frozen in January 2014. Pension benefits for certain eligible hourly employees are based on a monthly pension factor for each year of credited service. Pension benefits for certain eligible salaried employees are generally based on years of service and average eligible compensation.
	Continental Cement also sponsors unfunded healthcare and life insurance benefits plan for certain eligible retired employees. Effective January 1, 2012, the Company eliminated all future retiree health and life coverage for active salaried, nonunion hourly and certain union employees that retire on or after January 1, 2012. Effective January 1, 2014, the plan was amended to eliminate all future retiree health and life coverage for the remaining union employees.
	The funded status of the pension and other postretirement benefit plans is recognized in the consolidated balance sheets as the difference between the fair value of plan assets and the benefit obligations. For defined benefit pension plans, the benefit obligation is the projected benefit obligation (“PBO”) and for the other postretirement benefit plans, the benefit obligation is the accumulated postretirement benefit obligation (“APBO”). The PBO represents the actuarial present value of benefits expected to be paid upon retirement based on estimated future compensation levels. However, since the plans’ participants are not subject to future compensation increases, the plans’ PBO equals the APBO. The APBO represents the actuarial present value of postretirement benefits attributed to employee services already rendered. The fair value of plan assets represents the current market value of assets held by an irrevocable trust fund for the sole benefit of participants. The measurement of the benefit obligations are based on the Company’s estimates and actuarial valuations. These valuations reflect the terms of the plan and use participant-specific information, such as compensation, age and years of service, as well as certain assumptions that require significant judgment, including estimates of discount rates, expected return on plan assets, rate of compensation increases, interest-crediting rates and mortality rates.
	The Company uses its fiscal year-end as the measurement date for its defined benefit pension and other postretirement benefit plans.

	Obligations and Funded Status—The following information is as of year-end 2013 and 2012 and for the years ended December 28, 2013, December 29, 2012 and December 31, 2011:


			2013								2012
			Pension				Other				Pension				Other
			benefits				benefits				benefits				benefits
	Change in benefit obligations:
	Beginning of period		$	28,674			$	15,810			$	26,514			$	14,467
	Service cost			295				236				276				207
	Interest cost			963				513				1,055				585
	Actuarial (gain) loss			(2,674	)			(1,048	)			2,347				1,597
	Special termination benefits			—				39				—				—
	Benefits paid			(1,614	)			(1,395	)			(1,518	)			(1,046	)

	End of period			25,644				14,155				28,674				15,810

	Change in fair value of plan assets:
	Beginning of period			17,863				—				16,639				—
	Actual return on plan assets			1,512				—				1,205				—
	Employer contributions			1,313				1,395				1,537				1,046
	Benefits paid			(1,614	)			(1,395	)			(1,518	)			(1,046	)

	End of period			19,074				—				17,863				—

	Funded status of plans		$	(6,570	)		$	(14,155	)		$	(10,811	)		$	(15,810	)

	Current liabilities		$	—			$	(1,268	)		$	—			$	(1,055	)
	Noncurrent liabilities			(6,570	)			(12,887	)			(10,811	)			(14,755	)

	Liability recognized		$	(6,570	)		$	(14,155	)		$	(10,811	)		$	(15,810	)

	Amounts recognized in accumulated other comprehensive income:
	Net actuarial loss		$	4,831			$	4,139			$	8,056			$	5,501
	Prior service cost			—				(1,346	)			—				(1,526	)

	Total amount recognized		$	4,831			$	2,793			$	8,056			$	3,975

	The amount recognized in accumulated other comprehensive income (“AOCI”) is the actuarial loss and prior service cost, which has not yet been recognized in periodic benefit cost, adjusted for amounts allocated to the redeemable noncontrolling interest. At December 28, 2013, the actuarial loss expected to be amortized from AOCI to periodic benefit cost in 2014 is $0.1 million and $0.2 million for the pension and postretirement obligations, respectively.


			2013								2012								2011
			Pension				Other				Pension				Other				Pension				Other
			benefits				benefits				benefits				benefits				benefits				benefits
	Amounts recognized in other comprehensive (gain) loss:
	Net actuarial (gain) loss		$	(2,838	)		$	(1,048	)		$	2,444			$	1,597			$	4,066			$	3,390
	Prior service cost			—				180				—				—				—				(1,705	)
	Amortization of prior year service cost			—				—				—				180				—				—
	Amortization of (gain) loss			(387	)			(314	)			(261	)			(312	)			(5	)			(71	)

	Total amount recognized		$	(3,225	)		$	(1,182	)		$	2,183			$	1,465			$	4,061			$	1,614

	Components of net periodic benefit cost:
	Service cost		$	295			$	236			$	276			$	207			$	275			$	227
	Interest cost			963				513				1,055				585				1,161				710
	Amortization of loss			387				314				262				312				5				69
	Expected return on plan assets			(1,348	)			—				(1,301	)			(180	)			(1,400	)			—
Special termination benefits			—				39				—				—				—				—
Amortization of prior service credit			—				(180	)			—				—				—				—

Net periodic benefit cost		$	297			$	922			$	292			$	924			$	41			$	1,006


Assumptions—Weighted-average assumptions used to determine the benefit obligations as of year-end 2013 and 2012 are:


		2013				2012
		Pension		Other		Pension		Other
		benefits		benefits		benefits		benefits
Discount rate		4.21% - 4.46%		4.33%		3.30% - 3.57%		3.41%
Expected long-term rate of return on plan assets		7.50%		N/A		7.50%		N/A
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 28, 2013, December 29, 2012 and December 31, 2011:


		2013				2012				2011
		Pension		Other		Pension		Other		Pension		Other
		benefits		benefits		benefits		benefits		benefits		benefits
Discount rate		3.30% - 3.57%		3.41%		3.89% - 4.07%		4.00%		4.94% - 5.12.%		5.07%
Expected long-term rate of return on plan assets		7.50%		N/A		7.50%		N/A		8.50%		N/A
The expected long-term return on plan assets is based upon the Plans’ consideration of historical and forward-looking returns and the Company’s estimation of what a portfolio, with the target allocation described below, will earn over a long-term horizon. The discount rate is derived using the Citigroup Pension Discount Curve.
Assumed health care cost trend rates are 9% grading to 7% and 9% grading to 7% as of year-end 2013 and 2012, respectively. Assumed health care cost trend rates have a significant effect on the amounts reported for the Company’s post retirement medical and life plans. A one percentage-point change in assumed health care cost trend rates would have the following effects as of year-end 2013 and 2012:


		2013								2012
		Increase				Decrease				Increase				Decrease
Total service cost and interest cost components		$	66			$	(55	)		$	73			$	(63	)
Estimated APBO			1,251				(1,073	)			1,555				(1,331	)
Plan Assets—The defined benefit pension plans’ (the “Plans”) investment strategy is to minimize investment risk while generating acceptable returns. The Plans currently invest a relatively high proportion of the plan assets in fixed income securities, while the remainder is invested in equity securities, cash reserves and precious metals. The equity securities are diversified into funds with growth and value investment strategies. The target allocation for plan assets is as follows: equity securities—30%; fixed income securities—63%; cash reserves—5%; and precious metals—2%. The Plans’ current investment allocations are within the tolerance of the target allocation. The Company had no Level 3 investments as of or for the years ended December 28, 2013 and December 29, 2012.
At year-end 2013 and 2012, the Plans’ assets were invested predominantly in fixed-income securities and publicly traded equities, but may invest in other asset classes in the future subject to the parameters of the investment policy. The Plans’ investments in fixed-income assets include U.S. Treasury and U.S. agency securities and corporate bonds. The Plans’ investments in equity assets include U.S. and international securities and equity funds. The Company estimates the fair value of the Plans’ assets using various valuation techniques and, to the extent available, quoted market prices in active markets or observable market inputs. The descriptions and fair value methodologies for the Plans’ assets are as follows:
Fixed Income Securities—Corporate and government bonds are classified as Level 2 assets, as they are either valued at quoted market prices from observable pricing sources at the reporting date or valued based upon comparable securities with similar yields and credit ratings.

Equity Securities—Equity securities are valued at the closing market price reported on a U.S. exchange where the security is actively traded and are therefore classified as Level 1 assets.
Cash—The carrying amounts of cash approximate fair value due to the short-term maturity.
Precious Metals—Precious metals are valued at the closing market price reported on a U.S. exchange where the security is actively traded and are therefore classified as Level 1 assets.
The fair value of the Company’s pension plans’ assets by asset class and fair value hierarchy level as of year-end 2013 and 2012 are as follows:


		2013
		Total fair				Quoted prices in active				Observable
		value				markets for identical				inputs (Level 2)
						assets (Level 1)
Fixed income securities:
Intermediate—government		$	1,647			$	—			$	1,647
Intermediate—corporate			3,138				—				3,138
Short-term—government			2,168				—				2,168
Short-term—corporate			4,040				—				4,040
Equity securities:
U.S. Large cap value			1,221				1,221				—
U.S. Large cap growth			1,536				1,536				—
U.S. Mid cap value			600				600				—
U.S. Mid cap growth			603				603				—
U.S. Small cap value			610				610				—
U.S. Small cap growth			599				599				—
International			889				889				—
Cash			1,665				1,665				—
Precious metals			358				358				—

Total		$	19,074			$	8,081			$	10,993



		2012
		Total				Quoted prices in active				Observable
		fair				markets for identical				inputs (Level 2)
		value				assets (Level 1)
Fixed income securities:
Intermediate—government		$	1,247			$	—			$	1,247
Intermediate—corporate			4,402				—				4,402
Short-term—government			2,038				—				2,038
Short-term—corporate			3,123				—				3,123
Equity securities:
U.S. Large cap value			1,063				1,063				—
U.S. Large cap growth			1,037				1,037				—
U.S. Mid cap value			542				542				—
U.S. Mid cap growth			536				536				—
U.S. Small cap value			546				546				—
U.S. Small cap growth			539				539				—
International			1,134				1,134				—
Cash			1,656				1,656				—

Total		$	17,863			$	7,053			$	10,810


Cash Flows—The Company expects to contribute approximately $1.0 million and $1.3 million in 2014 to its pension plans and other postretirement benefit plans, respectively.
The estimated benefit payments for each of the next five years and the five-year period thereafter are as follows:


		Pension				Other
		benefits				benefits
2014		$	1,694			$	1,269
2015			1,704				1,109
2016			1,739				1,130
2017			1,737				963
2018			1,774				1,018
2019 - 2023			8,667				4,512

Total		$	17,315			$	10,001

Continental Cement Company, L.L.C. [Member]	'
Employee Benefit Plans	'
	-8	Employee Benefit Plans
	Deferred Compensation Plan
	The Company sponsors an Employee 401(k) Savings Plan for all salaried employees and certain union employees. The plan provides for various required and discretionary Company matches of employees’ eligible compensation contributed to the plan and a discretionary profit sharing contribution as determined by the Company’s Board of Directors. The Company’s contributions to the plan were $0.5 million, $0.4 million and $0.3 million, for the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively.
	Defined Benefit Plans and Other Postretirement Benefits
	Continental Cement sponsors two noncontributory defined benefit pension plans for hourly and salaried employees. The salaried employee pension plan was closed to new participants and frozen in January 2000 and the hourly employee pension plan was closed to new participants in May 2003 and frozen in January 2014. Pension benefits for certain eligible hourly employees are based on a monthly pension factor for each year of credited service. Pension benefits for certain eligible salaried employees are generally based on years of service and average eligible compensation.
	Continental Cement also sponsors an unfunded healthcare and life insurance benefits plan for certain eligible retired employees. The retiree healthcare and life insurance plan was closed for salaried employees in January 2003 and hourly employees in July 2006. Effective January 1, 2012, the Company eliminated all future retiree health and life coverage for active salaried, nonunion hourly and certain union employees that retire on or after January 1, 2012. Effective January 1, 2014, the plan was amended to eliminate all future retiree health and life coverage for the remaining union employees.
	The funded status of the pension and other postretirement benefit plans is recognized in the consolidated balance sheets as the difference between the fair value of plan assets and the benefit obligations. For defined benefit pension plans, the benefit obligation is the projected benefit obligation (“PBO”) and for the other postretirement benefit plans the benefit obligation is the accumulated postretirement benefit obligation (“APBO”). The PBO represents the actuarial present value of benefits expected to be paid upon retirement based on estimated future compensation levels. However, since the plans’ participants are not subject to future compensation increases, the plans’ PBO equals the APBO. The APBO represents the actuarial present value of postretirement benefits attributed to employee services already rendered. The fair value of plan assets represents the current market value of assets held by an irrevocable trust fund for the sole benefit of participants. The measurement of the benefit obligation is based on Continental Cement’s estimates and actuarial valuations provided by third-party actuaries. These valuations reflect the terms of the plan and use participant-specific information such as compensation, age and years of service, as well as certain assumptions that require significant judgment, including estimates of discount rates, expected return on plan assets, rate of compensation increases, interest crediting rates and mortality rates.
	The Company uses its fiscal year-end as the measurement date for its defined benefit pension and other postretirement benefit plans.

	Obligations and Funded Status—The following information is as of year-end 2013 and 2012 and for the years ended December 28, 2013, December 31, 2012 and December 31, 2011:


			2013								2012
			Pension				Other				Pension				Other
			benefits				benefits				benefits				benefits
	Change in benefit obligations:
	Beginning of period		$	28,674			$	15,810			$	26,514			$	14,467
	Service cost			295				236				276				207
	Interest cost			963				513				1,055				585
	Actuarial (gain) loss			(2,674	)			(1,048	)			2,347				1,597
	Special termination benefits			—				39				—				—
	Benefits paid			(1,614	)			(1,395	)			(1,518	)			(1,046	)

	End of period			25,644				14,155				28,674				15,810

	Change in fair value of plan assets:
	Beginning of period			17,863				—				16,639				—
	Actual return on plan assets			1,512				—				1,205				—
	Employer contributions			1,313				1,395				1,537				1,046
	Benefits paid			(1,614	)			(1,395	)			(1,518	)			(1,046	)

	End of period			19,074				—				17,863				—

	Funded status of plans		$	(6,570	)		$	(14,155	)		$	(10,811	)		$	(15,810	)

	Current liabilities		$	—			$	(1,268	)		$	—			$	(1,055	)
	Noncurrent liabilities			(6,570	)			(12,887	)			(10,811	)			(14,755	)

	Liability recognized		$	(6,570	)		$	(14,155	)		$	(10,811	)		$	(15,810	)

	Amounts recognized in accumulated other comprehensive income:
	Net actuarial loss		$	4,831			$	4,139			$	8,056			$	5,501
	Prior service cost			—				(1,346	)			—				(1,526	)

	Total amount recognized		$	4,831			$	2,793			$	8,056			$	3,975

	The amount recognized in accumulated other comprehensive income (“AOCI”) is the actuarial loss, which has not yet been recognized in periodic benefit cost. At December 28, 2013, the actuarial loss expected to be amortized from AOCI to periodic benefit cost in 2014 is $0.1 million and $0.2 million for the pension and postretirement obligations, respectively.


			2013								2012								2011
			Pension				Other				Pension				Other				Pension				Other
			benefits				benefits				benefits				benefits				benefits				benefits
	Amounts recognized in other comprehensive (gain) loss:
	Net actuarial (gain) loss		$	(2,838	)		$	(1,048	)		$	2,444			$	1,597			$	4,066			$	3,390
	Prior service cost			—				180				—				—				—				(1,705	)
	Amortization of prior year service cost			—				—				—				180				—				—
	Amortization of (gain) loss			(387	)			(314	)			(261	)			(312	)			(5	)			(71	)

	Total amount recognized		$	(3,225	)		$	(1,182	)		$	2,183			$	1,465			$	4,061			$	1,614

	Components of net periodic benefit cost:
	Service cost		$	295			$	236			$	276			$	207			$	275			$	227
	Interest cost			963				513				1,055				585				1,161				710
Amortization of loss			387				314				262				312				5				69
Expected return on plan assets			(1,348	)			—				(1,301	)			(180	)			(1,400	)			—
Special termination benefits			—				39				—				—				—				—
Amortization of Prior Service Credit			—				(180	)			—				—				—				—

Net periodic benefit cost		$	297			$	922			$	292			$	924			$	41			$	1,006


Assumptions—Weighted-average assumptions used to determine the benefit obligations as of year-end 2013 and 2012 are:


		2013				2012
		Pension		Other		Pension		Other
		benefits		benefits		benefits		benefits
Discount rate		4.21% - 4.46%		4.33%		3.30% - 3.57%		3.41%
Expected long-term rate of return on plan assets		7.50%		N/A		7.50%		N/A
Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 28, 2013, December 31, 2012 and December 31, 2011:


		2013				2012				2011
		Pension		Other		Pension		Other		Pension		Other
		benefits		benefits		benefits		benefits		benefits		benefits
Discount rate		3.30% - 3.57%		3.41%		3.89% - 4.07%		4.00%		4.94% - 5.12.%		5.07%
Expected long-term rate of return on plan assets		7.50%		N/A		7.50%		N/A		8.50%		N/A
The expected long-term return on plan assets is based upon the plans’ consideration of historical and forward-looking returns and the Company’s estimation of what a portfolio, with the target allocation described below, will earn over a long-term horizon. The discount rate is derived using the Citigroup Pension Discount Curve.
Assumed health care cost trend rates are 9% grading to 7% and 9% grading to 7% as of year end 2013 and 2012, respectively. Assumed health care cost trend rates have a significant effect on the amounts reported for the Company’s post-retirement medical and life plans. A one percentage-point change in assumed health care cost trend rates would have the following effects as of year-end 2013 and 2012:


		2013								2012
		Increase				Decrease				Increase				Decrease
Total service cost and interest cost components		$	66			$	(55	)		$	73			$	(63	)
Estimated APBO			1,251				(1,073	)			1,555				(1,331	)
Plan Assets—The defined benefit pension plans’ (the “Plans”) investment strategy is to minimize investment risk while generating acceptable returns. The Plans currently invest a relatively high proportion of their assets in fixed income securities, while the remainder is invested in equity securities, cash reserves and precious metals. The equity securities are diversified into funds with growth and value investment strategies. The target allocation for plan assets is as follows: equity securities—30%; fixed income securities—63%; cash reserves—5%; and precious metals—2%. The Plans’ current investment allocations are within the tolerance of the target allocation.
Fair value determinations are based on the following hierarchy, which prioritizes the inputs used to measure fair value:

	•		Level 1—Quoted prices in active markets for identical assets and liabilities

	•		Level 2—Observable inputs, other than quoted prices, for similar assets or liabilities in active markets

	•		Level 3—Unobservable inputs, which includes the use of valuation models
The Company had no Level 3 investments as of or during the years ended December 28, 2013 and December 31, 2012. At year-end 2013 and 2012, the Plans’ assets were invested predominantly in publicly traded fixed-income securities and equities, but may invest in other asset classes in the future subject to the parameters of the investment policy. The Plans’ investments in fixed-income assets include U.S. Treasury and U.S. agency securities and corporate bonds. The Plans’ investments in equities include
U.S. and international securities and equity funds. The Company estimates the fair value of the Plans’ assets using various valuation techniques and, to the extent available, quoted market prices in active markets or observable market inputs. The descriptions and fair value methodologies for the Plans’ assets are as follows:
Fixed Income Securities—Corporate and government bonds are classified as Level 2 assets, as they are either valued at quoted market prices from observable pricing sources at the reporting date or valued based upon comparable securities with similar yields and credit ratings.
Equity Securities—Equity securities are valued at the closing market price reported on a U.S. exchange where the security is actively traded and are therefore classified as Level 1 assets.
Cash—The carrying amounts of cash approximate fair value due to the short-term maturity.
Precious Metals—Precious metals are valued at the closing market price reported on a U.S. exchange where the security is actively traded and are therefore classified as Level 1 assets.
The fair value of the Company’s pension plans’ assets by asset class and fair value hierarchy level as of year-end 2013 and 2012 are as follows:


		2013
		Total fair				Quoted prices in active				Observable
		value				markets for identical				inputs (Level 2)
						assets (Level 1)
Fixed income securities:
Intermediate—government		$	1,647			$	—			$	1,647
Intermediate—corporate			3,138				—				3,138
Short-term—government			2,168				—				2,168
Short-term—corporate			4,040				—				4,040
Equity securities:
U.S. Large cap value			1,221				1,221				—
U.S. Large cap growth			1,536				1,536				—
U.S. Mid cap value			600				600				—
U.S. Mid cap growth			603				603				—
U.S. Small cap value			610				610				—
U.S. Small cap growth			599				599				—
International			889				889				—
Cash			1,665				1,665				—
Precious metals			358				358				—

Total		$	19,074			$	8,081			$	10,993



		2012
		Total				Quoted prices in active				Observable
		fair				markets for identical				inputs (Level 2)
		value				assets (Level 1)
Fixed income securities:
Intermediate—government		$	1,247			$	—			$	1,247
Intermediate—corporate			4,402				—				4,402
Short-term—government			2,038				—				2,038
Short-term—corporate			3,123				—				3,123
Equity securities:
U.S. Large cap value			1,063				1,063				—
U.S. Large cap growth			1,037				1,037				—
U.S. Mid cap value			542				542				—
U.S. Mid cap growth			536				536				—
U.S. Small cap value			546				546				—
U.S. Small cap growth			539				539				—
International			1,134				1,134				—
Cash			1,656				1,656				—

Total		$	17,863			$	7,053			$	10,810

Cash Flows—The Company expects to contribute approximately $1.0 million to its pension plans and $1.3 million to its other postretirement benefit plans in 2014.
The estimated benefit payments for each of the next five years and the five-year period thereafter are as follows:


		Pension				Other
		benefits				benefits
2014		$	1,694			$	1,269
2015			1,704				1,109
2016			1,739				1,130
2017			1,737				963
2018			1,774				1,018
2019 - 2023			8,667				4,512

Total		$	17,315			$	10,001

Accrued_Mining_and_Landfill_Re

Accrued Mining and Landfill Reclamation	12 Months Ended
Accrued Mining and Landfill Reclamation	Dec. 28, 2013
Asset Retirement Obligation Disclosure [Abstract]	'
Accrued Mining and Landfill Reclamation	'
	(12) Accrued Mining and Landfill Reclamation
	The Company has asset retirement obligations arising from regulatory requirements to perform certain reclamation activities at the time that certain quarries and landfills are closed, which are primarily included in other noncurrent liabilities on the consolidated balance sheets. The current portion of the liabilities, $0.5 million and $0.4 million as of December 28, 2013 and December 29, 2012, respectively, is included in accrued and other liabilities on the consolidated balance sheets. The liability was initially measured at fair value and subsequently is adjusted for accretion expense, payments and changes in the amount or timing of the estimated cash flows. The corresponding asset retirement costs are capitalized as part of the carrying amount of the related long-lived asset and depreciated over the asset’s remaining useful life. The following table presents the activity for the asset retirement obligations for the years ended December 28, 2013 and December 29, 2012:


		2013			2012
	Beginning balance	$	14,844		$	13,328
	Acquired obligations		286			364
	Change in cost estimate		721			604
	Settlement of reclamation obligations		(1,201	)		(77	)
	Additional liabilities incurred		414			—
	Accretion expense		717			625

	Ending balance	$	15,781		$	14,844

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended		12 Months Ended
	Jun. 28, 2014		Dec. 28, 2013
Commitments and Contingencies	'		'
	9	COMMITMENTS AND CONTINGENCIES	(13) 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 in accordance with applicable accounting requirements. 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’s policy is to record legal fees as incurred.		Litigation and Claims—Summit Materials is party to certain legal actions arising from the ordinary course of business activities. In the opinion of management, these actions are without merit or the ultimate disposition, if any, resulting from them will not have a material effect on Summit Materials’ consolidated financial position, results of operations or liquidity. Summit Materials’ policy is to record legal fees as incurred.
	Litigation and Claims—The Company is obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ ownership interests in a joint venture agreement. The Company has the rights to any benefits under the joint venture as well as the assumption of any obligations, but does not own equity interests in the joint venture. The joint venture incurred significant losses on a highway project in Utah, which resulted in requests for funding from the joint venture partners and, ultimately, from the Company. Through June 28, 2014, the Company has funded $8.8 million, of which $4.0 million was funded in 2012 and $4.8 million was funded in 2011. As of June 28, 2014 and December 28, 2013, an accrual of $4.3 million was recorded in other noncurrent liabilities for this matter.		The Company is obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Excavating, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ ownership interests in a joint venture agreement. Summit Materials has the rights to any benefits under the joint venture as well as the assumption of any obligations, but does not own equity interests in the joint venture. The joint venture has incurred significant losses on a highway project in Utah, which have resulted in requests for funding from the joint venture partners and ultimately from the Company. Through year-end 2013, the Company has funded $8.8 million, $4.0 million in 2012 and $4.8 million in 2011. In 2012 and 2011, the Company recognized losses on the indemnification agreement of $8.0 million and $1.9 million, respectively, which are included in general and administrative expenses. As of year-end 2013 and 2012, an accrual of $4.3 million was recorded in other noncurrent liabilities as management’s best estimate of future funding obligations.
	During the course of business, there may be revisions to project costs and conditions that can give rise to change orders on construction contracts. Revisions can also result in claims made against a customer or subcontractor to recover project variances that have not been satisfactorily addressed through change orders with a customer. As of June 28, 2014 and December 28, 2013, unapproved change orders and claims totaled $4.0 million ($0.5 million in costs and estimated earnings in excess of billings, $1.2 million in accounts receivable and $2.3 million in other assets) and $3.2 million ($0.5 million in costs and estimated earnings in excess of billings and $2.7 million in other assets), respectively.		In February 2011, the Company incurred a property loss related to a sunken barge with cement product aboard. In the year-ended December 28, 2013, the Company recognized $0.8 million of charges for lost product aboard the barge and costs to remove the barge from the waterway. As of December 28, 2013 and December 29, 2012, $0.9 million is included in accrued expenses as management’s best estimate of the remaining costs to remove the barge.
			Environmental Remediation—Summit Materials’ mining operations are subject to and affected by federal, state 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. Summit Materials 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 Summit Materials’ business, as it is with other companies engaged in similar businesses and there can be no assurance that environmental liabilities will not have a material adverse effect on Summit Materials’ consolidated financial position, results of operations or liquidity.
	Environmental Remediation—The Company’s operations are subject to and affected by federal, state 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. Management 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 will not have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity in the future.		Other—During the course of business, there may be revisions to project costs and conditions that can give rise to change orders. Revisions can also result in claims we might make against the customer or a subcontractor to recover project variances that have not been satisfactorily addressed through change orders with the customer. As of year-end 2013 and 2012, unapproved change orders and claims were $3.2 million ($0.5 million in costs and estimated earnings in excess of billings and $2.7 million in other assets) and $4.8 million ($1.6 million in costs and estimated earnings in excess of billings and $3.2 million in other assets), respectively.
	Other—In February 2011, the Company incurred a property loss related to a sunken barge with cement product aboard. During the six months ended June 29, 2013, the Company recorded a $1.8 million charge for costs to remove the barge from the waterway. As of June 28, 2014 and December 28, 2013, the Company had $0.4 million and $0.9 million, respectively, included in accrued expenses as management’s best estimate of the remaining costs to remove the barge.		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 position, results of operations, and cash flows of the Company. The terms of the purchase commitments are generally less than one year.
	In the ordinary course of business, the Company enters into various firm purchase commitments with terms generally less than one year for certain raw materials and services. 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 position, results of operations or liquidity of the Company.
Continental Cement Company, L.L.C. [Member]	'		'
Commitments and Contingencies	'		'
	-6	Commitments and Contingencies	-9	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 in accordance with applicable accounting requirements. 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’s policy is to record legal fees as incurred.		Litigation and Claims
	Litigation and Claims—In February 2011, the Company incurred a property loss related to a sunken barge with cement product aboard. During the six months ended June 29, 2013, the Company recognized a $1.8 million charge for costs to remove the barge from the waterway. As of June 28, 2014 and December 28, 2013, the Company had $0.4 million and $0.9 million, respectively, included in accrued expenses as management’s best estimate of the remaining costs to remove the barge.		Continental Cement is party to certain legal actions arising from the ordinary course of business activities. In the opinion of management, these actions are without merit or that the ultimate disposition, if any, resulting from them will not have a material effect on Continental Cement’s consolidated financial position, results of operations or liquidity. Continental Cement’s policy is to record legal fees as incurred.
	Environmental Remediation—The Company’s operations are subject to and affected by federal, state 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 will not have a material adverse effect on the Company’s financial position, results of operations or liquidity in the future.		In February 2011, Continental Cement incurred a property loss related to a sunken barge with cement product aboard. As of December 28, 2013 and December 31, 2012, the Company had a $0.9 million accrual for the estimated remaining costs to remove the barge.
	Other—The Company is obligated under various firm purchase commitments for certain raw materials and services that are in the ordinary course of business. The terms of the purchase commitments are generally less than one year. 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 position, results of operations or liquidity of the Company.		Environmental Remediation
	As of both June 28, 2014 and December 28, 2013 approximately 62% of the Company’s employees were represented by labor organizations under collective bargaining agreements. The Company’s collective bargaining agreements for such employees generally expire between 2015 and 2018.		Continental Cement’s manufacturing operations are subject to and affected by Federal, state 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. Continental Cement 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 Continental Cement’s business, as it is with other companies engaged in similar businesses and there can be no assurance that environmental liabilities will not have a material adverse effect on Continental Cement in the future.
			Other
			Continental Cement 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 position, results of operations, and cash flows of Continental Cement. The terms of the purchase commitments are generally less than one year.
			As of December 28, 2013, approximately 62% of the Company’s employees were represented by labor organizations under collective bargaining agreements. The Company’s collective bargaining agreements for such employees generally expire between 2013 and 2015. The contract that expired in 2013 contract was successfully renegotiated and ratified in December 2013 and is expected to be finalized in the first quarter of 2014 with a term that will extend through 2018.

RELATED_PARTY_TRANSACTIONS

RELATED PARTY TRANSACTIONS	6 Months Ended		12 Months Ended
	Jun. 28, 2014		Dec. 28, 2013
Related Party Transactions	'		'
	12	RELATED PARTY TRANSACTIONS	(14) Related-Party Transactions
			The Company incurred management fees paid to Blackstone Management Partners L.L.C. (“BMP”) totaling $2.6 million, $2.1 million and $3.0 million in 2013, 2012 and 2011, respectively, under terms of an agreement dated July 30, 2009, between Parent and BMP. Under the terms of the agreement, BMP is permitted to, and has, assigned a portion of the fees to which it is entitled to receive to Silverhawk Summit, L.P. and to certain members of management. The fees were paid for consultancy services related to acquisition activities and are included in general and administrative expenses.
	The Company incurred certain management fees due to Blackstone Management Partners L.L.C. (“BMP”) totaling $2.3 million and $1.2 million during the six months ended June 28, 2014 and June 29, 2013, respectively. Under the terms of an agreement with Summit Materials Holdings L.P. and BMP, BMP provides monitoring, advisory and consulting services to the Company. In consideration for these services, the Company pays BMP the greater of $300,000 or 2.0% of the Company’s annual consolidated profit, as defined in the agreement. The management fees paid pursuant to this agreement are included in general and administrative expenses.		The Company purchased equipment from a noncontrolling member of Continental Cement for approximately $2.3 million, inclusive of $0.1 million of interest, in 2011, which was paid for in 2012.
			Summit Materials earned revenue of $0.6 million, $7.9 million and $8.6 million and incurred costs of $0.2 million, $0.2 million and $0.7 million in connection with several transactions with unconsolidated affiliates for the years ended December 28, 2013, December 29, 2012 and December 31, 2011, respectively. As of December 28, 2013 and December 29, 2012, accounts receivable from affiliates was $0.4 million and $1.9 million, respectively, and accounts payable to affiliates was zero and $0.2 million, respectively.
	BMP also undertakes financial and structural analysis, due diligence investigations, corporate strategy and other advisory services and negotiation assistance related to acquisitions, for which the Company pays BMP a transaction fee equal to 1.0% of the aggregate enterprise value of any acquired entity or, if such transaction is structured as an asset purchase or sale, 1.0% of the consideration paid for or received in respect of the assets acquired or disposed. Under the terms of the agreement, BMP is permitted to assign, and has assigned, a portion of the fees to which it is entitled to Silverhawk Summit, L.P. and to certain other equity-holding current and former employees and board members. During the six months ended June 28, 2014, the Company paid BMP $2.3 million under this agreement and paid immaterial amounts to Silverhawk Summit, L.P. and to other equityholders. The acquisition-related fees paid pursuant to this agreement are included in transaction costs.
			Cement sales to companies owned by certain noncontrolling members of Continental Cement were approximately $12.7 million, $12.5 million and $9.5 million for the years ended December 28, 2013, December 29, 2012 and December 2011, respectively, and accounts receivable due from these parties were approximately $0.2 million and $1.0 million as of December 28, 2013 and December 29, 2012, respectively.
	Blackstone Advisory Partners L.P., an affiliate of The Blackstone Group L.P., served as an initial purchaser of $13.0 million principal amount of the Additional Notes issued in January 2014 and received compensation in connection therewith.		As of year-end 2013 and 2012, the Company had accrued interest payments of $0.7 million and $2.1 million, respectively, due to a certain noncontrolling member for a related-party note, which is expected to be paid in 2014. The principal balance on the note was repaid as part of the January 2012 financing transactions.

	In addition to the fees paid to BMP pursuant to the agreements described above, the Company reimburses BMP for direct expenses incurred, which were not material in the three and six month periods ended June 28, 2014 and June 29, 2013.

	The Company had an immaterial amount and $0.4 million of revenue from unconsolidated affiliates during the six month periods ended June 28, 2014 and June 29, 2013, respectively. As of June 28, 2014 and December 28, 2013, accounts receivable from affiliates was zero and $0.4 million, respectively.

	Cement sales to companies owned by a noncontrolling member of Continental Cement were approximately $6.2 million and $5.1 million during the six month periods ended June 28, 2014 and June 29, 2013, respectively. Accounts receivables due from the noncontrolling member were $1.2 million and $0.2 million as of June 28, 2014 and December 28, 2013, respectively. In addition, as of December 28, 2013, the Company had accrued interest payments of $0.7 million due to a certain noncontrolling member for a related party note, which the Company paid in the first quarter of 2014. The principal balance on the note was repaid in January 2012.

	In the six months ended June 28, 2014, the Company sold certain assets associated with the production of concrete blocks, including inventory and equipment, to a related party for $2.3 million.
Continental Cement Company, L.L.C. [Member]	'		'
Related Party Transactions	'		'
	-7	Related Party Transactions	-10	Related-Party Transactions
	As of December 28, 2013, the Company had accrued interest payments of $0.7 million due to a certain noncontrolling member for a related party note, which was paid in the first quarter of 2014. The principal balance on the note was repaid in January 2012.		The Company purchased equipment from a certain noncontrolling member for approximately $2.3 million in 2011, which was paid for in 2012.
	Cement sales to companies owned by a certain noncontrolling member of Continental Cement were approximately $6.2 million and $5.1 million in the six months ended June 28, 2014 and June 29, 2013, respectively, and accounts receivables due from this party was approximately $1.2 million and $0.2 million as of June 28, 2014 and December 28, 2013, respectively.		As of year-end 2013 and 2012, the Company had accrued interest payments of $0.7 million and $2.1 million, respectively, due to a certain noncontrolling member for a related-party note, which is expected to be paid in 2014. The principal balance on the note was repaid in January 2012.
	Cement sales to companies owned by Summit Materials were approximately $1.9 million in both of the six month periods ended June 28, 2014 and June 29, 2013. Accounts receivables due from these parties were approximately $0.5 million and $0.2 million as of June 28, 2014 and December 28, 2013, respectively.		Cement sales to companies owned by certain noncontrolling members of Continental Cement were approximately $12.7 million, $12.5 million and $9.5 million during the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively, and accounts receivables due from these parties were approximately $0.2 million and $1.0 million as of December 28, 2013 and December 31, 2012, respectively.
			Cement sales to subsidiaries of Summit Materials were approximately $4.5 million, $3.8 million and $2.8 million for the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively, and accounts receivable due from these parties were approximately $0.2 million as of December 28, 2013 and December 31, 2012.
			Waste fuel sales by Continental Cement to American Environmental Services, Inc., which owned a noncontrolling interest in GAR until the Company purchased its interest in 2011, were approximately $0.7 million in the year ended December 31, 2011. After the Company purchased American Environmental Services, Inc.’s interest in GAR, American Environmental Services, Inc. ceased to be a related party.

AcquisitionRelated_Liabilities

Acquisition-Related Liabilities	12 Months Ended
Acquisition-Related Liabilities	Dec. 28, 2013
Business Combinations [Abstract]	'
Acquisition-Related Liabilities	'
	(15) Acquisition-Related Liabilities
	A number of acquisition-related liabilities have been recorded subject to terms in the relevant purchase agreements. There are three main categories of such obligations, deferred consideration, noncompete payments and earn-out obligations. Noncompete payments have been accrued where certain former owners of newly acquired companies have entered into standard noncompete arrangements. Subject to terms and conditions stated in these noncompete agreements, payments are generally made over a five-year period. Deferred consideration is purchase price consideration paid in the future as agreed to in the purchase agreement and is not contingent on future events. Deferred consideration is scheduled to be paid in years ranging from 5 to 20 years in either monthly, quarterly or annual installments. The remaining payments due under these noncompete and deferred consideration agreements are as follows:


	2014	$	10,790
	2015		6,742
	2016		5,950
	2017		5,910
	2018		5,370
	Thereafter		9,963

	Total scheduled payments		44,725
	Present value adjustments		(12,242	)

	Total noncompete obligations and deferred consideration	$	32,483

	Accretion on the deferred consideration and noncompete obligations is recorded in interest expense.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	6 Months Ended						12 Months Ended
Supplemental Cash Flow Information	Jun. 28, 2014						Dec. 28, 2013
Supplemental Cash Flow Information	'						'
	10	SUPPLEMENTAL CASH FLOW INFORMATION					(16) Supplemental Cash Flow Information
	Supplemental cash flow information is as follows:						Supplemental cash flow information for the years ended December 28, 2013, December 29, 2012 and December 31, 2011 is as follows:


			Six months ended						2013		2012			2011
			June 28,		June 29,		Cash payments:
			2014		2013		Interest		$	52,001	$	36,357		$	41,790
	Cash payments:						Income taxes			457		799			5,608
	Interest		$	25,881	$	31,439
	Income taxes			1,320		653
Continental Cement Company, L.L.C. [Member]	'						'
Supplemental Cash Flow Information	'						'
							-11	Supplemental Cash Flow Information
							Supplemental cash flow information is as follows for the years ended December 28, 2013, December 31, 2012 and December 31, 2011:


									2013		2012			2011
							Cash paid for interest		$	11,488	$	7,353		$	12,946
							Non cash financing activities:
							Proceeds on borrowings due to Summit Materials		$	—	$	156,842		$	—
							Repayment by Summit Materials of long-term debt and accrued interest			—		(156,842	)		—

Leasing_Arrangements

Leasing Arrangements	12 Months Ended
Leasing Arrangements	Dec. 28, 2013
Leasing Arrangements	'
	(17) Leasing Arrangements
	Rent expense, including short-term rentals, during the years ended December 28, 2013, December 29, 2012 and December 31, 2011 was $4.0 million, $3.5 million and $4.3 million, respectively. The Company has lease agreements associated with quarry facilities under which royalty payments are made. The payments are generally based on tons sold in a particular period; however, certain agreements have minimum annual payments. Royalty expense recorded in cost of revenue during the years ended December 28, 2013, December 29, 2012 and December 31, 2011 was $4.5 million, $3.9 million and $3.1 million, respectively. Minimum contractual commitments under long-term operating leases, which primarily relate to land, plant and equipment and under royalty agreements as of December 28, 2013, are as follows:


			Operating		Royalty
			Leases		Agreements
	2014		$	4,034	$	2,044
	2015			3,890		2,065
	2016			3,098		1,974
	2017			2,376		2,047
	2018			1,983		1,434
Continental Cement Company, L.L.C. [Member]	'
Leasing Arrangements	'
	-12	Leasing Arrangements
	Rent expense incurred, including short term rentals, primarily related to land and equipment, was $0.4 million, $0.5 million and $0.4 million for the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively.
	Minimum rental commitments under long-term operating leases as of December 28, 2013, are as follows:


	2014		$	378
	2015			341
	2016			325
	2017			291
	2018			291

Redeemable_Noncontrolling_Inte

Redeemable Noncontrolling Interest	12 Months Ended
Redeemable Noncontrolling Interest	Dec. 28, 2013
Noncontrolling Interest [Abstract]	'
Redeemable Noncontrolling Interest	'
	(18) Redeemable Noncontrolling Interest
	The Company owns 100 Class A Units of Continental Cement, which represent an approximately 70% economic interest and have a preference in liquidation to the Class B Units. Continental Cement issued 100,000,000 Class B Units in May 2010, which remain outstanding and represent an approximately 30% economic interest.
	Continental Cement’s Class A Units include a cumulative distribution preference which requires, to the extent distributions are authorized by its Board of Directors, Continental Cement Class A Units receive, prior to any distributions to the Class B Unit holders, a priority return of 11% accruing daily and compounding annually on each anniversary of the date of issuance to Class A Unit holders. To the extent the priority return is not made in a given year, the amount of the priority return will increase the liquidation preference of the Class A Units up to an 80% allowable sharing percentage in distributions and liquidation proceeds. The Company holds all the Class A Units. No distributions are currently anticipated.
	The Continental Cement Amended and Restated Limited Liability Company Agreement (as amended, the “LLC Agreement”) provides Summit Materials with a call option that allows the Company to call the Class B Units held by the owners of Continental Cement prior to Summit Materials’ purchase of the Class A Units (“Rollover Members”), at a strike price that approximates fair value, on the earlier of May 2016 or upon a change of control of Summit Materials. The Rollover Members have a put option that allows them to put the Class B Units to Summit Materials, at a strike price that approximates fair value, exercisable on the date that Summit Materials affects an initial public offering, upon a change of control of the Summit Materials Class A Units, or after May 2016. Finally, the LLC Agreement includes transfer restrictions which prohibit the Rollover Members from transferring their Class B Units without the consent of the Board of Continental Cement.
	Because the Class B Units can be put to Continental Cement by the Rollover Members in the future based on the passage of time, which can be accelerated upon the occurrence of a contingent event, Summit Materials’ noncontrolling interest is classified in temporary equity. The redemption value is based upon the estimated fair value of Continental Cement, which is valued using Level 3 inputs. Summit Materials elected to accrete changes in the redemption value of the noncontrolling interest over the period from the date of issuance to the earliest anticipated redemption date of the instrument, which is currently May 2016, using an interest method. The accretion is as an adjustment to the consolidated accumulated deficit. The redemption value of the redeemable noncontrolling interest as of year-end 2013 and 2012 approximated its carrying value.

Employee_Long_Term_Incentive_P

Employee Long Term Incentive Plan	12 Months Ended
Employee Long Term Incentive Plan	Dec. 28, 2013
Contractors [Abstract]	'
Employee Long Term Incentive Plan	'
	(19) Employee Long Term Incentive Plan
	Certain employees of the Company hold Class D unit interests in Parent that provide rights to cash distributions based on a predetermined distribution formula upon the general partner of Parent declaring a distribution.
	Certain of the Class D units vest with the passage of time (time-vesting interests) and the remaining vest when certain investment returns are achieved by the investors of Parent (performance-vesting interests). Of the time-vesting-interests, 20% vest on the first anniversary and the remaining 80% vest monthly over a period of four years following the first anniversary date. Units that are not vested in accordance with their terms within eight years are automatically forfeited without consideration.
	If the employee leaves the Company, the Company can (1) purchase the vested Class D units for a lump sum payment provided certain conditions have been met or (2) elect to convert all of the employee’s Class D units into a right to receive future distributions capped at a termination amount. The termination amount is determined as an amount equal to the fair market value of the Class D unit holder’s vested interests minus any amounts already distributed to the Class D unit holders respective of those Class D units plus interest on the difference between such fair market value and amounts already distributed. The fair value of the time-vesting Class D units granted in 2013, 2012 and 2011 totaled $1.6 million, $1.1 million and $3.4 million, respectively. The weighted-average grant-date fair value in 2013, 2012 and 2011 was $2,786, $3,761 and $3,876, respectively. The following table summarizes information for the Class D unit interests:


		Time-vesting Interests					Performance-vesting
		Time-vesting Interests					Interests
		Number of			Weighted		Number of			Weighted
		units			average grant-		units			average grant-
					date fair value					date fair value
					per unit					per unit
	Beginning balance—December 29, 2012		1,692		$	3,864		4,202		$	3,087
	Granted		584			2,786		759			2,314
	Vested		(772	)		3,896		—			—
	Forfeited		(2	)		3,893		(5	)		3,176
	Cancelled		(61	)		2,208		(79	)		1,388

	Balance—December 28, 2013		1,441					4,877

	The estimated fair value at December 28, 2013 of shares vested during 2013 was $2.2 million. As of year-end 2013 and 2012, the cumulative amount of units vested total 2,531 and 1,732, respectively. The fair value of the Class D units is estimated as of the grant date using Monte Carlo simulations, which requires the input of subjective assumptions, including the expected volatility and the expected term. The following table presents the weighted average assumptions used to estimate the fair value of grants in 2013, 2012 and 2011:


		2013		2012	2011
	Class D Units
	Risk-free interest rate	0.50%		1.62%	1.71% - 2.39%
	Dividend yield	None		None	None
	Volatility	58%		47%	42% - 49%
	Expected term	4 years		6 - 8 years	6 - 8 years
	The risk-free rate is based on the yield at the date of grant of a U.S. Treasury security with a maturity period approximating the expected term. As the Company has no plans to issue regular dividends, a dividend yield of zero was used. The volatility assumption is based on reported data of a peer group of publically traded companies for which historical information was available adjusted for the Company’s capital structure. The expected term is based on expectations about future exercises and represents the period of time that the units granted are expected to be outstanding.
	Compensation expense for time-vesting interest granted is based on the grant-date fair value. The Company recognizes these compensation costs on a straight-line basis over the service period, which is generally the vesting period of the award. A forfeiture rate assumption is factored into the compensation cost based on historical forfeitures. Compensation expense for performance-vesting interests would be recognized based on the grant date fair value. However, no compensation expense has been recognized for the performance-vesting interests, as management does not believe it is currently probable that certain investment returns, the performance criteria, will be achieved.

	Share-based compensation expense, which is recognized in general and administrative expenses, totaled $2.3 million, $2.5 million and $2.5 million in the years ended December 28, 2013, December 29, 2012 and December 31, 2011, respectively. As of December 28, 2013, unrecognized compensation cost totaled $4.6 million. The weighted average remaining contractual term over which the unrecognized compensation cost is to be recognized is 2.6 years as of year-end 2013.

Segment_Information

Segment Information	6 Months Ended									12 Months Ended
Segment Information	Jun. 28, 2014									Dec. 28, 2013
Segment Reporting [Abstract]	'									'
Segment Information	'									'
	11	SEGMENT INFORMATION								(20) Segment Information
	The Company has determined that it has three operating segments, which are its reportable segments: the West; Central; and East regions. These segments are consistent with the Company’s management reporting structure. Each region’s operations consist of various activities related to the production, distribution and sale of construction materials, products and the provision of construction services. Assets employed by 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 preparing the consolidated financial statements. The following tables display selected financial data for the Company’s reportable segments:									The Company has determined that it has three operating segments, which are its reportable segments: Central; West; and East regions. These segments are consistent with the Company’s management reporting structure. The operating results of each segment are regularly reviewed and evaluated separately by the Chief Executive Officer, the Company’s Chief Operating Decision Maker (“CODM”). The CODM primarily evaluates the performance of its segments and allocates resources to them based on segment profit, which is computed as earnings from continuing operations before interest, taxes, depreciation, depletion, amortization, accretion and goodwill impairment. In addition, certain items such as management fees are excluded from the calculation of segment profit.
										Each region has several acquired subsidiaries that are engaged in various activities including quarry mining, aggregate production and contracting. Assets employed by 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 for the following fiscal years:
			Six months ended
			June 28,				June 29,
			2014				2013					2013				2012				2011
	Revenue:									Revenue:
	West region		$	267,130			$	179,719		Central region		$	329,621			$	302,113			$	264,008
	Central region			156,659				128,680		West region			426,195				484,922				362,577
	East region			51,597				53,272		East region			160,385				139,219				162,491

	Total revenue		$	475,386			$	361,671		Total revenue		$	916,201			$	926,254			$	789,076



			Six months ended									2013				2012				2011
			June 28,				June 29,			Segment profit (loss):
			2014				2013			Central region		$	72,918			$	65,767			$	65,651
	Segment profit:									West region			28,607				14,429				36,442
	West region		$	32,541			$	85		East region			15,134				10,782				15,504
	Central region			28,400				19,182		Corporate and other (1)			(24,878	)			(15,560	)			(9,877	)
	East region			(1,406	)			(2,377	)
	Corporate and other			(19,046	)			(12,272	)	Total reportable segments and corporate			91,781				75,418				107,720
										Interest expense			56,443				58,079				47,784
	Total reportable segments and corporate			40,489				4,618		Depreciation, depletion, amortization and accretion			72,934				68,290				61,377
	Interest expense			40,470				27,849		Goodwill impairment			68,202				—				—
	Depreciation, depletion, amortization and accretion			40,695				36,026
										Loss from continuing operations before taxes		$	(105,798	)		$	(50,951	)		$	(1,441	)
	Income (loss) from continuing operations before taxes		$	(40,676	)		$	(59,257	)

										-1	Corporate results primarily consist of compensation and office expenses for employees included in the Company’s headquarters and transactions costs.

			Six months ended
			June 28,				June 29,					2013				2012				2011
			2014				2013			Cash paid for capital expenditures:
	Cash paid for capital expenditures:									Central region		$	33,030			$	20,996			$	20,078
	West region		$	17,924			$	14,194		West region			21,856				14,993				9,256
	Central region			23,372				19,826		East region			7,753				8,736				9,311
	East region			5,533				5,742
										Total reportable segments			62,639				44,725				38,645
	Total reportable segments			46,829				39,762		Corporate and other			3,360				763				11
	Corporate and other			2,431				766
										Total capital expenditures		$	65,999			$	45,488			$	38,656
	Total capital expenditures		$	49,260			$	40,528



			Six months ended									2013				2012				2011
			June 28,				June 29,			Depreciation, depletion, amortization and accretion:
			2014				2013			Central region		$	33,808			$	30,215			$	27,646
	Depreciation, depletion, amortization and accretion:									West region			24,167				23,771				19,706
	West region		$	14,414			$	12,291		East region			14,493				14,223				13,938
	Central region			18,351				16,329
	East region			7,288				7,362		Total reportable segments			72,468				68,209				61,290
										Corporate and other			466				81				87
	Total reportable segments			40,053				35,982
	Corporate and other			642				44		Total depreciation, depletion, amortization and accretion		$	72,934			$	68,290			$	61,377

	Total depreciation, depletion, amortization and accretion		$	40,695			$	36,026


												2013				2012				2011
		June 28,				December 28,			Total assets:
		2014				2013			Central region		$	657,421			$	610,003			$	587,341
Total assets:									West region			383,544				428,115				451,017
West region		$	659,071			$	383,544		East region			192,486				224,603				238,018
Central region			694,582				657,421
East region			235,835				192,486		Total reportable segments			1,233,451				1,262,721				1,276,376
									Corporate and other			14,343				18,492				7,889
Total reportable segments			1,589,488				1,233,451
Corporate and other			28,152				14,343		Total assets		$	1,247,794			$	1,281,213			$	1,284,265

Total		$	1,617,640			$	1,247,794


											2013				2012				2011
		Six months ended							Revenue by product:*
		June 28,				June 29,			Aggregates		$	159,019			$	146,991			$	116,082
		2014				2013			Cement			76,211				77,676				69,664
Revenue by product:*									Ready-mixed concrete			112,878				100,941				94,302
Aggregates		$	91,365			$	68,304		Asphalt			219,811				242,458				182,952
Cement			33,387				30,914		Construction and paving			478,280				505,189				464,866
Ready-mixed concrete			113,769				46,412		Other			(129,998	)			(147,001	)			(138,790	)
Asphalt			99,082				75,208
Paving and related services			199,420				171,946		Total revenue		$	916,201			$	926,254			$	789,076
Other			(61,637	)			(31,113	)

Total revenue		$	475,386			$	361,671		*	Revenue by product includes intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other.


	*	Revenue by product includes intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other.

SENIOR_NOTES_GUARANTOR_AND_NON

SENIOR NOTES' GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	6 Months Ended																						12 Months Ended
	Jun. 28, 2014																						Dec. 28, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'																						'
SENIOR NOTES' GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	'																						'
																							(21) Senior Notes’ Guarantor and Non-Guarantor Financial Information
																							The Company’s 100 percent-owned subsidiary companies (“Wholly-owned Guarantors”) and Continental Cement (“Non Wholly-owned Guarantor”), are named as guarantors (collectively, the “Guarantors”) of the Senior Notes. Other partially-owned subsidiaries do not guarantee the Senior Notes (collectively, the “Non-Guarantors”), including a subsidiary of Continental Cement. The Guarantors provide a joint and several, full and unconditional guarantee of the Senior Notes. There are no significant restrictions on the Company’s ability to obtain funds from any of the Guarantor Subsidiaries in the form of a dividend or loan. Additionally, there are no significant restrictions on a Guarantor Subsidiary’s ability to obtain funds from the Company or its direct or indirect subsidiaries.
	13	SENIOR NOTES’ GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION																					The following condensed consolidating balance sheets, statements of operations and cash flows are provided for Summit Materials (referred to as “Parent” in the condensed financial statements below), the Non-Wholly-owned Guarantor, the Wholly-owned Guarantors and the Non-Guarantors. Summit Materials Finance Corp. as a co-issuer of the Senior Notes, had no transactions during the respective periods or assets as of December 28, 2013 and December 29, 2012. 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 results of operations, cash flows or financial position had the guarantor or non-guarantor subsidiaries operated as independent entities.

	Summit Materials’ wholly-owned subsidiary companies other than Finance Corp. (“Wholly-owned Guarantors”) and non wholly-owned subsidiary, Continental Cement (“Non Wholly-owned Guarantor”), are named as guarantors (collectively, the “Guarantors”) of the Senior Notes. Certain other partially-owned subsidiaries, including a subsidiary of Continental Cement, do not guarantee the Senior Notes (collectively, the “Non-Guarantors”). Summit Materials (“Parent”) and Finance Corp. (collectively, the “Issuers”) were co-issuers of the Senior Notes. The Guarantors provide a joint and several, full and unconditional guarantee of the Senior Notes. There are no significant restrictions on Summit Materials 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 Materials or its direct or indirect subsidiaries.																						Condensed Consolidating Balance Sheets
																							December 28, 2013
	The following condensed consolidating balance sheets, statements of operations and cash flows are provided for the Issuers, the Non-Wholly-owned Guarantor, 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 results of operations, cash flows or financial position had the guarantor or non-guarantor subsidiaries operated as independent entities.

																									Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
																									Materials,			Wholly-			owned			Guarantors
	Condensed Consolidating Balance Sheets																								LLC			owned			Guarantors
																									(Parent)			Guarantor
	June 28, 2014																						Assets
																							Current assets:
																							Cash		$	10,375		$	9		$	3,442		$	3,631		$	(2,540	)		$	14,917
																							Accounts receivable, net			—			4,587			93,102			3,100			(1,452	)			99,337
			Issuers				Non-Wholly-owned			Wholly-			Non-			Elim-				Consol-			Intercompany receivables			38,134			3,433			30,787			—			(72,354	)			—
							Guarantor			owned			Guarantors			inations				idated			Cost and estimated earnings in excess of billings			—			—			10,539			228			—				10,767
										Guarantors													Inventories			—			10,402			85,372			658			—				96,432
	Assets																						Other current assets			750			444			11,715			272			—				13,181

	Current assets:																						Total current assets			49,259			18,875			234,957			7,889			(76,346	)			234,634
	Cash		$	21,685			$	7		$	2,681		$	4,723		$	(8,294	)		$	20,802		Property, plant and equipment, net			3,969			301,908			518,935			6,966			—				831,778
	Accounts receivable, net			—				12,338			128,876			4,922			(2,368	)			143,768		Goodwill			—			23,124			102,942			972			—				127,038
	Intercompany receivables			264,955				—			33,532			—			(298,487	)			—		Intangible assets, net			—			642			14,505			—			—				15,147
	Cost and estimated earnings in excess of billings			—				—			21,018			761			—				21,779		Other assets			296,494			17,973			37,535			1,303			(314,108	)			39,197
	Inventories			—				14,569			102,293			2,309			—				119,171
	Other current assets			2,791				722			9,645			375			(298	)			13,235		Total assets		$	349,722		$	362,522		$	908,874		$	17,130		$	(390,454	)		$	1,247,794

	Total current assets			289,431				27,636			298,045			13,090			(309,447	)			318,755		Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
	Property, plant and equipment, net			5,755				305,274			602,744			6,740			—				920,513		Current liabilities:
	Goodwill			—				23,124			293,227			972			—				317,323		Current portion of debt		$	26,010		$	1,018		$	3,192		$	—		$	—			$	30,220
	Intangible assets, net			—				592			14,683			—			—				15,275		Current portion of acquisition-related liabilities			2,000			—			8,635			—			—				10,635
	Other assets			499,692				20,378			63,234			1,235			(538,765	)			45,774		Accounts payable			5,455			9,387			57,142			1,572			(1,452	)			72,104
																							Accrued expenses			12,041			9,185			37,342			1,223			(2,540	)			57,251
	Total assets		$	794,878			$	377,004		$	1,271,933		$	22,037		$	(848,212	)		$	1,617,640		Intercompany payables			—			—			71,556			798			(72,354	)			—
																							Billings in excess of costs and estimated earnings			—			—			8,837			426			—				9,263

	Liabilities, Redeemable Noncontrolling Interest and Member’s Interest																						Total current liabilities			45,506			19,590			186,704			4,019			(76,346	)			179,473
																							Long-term debt			19,587			154,590			484,590			—			—				658,767
	Current liabilities:																						Acquisition-related liabilities			85			—			23,671			—			—				23,756
	Current portion of debt		$	69,220			$	1,018		$	3,192		$	—		$	(4,210	)		$	69,220		Other noncurrent liabilities			959			20,306			56,215			—			—				77,480
	Current portion of acquisition-related liabilities			1,141				—			17,898			—			—				19,039
	Accounts payable			4,517				7,978			64,426			3,691			(2,368	)			78,244		Total liabilities			66,137			194,486			751,180			4,019			(76,346	)			939,476
	Accrued expenses			25,566				7,691			62,068			1,180			(8,592	)			87,913		Redeemable noncontrolling interest			—			—			—			—			24,767				24,767
	Intercompany payables			101,411				21,810			174,376			890			(298,487	)			—		Redeemable members’ interest			—			23,450			—			—			(23,450	)			—
	Billings in excess of costs and estimated earnings			—				—			4,877			25			—				4,902		Total member’s interest			283,585			144,586			157,694			13,111			(315,425	)			283,551

	Total current liabilities			201,855				38,497			326,837			5,786			(313,657	)			259,318		Total liabilities, redeemable noncontrolling interest and member’s interest		$	349,722		$	362,522		$	908,874		$	17,130		$	(390,454	)		$	1,247,794
	Long-term debt			938,290				154,081			482,993			—			(637,074	)			938,290
	Acquisition-related liabilities			—				—			40,947			—			—				40,947
	Other noncurrent liabilities			879				17,570			64,966			—			—				83,415		Condensed Consolidating Balance Sheets
																							December 29, 2012
	Total liabilities			1,141,024				210,148			915,743			5,786			(950,731	)			1,321,970
	Redeemable noncontrolling interest			—				—			—			—			26,825				26,825
	Redeemable members’ interest			—				23,750			—			—			(23,750	)			—				Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
	Total member’s interest			(346,146	)			143,106			356,190			16,251			99,444				268,845				Materials,			Wholly-			owned			Guarantors
																									LLC			owned			Guarantors
	Total liabilities, redeemable noncontrolling interest and member’s interest		$	794,878			$	377,004		$	1,271,933		$	22,037		$	(848,212	)		$	1,617,640				(Parent)			Guarantor
																							Assets
																							Current assets:
																							Cash		$	697		$	397		$	30,981		$	680		$	(5,324	)		$	27,431
																							Accounts receivable, net			—			7,421			90,765			3,255			(1,143	)			100,298
Condensed Consolidating Balance Sheets																						Intercompany receivables			14,931			15,557			9,018			—			(39,506	)			—
																						Cost and estimated earnings in excess of billings			—			—			11,428			147			—				11,575
December 28, 2013																						Inventories			—			7,073			84,555			1,349			—				92,977
																						Other current assets			25			726			8,447			2,409			(1,539	)			10,068

																						Total current assets			15,653			31,174			235,194			7,840			(47,512	)			242,349
		Issuers				Non-Wholly-owned			Wholly-			Non-			Elim-				Consol-			Property, plant and equipment, net			1,074			287,677			517,994			6,862			—				813,607
						Guarantor			owned			Guarantors			inations				idated			Goodwill			—			23,124			155,024			972			—				179,120
									Guarantors													Intangible assets, net			—			742			7,864			—			—				8,606
Assets																						Other assets			374,581			11,891			161,442			1,315			(511,698	)			37,531

Current assets:																						Total assets		$	391,308		$	354,608		$	1,077,518		$	16,989		$	(559,210	)		$	1,281,213
Cash		$	10,375			$	9		$	3,442		$	3,631		$	(2,540	)		$	14,917
Accounts receivable, net			—				4,587			93,102			3,100			(1,452	)			99,337		Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Intercompany receivables			38,134				3,433			30,787			—			(72,354	)			—		Current liabilities:
Cost and estimated earnings in excess of billings			—				—			10,539			228			—				10,767		Current portion of debt		$	—		$	965		$	3,035		$	—		$	—			$	4,000
Inventories			—				10,402			85,372			658			—				96,432		Current portion of acquisition-related liabilities			—			—			9,525			—			—				9,525
Other current assets			750				444			11,715			272			—				13,181		Accounts payable			2,745			6,715			51,179			2,138			(1,143	)			61,634
																						Accrued expenses			6,877			10,742			38,050			1,015			(6,862	)			49,822
Total current assets			49,259				18,875			234,957			7,889			(76,346	)			234,634		Intercompany payables			—			—			33,396			6,110			(39,506	)			—
Property, plant and equipment, net			3,969				301,908			518,935			6,966			—				831,778		Billings in excess of costs and estimated earnings			—			—			6,656			270			—				6,926
Goodwill			—				23,124			102,942			972			—				127,038
Intangible assets, net			—				642			14,505			—			—				15,147		Total current liabilities			9,622			18,422			141,841			9,533			(47,511	)			131,907
Other assets			296,494				17,973			37,535			1,303			(314,108	)			39,197		Long-term debt			—			155,394			480,449			—			—				635,843
																						Acquisition-related liabilities			—			—			23,919			—			—				23,919
Total assets		$	349,722			$	362,522		$	908,874		$	17,130		$	(390,454	)		$	1,247,794		Other noncurrent liabilities			395			27,091			56,780			—			—				84,266

																						Total liabilities			10,017			200,907			702,989			9,533			(47,511	)			875,935
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest																						Redeemable noncontrolling interest			—			—			—			—			22,850				22,850
																						Redeemable members’ interest			—			22,850			—			—			(22,850	)			—
Current liabilities:																						Total member’s interest			381,291			130,851			374,529			7,456			(511,699	)			382,428
Current portion of debt		$	26,010			$	1,018		$	3,192		$	—		$	—			$	30,220
Current portion of acquisition-related liabilities			2,000				—			8,635			—			—				10,635		Total liabilities, redeemable noncontrolling interest and member’s interest		$	391,308		$	354,608		$	1,077,518		$	16,989		$	(559,210	)		$	1,281,213
Accounts payable			5,455				9,387			57,142			1,572			(1,452	)			72,104
Accrued expenses			12,041				9,185			37,342			1,223			(2,540	)			57,251
Intercompany payables			—				—			71,556			798			(72,354	)			—		Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Billings in excess of costs and estimated earnings			—				—			8,837			426			—				9,263		Year ended December 28, 2013

Total current liabilities			45,506				19,590			186,704			4,019			(76,346	)			179,473
Long-term debt			19,587				154,590			484,590			—			—				658,767				Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
Acquisition-related liabilities			85				—			23,671			—			—				23,756				Materials			Wholly-			owned			Guarantors
Other noncurrent liabilities			959				20,306			56,215			—			—				77,480				LLC			owned			Guarantors
																								(Parent)			Guarantor
Total liabilities			66,137				194,486			751,180			4,019			(76,346	)			939,476		Total revenue		$	—		$	80,759		$	807,921		$	41,910		$	(14,389	)		$	916,201
Redeemable noncontrolling interest			—				—			—			—			24,767				24,767
Redeemable members’ interest			—				23,450			—			—			(23,450	)			—		Cost of revenue (excluding items shown separately below)			—			55,241			611,799			24,401			(14,389	)			677,052
Total member’s interest			283,585				144,586			157,694			13,111			(315,425	)			283,551		General and administrative expenses			7,241			7,673			125,778			1,308			—				142,000
																						Goodwill impairment			—			—			68,202			—			—				68,202
Total liabilities, redeemable noncontrolling interest and member’s interest		$	349,722			$	362,522		$	908,874		$	17,130		$	(390,454	)		$	1,247,794		Depreciation, depletion, amortization and accretion			465			11,378			60,078			1,013			—				72,934
																						Transaction costs			—			—			3,990			—			—				3,990

																						Operating (loss) income			(7,706	)		6,467			(61,926	)		15,188			—				(47,977	)
																						Other expense (income), net			99,085			(3,737	)		(3,410	)		274			(90,834	)			1,378
Condensed Consolidating Statements of Operations																						Interest expense			—			10,702			49,591			382			(4,232	)			56,443

For the six months ended June 28, 2014																						(Loss) income from continuing operations before taxes			(106,791	)		(498	)		(108,107	)		14,532			95,066				(105,798	)
																						Income tax expense			—			—			(2,647	)		—			—				(2,647	)

																						(Loss) income from continuing operations			(106,791	)		(498	)		(105,460	)		14,532			95,066				(103,151	)
		Issuers				Non-Wholly-owned			Wholly-			Non-			Elim-				Consol-			Loss from discontinued operations			—			—			528			—			—				528
						Guarantor			owned			Guarantors			inations				idated
									Guarantors													Net (loss) income			(106,791	)		(498	)		(105,988	)		14,532			95,066				(103,679	)
Revenue		$	—			$	35,264		$	427,717		$	21,274		$	(8,869	)		$	475,386		Net income attributable to noncontrolling interest			—			—			—			—			3,112				3,112

																						Net (loss) income attributable to member of Summit Materials, LLC		$	(106,791	)	$	(498	)	$	(105,988	)	$	14,532		$	91,954			$	(106,791	)
Cost of revenue (excluding items shown separately below)			—				27,626			328,318			13,362			(8,869	)			360,437
General and administrative expenses			17,690				3,574			53,521			566			—				75,351		Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(106,791	)	$	3,909		$	(105,988	)	$	14,532		$	90,632			$	(103,706	)
Depreciation, depletion, amortization and accretion			642				6,777			32,731			545			—				40,695

Operating (loss) income			(18,332	)			(2,713	)		13,147			6,801			—				(1,097	)	Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Other expense (income), net			7,725				(1,358	)		(1,553	)		45			(5,750	)			(891	)	Year ended December 29, 2012
Interest expense			13,668				5,857			24,415			56			(3,526	)			40,470

(Loss) income from continuing operations before taxes			(39,725	)			(7,212	)		(9,715	)		6,700			9,276				(40,676	)			Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
Income tax benefit			(1,427	)			—			(33	)		—			—				(1,460	)			Materials			Wholly-			owned			Guarantors
																								LLC			owned			Guarantors
(Loss) income from continuing operations			(38,298	)			(7,212	)		(9,682	)		6,700			9,276				(39,216	)			(Parent)			Guarantor
Income from discontinued operations			—				—			(349	)		—			—				(349	)	Total revenue		$	—		$	81,516		$	824,796		$	33,074		$	(13,132	)		$	926,254

Net (loss) income			(38,298	)			(7,212	)		(9,333	)		6,700			9,276				(38,867	)	Cost of revenue (excluding items shown separately below)			—			58,319			649,577			18,582			(13,132	)			713,346
Net loss attributable to noncontrolling interest			—				—			—			—			(569	)			(569	)	General and administrative expenses			8			6,235			119,645			1,327			—				127,215
																						Depreciation, depletion, amortization and accretion			81			10,093			57,080			1,036			—				68,290
Net (loss) income attributable to member of Summit Materials, LLC		$	(38,298	)		$	(7,212	)	$	(9,333	)	$	6,700		$	9,845			$	(38,298	)	Transaction costs			—			—			1,988			—			—				1,988

Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(38,298	)		$	(6,394	)	$	(9,333	)	$	6,700		$	9,600			$	(37,725	)	Operating (loss) income			(89	)		6,869			(3,494	)		12,129			—				15,415
																						Other expense (income), net			52,400			(2,065	)		6,630			(101	)		(48,577	)			8,287
																						Interest expense			—			12,045			47,293			633			(1,892	)			58,079

																						(Loss) income from continuing operations before taxes			(52,489	)		(3,111	)		(57,417	)		11,597			50,469				(50,951	)
Condensed Consolidating Statements of Operations																						Income tax expense			5			—			(3,925	)		—			—				(3,920	)

For the six months ended June 29, 2013																						(Loss) income from continuing operations			(52,494	)		(3,111	)		(53,492	)		11,597			50,469				(47,031	)
																						Loss from discontinued operations			—			—			3,546			—			—				3,546

																						Net (loss) income			(52,494	)		(3,111	)		(57,038	)		11,597			50,469				(50,577	)
		Issuers				Non-Wholly-owned			Wholly-			Non-			Elim-				Consol-			Net income attributable to noncontrolling interest			—			—			—			—			1,919				1,919
						Guarantor			owned			Guarantors			inations				idated
									Guarantors													Net (loss) income attributable to member of Summit Materials, LLC		$	(52,494	)	$	(3,111	)	$	(57,038	)	$	11,597		$	48,550			$	(52,496	)
Revenue		$	—			$	32,799		$	314,895		$	20,486		$	(6,509	)		$	361,671
																						Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(52,494	)	$	(6,759	)	$	(57,038	)	$	11,597		$	49,645			$	(55,049	)

Cost of revenue (excluding items shown separately below)			—				27,833			243,357			13,235			(6,509	)			277,916
General and administrative expenses			2,896				5,083			67,296			584			—				75,859		Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Depreciation, depletion, amortization and accretion			44				5,532			29,938			512			—				36,026		Year ended December 31, 2011

Operating (loss) income			(2,940	)			(5,649	)		(25,696	)		6,155			—				(28,130	)
Other expense (income), net			51,549				(1,295	)		1,529			174			(48,679	)			3,278				Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
Interest expense			—				5,423			24,095			239			(1,908	)			27,849				Materials			Wholly-			owned			Guarantors
																								LLC			owned			Guarantors
(Loss) income from continuing operations before taxes			(54,489	)			(9,777	)		(51,320	)		5,742			50,587				(59,257	)			(Parent)			Guarantor
Income tax benefit			—				—			(3,347	)		—			—				(3,347	)	Total revenue		$	—		$	70,064		$	700,916		$	21,566		$	(3,470	)		$	789,076

(Loss) income from continuing operations			(54,489	)			(9,777	)		(47,973	)		5,742			50,587				(55,910	)	Cost of revenue (excluding items shown separately below)			—			41,221			542,699			17,204			(3,470	)			597,654
Loss from discontinued operations			—				—			97			—			—				97		General and administrative expenses			1,453			3,933			89,011			1,429			—				95,826
																						Depreciation, depletion, amortization and accretion			87			9,697			50,640			953			—				61,377
Net (loss) income			(54,489	)			(9,777	)		(48,070	)		5,742			50,587				(56,007	)	Transaction costs			—			—			9,120			—			—				9,120
Net loss attributable to noncontrolling interest			—				—			—			—			(1,518	)			(1,518	)
																						Operating (loss) income			(1,540	)		15,213			9,446			1,980			—				25,099
Net (loss) income attributable to member of Summit Materials, LLC		$	(54,489	)		$	(9,777	)	$	(48,070	)	$	5,742		$	52,105			$	(54,489	)	Other expense (income), net			8,510			(61	)		(24,375	)		124			(5,442	)			(21,244	)
																						Interest expense			—			14,004			33,685			647			(552	)			47,784

																						(Loss) income from continuing operations before taxes			(10,050	)		1,270			136			1,209			5,994				(1,441	)
																						Income tax expense			—			—			3,408			—			—				3,408
Condensed Consolidating Statements of Cash Flows
																						(Loss) income from continuing operations			(10,050	)		1,270			(3,272	)		1,209			5,994				(4,849	)
For the six months ended June 28, 2014																						Loss from discontinued operations			—			—			5,201			—			—				5,201

																						Net (loss) income			(10,050	)		1,270			(8,473	)		1,209			5,994				(10,050	)
																						Net income attributable to noncontrolling interest			695			—			695			—			(695	)			695
		Issuers				Non-Wholly-owned			Wholly-			Non-			Elim-				Consol-
						Guarantor			owned			Guarantors			inations				idated			Net (loss) income attributable to member of Summit Materials, LLC		$	(10,745	)	$	1,270		$	(9,168	)	$	1,209		$	6,689			$	(10,745	)
									Guarantors
Net cash (used in) provided by operating activities		$	(18,665	)		$	(13,153	)	$	(13,412	)	$	168		$	(818	)		$	(45,880	)	Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(9,375	)	$	(4,405	)	$	(13,473	)	$	1,209		$	10,994			$	(15,050	)


Cash flow from investing activities:																						Condensed Consolidating Statements of Cash Flows
Acquisitions, net of cash acquired			(181,754	)			—			(53,116	)		—			—				(234,870	)	Year ended December 28, 2013
Purchase of property, plant and equipment			(2,428	)			(11,829	)		(34,666	)		(337	)		—				(49,260	)
Proceeds from the sale of property, plant, and equipment			—				—			5,912			73			—				5,985
Other			—				—			(409	)		—			1,166				757				Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
																								Materials,			Wholly-			owned			Guarantors
Net cash used for investing activities			(184,182	)			(11,829	)		(82,279	)		(264	)		1,166				(277,388	)			LLC			owned			Guarantors
																								(Parent)			Guarantor
																						Net cash (used for) provided by operating activities		$	(232	)	$	9,003		$	44,746		$	12,895		$	—			$	66,412
Cash flow from financing activities:
Proceeds from investment by member			24,350				—			—			1,166			(1,166	)			24,350		Cash flow from investing activities:
Net proceeds from debt issuance			424,750				—			—			—			—				424,750		Acquisitions, net of cash acquired			—			—			(61,601	)		—			—				(61,601	)
Loans received from and payments made on loans from other Summit Companies			(123,441	)			25,234			104,121			22			(5,936	)			—		Purchase of property, plant and equipment			(3,359	)		(24,896	)		(36,629	)		(1,115	)		—				(65,999	)
Payments on long-term debt			(104,060	)			(254	)		(4,932	)		—			—				(109,246	)	Proceeds from the sale of property, plant, and equipment			—			3			16,020			62			—				16,085
Payments on acquisition-related liabilities			(1,000	)			—			(3,259	)		—			—				(4,259	)
Financing costs			(6,354	)			—			—			—			—				(6,354	)	Net cash used for investing activities			(3,359	)		(24,893	)		(82,210	)		(1,053	)		—				(111,515	)
Other			(88	)			—			(1,000	)		—			1,000				(88	)
																						Cash flow from financing activities
Net cash provided by (used for) financing activities			214,157				24,980			94,930			1,188			(6,102	)			329,153		Net proceeds from debt issuance			230,817			—			—			—			—				230,817
																						Loans received from and payments made on loans from other Summit Companies			(29,121	)		15,502			19,726			(8,891	)		2,784				—
																						Payments on long-term debt			(188,424	)		—			—			—			—				(188,424	)
Net increase (decrease) in cash			11,310				(2	)		(761	)		1,092			(5,754	)			5,885		Payments on acquisition-related liabilities			—			—			(9,801	)		—			—				(9,801	)
																						Other			(3	)		—			—			—			—				(3	)
Cash—Beginning of period			10,375				9			3,442			3,631			(2,540	)			14,917
																						Net cash provided by (used for) financing activities			13,269			15,502			9,925			(8,891	)		2,784				32,589
Cash—End of period		$	21,685			$	7		$	2,681		$	4,723		$	(8,294	)		$	20,802
																						Net decrease (increase) in cash			9,678			(388	)		(27,539	)		2,951			2,784				(12,514	)
																						Cash—Beginning of period			697			397			30,981			680			(5,324	)			27,431

																						Cash—End of period		$	10,375		$	9		$	3,442		$	3,631		$	(2,540	)		$	14,917
Condensed Consolidating Statements of Cash Flows

For the six months ended June 29, 2013																						Condensed Consolidating Statements of Cash Flows
																						Year ended December 29, 2012


		Issuers				Non-Wholly-owned			Wholly-			Non-			Elim-				Consol-					Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
						Guarantor			owned			Guarantors			inations				idated					Materials,			Wholly-			owned			Guarantors
									Guarantors															LLC			owned			Guarantors
Net cash (used in) provided by operating activities		$	(28	)		$	(12,542	)	$	(39,989	)	$	4,799		$	—			$	(47,760	)			(Parent)			Guarantor
																						Net cash provided by operating activities		$	4,845		$	12,806		$	36,649		$	8,217		$	(238	)		$	62,279

Cash flow from investing activities:																						Cash flow from investing activities:
Acquisitions, net of cash acquired			—				—			(60,779	)		—			—				(60,779	)	Acquisitions, net of cash acquired			—			—			(48,757	)		—			—				(48,757	)
Purchase of property, plant and equipment			(766	)			(15,214	)		(23,514	)		(1,034	)		—				(40,528	)	Purchase of property, plant and equipment			(762	)		(12,174	)		(31,818	)		(734	)		—				(45,488	)
Proceeds from the sale of property, plant, and equipment			—				—			7,086			—			—				7,086		Proceeds from the sale of property, plant, and equipment			—			69			8,577			190			—				8,836
																						Other			—			—			69			—			—				69
Net cash used for investing activities			(766	)			(15,214	)		(77,207	)		(1,034	)		—				(94,221	)
																						Net cash used for investing activities			(762	)		(12,105	)		(71,929	)		(544	)		—				(85,340	)

Cash flow from financing activities:																						Cash flow from financing activities
Net proceeds from debt issuance			189,681				—			—			—			—				189,681		Net proceeds from debt issuance			713,378			(17	)		—			—			—				713,361
Loans received from and payments made on loans from other Summit Companies			(124,587	)			27,367			100,970			(4,338	)		588				—		Loans received from and payments made on loans from other Summit Companies			(25,371	)		(295	)		39,783			(8,793	)		(5,324	)			—
Payments on long-term debt			(61,343	)			—			—			—			—				(61,343	)	Payments on long-term debt			(697,438	)		—			—			—			—				(697,438	)
Payments on acquisition-related liabilities			—				—			(3,426	)		—			—				(3,426	)	Payments on acquisition-related liabilities			—			—			(7,519	)		—			—				(7,519	)
Financing costs			(2,707	)			—			—			—			—				(2,707	)	Other			(656	)		—			—			(284	)		238				(702	)

Net cash provided by (used for) financing activities			1,044				27,367			97,544			(4,338	)		588				122,205		Net cash (used for) provided by financing activities			(10,087	)		(312	)		32,264			(9,077	)		(5,086	)			7,702

																						Net decrease (increase) in cash			(6,004	)		389			(3,016	)		(1,404	)		(5,324	)			(15,359	)
Net (decrease) increase in cash			250				(389	)		(19,652	)		(573	)		588				(19,776	)	Cash—Beginning of period			6,701			8			33,997			2,084			—				42,790

Cash—Beginning of period			697				397			30,981			680			(5,324	)			27,431		Cash—End of period		$	697		$	397		$	30,981		$	680		$	(5,324	)		$	27,431

Cash—End of period		$	947			$	8		$	11,329		$	107		$	(4,736	)		$	7,655
																						Condensed Consolidating Statements of Cash Flows
																						Year ended December 31, 2011


																								Summit			Non-			Wholly-			Non-			Eliminations				Consolidated
																								Materials,			Wholly-			owned			Guarantors
																								LLC			owned			Guarantors
																								(Parent)			Guarantor
																						Net cash provided by operating activities		$	(824	)	$	3,808		$	17,262		$	2,586		$	421			$	23,253

																						Cash flow from investing activities:
																						Acquisitions, net of cash acquired			—			—			(161,073	)		—			—				(161,073	)
																						Purchase of property, plant and equipment			(11	)		(5,933	)		(31,210	)		(1,502	)		—				(38,656	)
																						Proceeds from the sale of property, plant, and equipment			—			168			6,880			109			—				7,157
																						Proceeds from the sale of investments			—			—			377			(136	)		—				241
																						Cash contribution to affiliates			(135,530	)		—			—			—			135,530				—

																						Net cash used for investing activities			(135,541	)		(5,765	)		(185,026	)		(1,529	)		135,530				(192,331	)

																						Cash flow from financing activities
																						Proceeds from investment by member			103,630			—			135,530			421			(135,951	)			103,630
																						Net proceeds from debt issuance			—			36,456			60,292			—			—				96,748
																						Payments on long-term debt			—			(34,500	)		(14,500	)		—			—				(49,000	)
																						Payments on acquisition-related liabilities			—			—			(4,593	)		—			—				(4,593	)
																						Other			—			—			—			(10	)		—				(10	)

																						Net cash (used for) provided by financing activities			103,630			1,956			176,729			411			(135,951	)			146,775

																						Net decrease (increase) in cash			(32,735	)		(1	)		8,965			1,468			—				(22,303	)
																						Cash—Beginning of period			39,436			9			25,032			616			—				65,093

																						Cash—End of period		$	6,701		$	8		$	33,997		$	2,084		$	—			$	42,790

Supplementary_Data_Unaudited

Supplementary Data (Unaudited)	12 Months Ended
Supplementary Data (Unaudited)	Dec. 28, 2013
Supplementary Data (Unaudited)	'
	(22) Supplementary Data (Unaudited)
	Supplemental financial information (unaudited) by quarter is as follows for the years ended 2013 and 2012:


			2013											2012
			4Q			3Q		2Q			1Q			4Q			3Q		2Q			1Q
	Revenue		$	238,267		$	316,263	$	254,842		$	106,829		$	231,634		$	319,181	$	255,556		$	119,883
	Operating (loss) income			(57,742	)		37,895		13,731			(41,861	)		13,322			33,249		9,015			(40,171	)
	(Loss) income from continuing operations			(70,191	)		22,950		244			(56,154	)		433			19,656		(5,621	)		(61,499	)
	Loss (income) from discontinued operations			271			160		(26	)		123			535			1,287		2,221			(497	)
	Net (loss) income		$	(70,462	)	$	22,790	$	270		$	(56,277	)	$	(102	)	$	18,369	$	(7,842	)	$	(61,002	)
Continental Cement Company, L.L.C. [Member]	'
Supplementary Data (Unaudited)	'
	-13	Supplementary Data (Unaudited)
	Supplemental financial information (unaudited) by quarter is as follows for the years ended December 28, 2013 and December 31, 2012:


			2013											2012
	(in thousands)		4Q			3Q		2Q			1Q			4Q			3Q		2Q			1Q
	Revenues		$	22,509		$	34,155	$	27,224		$	12,361		$	25,304		$	30,430	$	26,141		$	13,007
	Operating income (loss)			9,259			10,965		9,053			(8,449	)		7,625			7,124		9,097			(4,468	)
	Net income (loss)		$	6,668		$	8,157	$	6,272		$	(11,232	)	$	4,694		$	3,977	$	5,999		$	(8,045	)

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 28, 2013
Subsequent Events	'
	(23) Subsequent Events
	On January 17, 2014, Summit Materials and Summit Materials Finance Corp. issued and sold $260.0 million aggregate principal amount of their 10.5% Senior Notes due 2020 (the “Additional Notes”), which mature on January 31, 2020, pursuant to an indenture governing the $250.0 million aggregate principal amount of 10.5% Senior Notes due 2020 that were issued on January 30, 2012 (the “Existing Notes”). The Additional Notes are treated as a single series with the Existing Notes and have substantially the same terms as those of the Existing Notes. The Additional Notes and the Existing Notes will vote as one class under the Indenture. In addition, on January 16, 2014, the Senior Secured Credit Agreement was amended to allow for the issuance of the Additional Notes.
	On January 17, 2014, the Company completed its acquisition of Alleyton Resource Corporation, a Texas corporation, and Colorado Gulf, LP, a Texas limited partnership, and certain real property from Barten Shepard Investments, LP, a Texas limited partnership (“BSI”), collectively, referred to as “Alleyton”, for approximately $179.25 million, with an additional $30.75 million in deferred and contingent payments. The Alleyton acquisition consideration was funded through a portion of the net proceeds from the issue and sale of the Additional Notes.
Continental Cement Company, L.L.C. [Member]	'
Subsequent Events	'
	-14	Subsequent Events
	On January 17, 2014, Summit Materials and Summit Materials Finance Corp. issued and sold an additional $260.0 million aggregate principal amount of their 10.5% Senior Notes due 2020, which mature on January 31, 2020, pursuant to an indenture which also governs the $250.0 million aggregate principal amount of 10.5% Senior Notes due 2020 that were issued on January 30, 2012. As a result, the Company’s guarantee of the Senior Notes increased by the additional $260.0 million of notes issued to $510.0 million.

Accrued_Expenses

Accrued Expenses	6 Months Ended						12 Months Ended
Accrued Expenses	Jun. 28, 2014						Dec. 28, 2013
Accrued Expenses	'						'
	6	ACCRUED EXPENSES
	Accrued expenses consist of the following as of June 28, 2014 and December 28, 2013:


			June 28,		December 28,
			2014		2013
	Interest		$	27,633	$	16,456
	Payroll and benefits			16,066		16,368
	Capital lease obligations			13,528		2,068
	Insurance			8,212		7,445
	Taxes (1)			6,084		4,168
	Professional fees			2,177		2,352
	Other (2)			14,213		8,394

	Total		$	87,913	$	57,251


		-1	Consists primarily of real estate, personal property and sales taxes.
		-2	Consists primarily of subcontractor, management fee and working capital settlement accruals.
Continental Cement Company, L.L.C. [Member]	'						'
Accrued Expenses	'						'
							-5	Accrued Expenses

	-4	Accrued Expenses					Accrued expenses and other liabilities consist of the following as of year-end 2013 and 2012:

	Accrued expenses consist of the following as of June 28, 2014 and December 28, 2013:

									2013		2012
							Accrued interest due to Summit Materials		$	3,848	$	4,283
			June 28, 2014		December 28, 2013		Accrued interest due to noncontrolling interest			723		2,149
	Accrued interest due to Summit Materials		$	3,806	$	3,848	Accrued post-retirement benefits other than pensions, current portion			1,268		1,055
	Accrued post-retirement benefits other than pensions, current portion			1,268		1,268	Accrued professional fees			340		400
	Accrued bonus liability			326		884	Accrued payroll, insurance and benefits			758		897
	Accrued payroll, insurance and benefits			793		758	Accrued bonus liability			884		1,153
	Accrued interest due to noncontrolling member			—		723	Accrued costs to remove barge from waterway			880		850
	Accrued professional fees			269		340	Other			1,296		736
	Accrued costs to remove barge from waterway			380		880
	Other			1,624		1,296	Total		$	9,997	$	11,523

	Total		$	8,466	$	9,997

LongTerm_Debt

Long-Term Debt (Continental Cement Company, L.L.C. [Member])	6 Months Ended		12 Months Ended
	Jun. 28, 2014		Dec. 28, 2013
Continental Cement Company, L.L.C. [Member]	'		'
Long-Term Debt	'		'
	-5	Long-Term Debt
	Long-term debt due to Summit Materials, including the current portion of long-term debt, was $155.1 million and $155.6 million as of June 28, 2014 and December 28, 2013, respectively. Interest costs incurred on the long-term debt were $5.6 million and $5.5 million in the six months ended June 28, 2014 and June 29, 2013, respectively. The interest rate in effect at June 28, 2014 was 3.7%.
	Continental Cement is named as a guarantor of Summit Materials’ debt, for which Continental Cement pledged substantially all of its assets as collateral. Continental Cement provides a joint and several, full and unconditional guarantee of borrowings under Summit Materials’ senior secured credit facilities (“Senior Secured Credit Facilities”). As of June 28, 2014 and December 28, 2013, Summit Materials’ debt included $510 million and $250 million, respectively, of senior notes due January 31, 2020 (“Senior Notes”) and borrowings under the Senior Secured Credit Facilities composed of $422.0 million in term loans that mature January 30, 2019 and a $150.0 million revolving credit facility that matures January 30, 2017.		-6	Long-Term Debt
	Summit Materials is and has been current on all required principal and interest payments. As of June 28, 2014, approximately $94.8 million and $60.3 million of the Company’s long-term debt due to Summit Materials represented the amount of Summit Materials’ debt that has been allocated to the Company under the Senior Secured Credit Facilities and Senior Notes, respectively, compared to $95.3 million and $60.3 million, respectively, as of December 28, 2013. The terms of Summit Materials’ debt limit certain transactions of its subsidiaries, including those of Continental Cement. Continental Cement’s ability to incur additional indebtedness or issue certain preferred shares, pay dividends to the noncontrolling members, 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 or enter into certain transactions with affiliates are limited by the terms of Summit Materials’ debt.
			Long-term debt, including the current portion of long-term debt, was $155.6 million and $156.4 million as of year-end 2013 and 2012, respectively. Interest costs incurred were $11.1 million, $12.6 million and $14.6 million for the years ended December 28, 2013, December 31, 2012 and December 31, 2011, respectively. The interest rate in effect at December 28, 2013 was 3.7%.

			On January 30, 2012, Summit Materials refinanced its consolidated outstanding indebtedness, including $142.7 million of the Company’s indebtedness and interest thereon, by issuing $250.0 million aggregate principal amount of 10.5% Senior Notes due January 31, 2020 (the “Senior Notes”) and borrowing under its senior secured credit facilities composed of $422.0 million in term loans as of December 28, 2013 that mature January 30, 2019 and a $150.0 million revolving credit facility that matures January 30, 2017 (the “Senior Secured Credit Facilities”). As a result of the January 2012 financing transactions, Continental Cement’s existing debt was repaid by Summit Materials and was replaced by $156.8 million of long-term debt due to Summit Materials. In addition, Continental Cement recognized a charge to earnings of $0.3 million related to financing fees on the debt repaid.

			The terms of Summit Materials’ debt limit certain transactions of its subsidiaries, including those of Continental Cement. Continental Cement’s ability to incur additional indebtedness or issue certain preferred shares, pay dividends to the noncontrolling members, 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 are limited.

			Continental Cement, excluding GAR, is named as a guarantor of Summit Materials’ debt, for which the Company pledged substantially all of its assets as collateral. Continental Cement, excluding GAR, provides a joint and several, full and unconditional guarantee of Summit Materials’ debt. Summit Materials is and has been current on all required principal and interest payments. As of December 28, 2013, approximately $95.3 million and $60.3 million of the Company’s long-term debt due to Summit Materials represent the amount of Summit Materials’ debt under the Senior Secured Credit Facilities and Senior Notes, respectively, that has been allocated to the Company.



			Future maturities of long-term debt due to Summit Materials as of December 28, 2013 are as follows:



			2014		$	1,018
			2015			1,018
			2016			1,273
			2017			1,018
			2018			764
			Thereafter			150,517

			Total		$	155,608

Members_Interest1

Members' Interest (Continental Cement Company, L.L.C. [Member])	12 Months Ended
	Dec. 28, 2013
Continental Cement Company, L.L.C. [Member]	'
Members' Interest	'
	-7	Members’ Interest
	Business affairs of the Company are managed by a board of directors (the “Board”) composed of up to seven Directors. As of December 28, 2013 and December 31, 2012, Summit Materials is entitled to appoint four directors to the Board and members representing the noncontrolling interest are entitled to appoint three directors to the Board. Any director may be removed from the Board with or without cause at any time by the directors entitled to appoint such Director.
	The LLC Agreement provides that resolutions of the Board generally require the consent of at least a majority of the Directors.
	The Company had 100 Class A Units issued and outstanding as of December 28, 2013 and December 31, 2012, all of which were indirectly held by Summit Materials. The Class A Units represent an approximately 70% economic interest in the Company and they have a preference in liquidation to the Class B Units. Class A Units are entitled to a priority distribution which accrues daily and compounds annually and requires that Continental Cement make distributions ahead of the Class B Units up to an amount equal to the capital contributions made by Summit Materials in respect to the Class A Units, plus interest on such capital contributions of 11%, to Class A Unit holders prior to making distributions to the Class B Unit holders. To the extent that the priority return is not made in a given year, the amount of the priority return will increase the liquidation preference of the Class A Units.
	The Company had 100,000,000 Class B Units issued and outstanding as of December 28, 2013 and December 31, 2012. The Class B Units represent an approximately 30% economic interest in the Company and are subordinate to the Class A Units.
	The LLC Agreement provides Summit Materials with the right to require the Company to call all of the Class B Units at a strike price that approximates fair value after May 27, 2016, either in anticipation of Summit Materials effecting an initial public offering or if an initial public offering has already occurred. In addition, subject to certain conditions, holders of the Class B Units have the right to require the Company to purchase all of the Class B Units at a strike price that approximates fair value, exercisable after May 27, 2012 if there is a change of control of Summit Materials or at any time after May 27, 2016. The LLC Agreement also includes transfer restrictions which prohibit the Class B Unit holders from transferring their Class B Units without the consent of the Board until May 27, 2015.
	Because the Class B Units can be put to the Company by the Class B Unit holders in the future based on the passage of time, which can be accelerated upon the occurrence of a contingent event, the noncontrolling members’ interest is classified in temporary equity. The redemption value is based upon the estimated fair value of Continental Cement, which is valued using Level 3 inputs. Continental Cement elected to accrete changes in the redemption value of the noncontrolling interest over the period from the date of issuance to the earliest anticipated redemption date of the instrument, which is currently May 2016, using an interest method. The accretion is recorded as an adjustment to retained earnings. The redemption value of the redeemable members’ interest as of year-end 2013 and 2012 approximated its carrying value.

	Net earnings or losses are generally allocated in a manner such that the capital account of each Member is equal to the distributions that would be made to such Member if the Company were dissolved, its affairs wound up, its assets and liabilities settled for cash and the net assets of the Company were distributed in accordance with the LLC Agreement.

Summary_of_Organization_and_Si1

Summary of Organization and Significant Accounting Policies (Policies)

6 Months Ended

12 Months Ended

Jun. 28, 2014

Dec. 28, 2013

Principles of Consolidation

Use of Estimates

Business and Credit Concentrations

Accounts Receivable

The balances billed but not paid by customers, pursuant to retainage provisions included in contracts, will be due upon completion of the contracts.

Revenue and Cost Recognition

Revenue from the receipt of waste fuels is classified as service revenue and is based on fees charged for the waste disposal, which are recognized when the waste is accepted.

Inventories

Property, Plant and Equipment, net

Upon disposal, the cost and related accumulated depreciation are removed from the Company’s accounts and any gain or loss is included in general and administrative expenses.

Buildings and improvements

7–40 years

Plant, machinery and equipment

3–40 years

Truck and auto fleet

3–10 years

Mobile equipment and barges

3–20 years

Landfill airspace and improvements

5–60 years

Accrued Mining and Landfill Reclamation

Intangible Assets

December 28, 2013

December 29, 2012

Gross

Accumulated

Net

Gross

Accumulated

Net

Carrying

Amortization

Carrying

Amortization

Carrying

Amount

Leases

10,430

(1,604

)

8,826

8,940

(1,092

)

7,848

Reserve rights

5,890

(221

)

5,669

—

Trade names

1,020

(368

)

652

1,020

(262

)

758

Total intangible assets

17,340

(2,193

)

15,147

9,960

(1,354

)

8,606

2014

897

2015

897

2016

897

2017

893

2018

893

Thereafter

10,670

Total

15,147

Goodwill

Income Taxes

Fair Value Measurements

Fair Value Measurements—The fair value accounting guidance establishes the following fair value hierarchy that prioritizes the inputs used to measure fair value:

Level 1

—

Unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2

—

Level 3

—

Valuations developed from unobservable data, reflecting the Company’s own assumptions, which market participants would use in pricing the asset or liability.

Assets and liabilities measured at fair value in the consolidated balance sheets as of year-end 2013 and 2012 are as follows:

2013

2012

Accrued expenses:

Current portion of contingent consideration

—

746

Acquisition- related liabilities

Contingent consideration

1,908

Financial Instruments

Financial Instruments—The Company’s financial instruments include certain acquisition-related liabilities (deferred consideration and noncompete obligations) and debt. The fair value of the deferred consideration and noncompete obligations approximate their carrying value of $28.3 million and $4.2 million, respectively, as of December 28, 2013 and $23.4 million and $7.4 million, respectively, as of December 29, 2012. The fair value was determined based on Level 3 inputs of the fair value hierarchy, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

Reclassifications

Reclassifications—Certain amounts have been reclassified in prior periods to conform to the presentation in the consolidated financial statements as of and for the year ended December 28, 2013.

Basis of Presentation

Redeemable Noncontrolling Interest

Continental Cement Company, L.L.C. [Member]

Principles of Consolidation

(b)

Principles of Consolidation

Use of Estimates

Use of Estimates—Preparation of these consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported and the disclosures about contingent assets and liabilities. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangible and other long-lived assets, pension and other postretirement obligations, asset retirement obligations and redeemable members’ interest. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, will be reflected in the Company’s consolidated financial statements for the period in which the change in estimate occurs.

(c)

Use of Estimates

Business and Credit Concentrations

(d)

Business and Credit Concentrations

Accounts Receivable

(e)

Accounts Receivable

Inventories

(g)

Inventories

Property, Plant and Equipment, net

(h)

Property, Plant and Equipment, net

Upon disposal, the cost and related accumulated depreciation are removed from the Company’s accounts and any gain or loss is included in operating income.

Depreciation on property, plant and equipment is computed on a straight-line basis. These estimated useful lives are as follows:

Building and improvements

30 – 40 years

Plant, machinery and equipment

3 – 40 years

Mobile equipment and barges

3 – 20 years

Other

3 – 7 years

Depletion of mineral reserves is calculated over proven and probable reserves by the units of production method on a site-by-site basis.

Goodwill

(j)

Goodwill

Income Taxes

(k)

Income Taxes

Reclassifications

(m)

Reclassifications

Certain amounts have been reclassified in prior periods to conform to the presentation in the consolidated financial statements as of and for the year ended December 28, 2013.

Basis of Presentation

Business Activities and Organization

(a)

Business Activities and Organization

Revenue Recognition

(f)

Revenue Recognition

Accrued Mining Reclamation

(i)

Accrued Mining Reclamation

Summary_of_Organization_and_Si2

Summary of Organization and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 28, 2013
Estimated Useful Lives of Assets	'
	The estimated useful lives are generally as follows:


	Buildings and improvements		7–40 years
	Plant, machinery and equipment		3–40 years
	Truck and auto fleet		3–10 years
	Mobile equipment and barges		3–20 years
	Landfill airspace and improvements		5–60 years
Intangible Assets by Type and in Total	'
	The following table shows intangible assets by type and in total:


		December 28, 2013							December 29, 2012
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Amount					Amount		Amount					Amount
	Leases	$	10,430	$	(1,604	)	$	8,826	$	8,940	$	(1,092	)	$	7,848
	Reserve rights		5,890		(221	)		5,669		—		—			—
	Trade names		1,020		(368	)		652		1,020		(262	)		758

	Total intangible assets	$	17,340	$	(2,193	)	$	15,147	$	9,960	$	(1,354	)	$	8,606

Estimated Amortization Expense for Intangible Assets	'
	The estimated amortization expense for intangible assets for each of the next five years and thereafter is as follows:


	2014	$	897
	2015		897
	2016		897
	2017		893
	2018		893
	Thereafter		10,670

	Total	$	15,147

Assets and Liabilities Measured at Fair Value	'
	Assets and liabilities measured at fair value in the consolidated balance sheets as of year-end 2013 and 2012 are as follows:


		2013		2012
	Accrued expenses:
	Current portion of contingent consideration	$	—	$	746
	Acquisition- related liabilities
	Contingent consideration	$	1,908	$	1,908
Continental Cement Company, L.L.C. [Member]	'
Estimated Useful Lives of Assets	'
	These estimated useful lives are as follows:


	Building and improvements		30 – 40 years
	Plant, machinery and equipment		3 – 40 years
	Mobile equipment and barges		3 – 20 years
	Other		3 – 7 years

ACQUISITIONS_Tables

ACQUISITIONS (Tables)	12 Months Ended
ACQUISITIONS (Tables)	Dec. 28, 2013
Business Combinations [Abstract]	'
Schedule of Supplemental Pro Forma Information of Acquisitions	'
	Pro Forma Financial Information—The following unaudited supplemental pro forma information presents the financial results as if the 2012 acquisitions occurred on January 1, 2011. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisitions been made on January 1, 2011, nor is it indicative of any future results. The 2013 acquisitions were not material individually or in the aggregate.


			Year ended
			December 28, 2013			December 29, 2012
	Revenue		$	916,201		$	976,797
	Net loss			(103,679	)		(45,976	)
Summary of Fair Value of Assets Acquired and Liabilities Assumed	'
	finalized. The following table summarizes aggregated information regarding the fair values of the assets acquired and liabilities assumed as of the respective acquisition dates in 2013 and 2012:


			2013			2012
	Financial assets		$	8,302		$	1,397
	Inventories			3,954			6,988
	Property, plant and equipment			40,580			21,543
	Other assets			52			1,330
	Intangible assets(1)			7,428			3,172
	Financial liabilities			(6,164	)		(944	)
	Other long-term liabilities			(1,050	)		(364	)

	Net assets acquired			53,102			33,122
	Goodwill			16,120			26,230

	Total purchase price			69,222			59,352

	Noncash transactions:
	Acquisition related liabilities			(7,902	)		(10,547	)
	Other			281			(48	)

	Total noncash transactions			(7,621	)		(10,595	)

	Net cash paid for acquisitions		$	61,601		$	48,757


	-1	Intangible assets acquired relate to aggregate reserves to which the Company has the rights of ownership, but do not own the reserves ($5.9 million) and the differential between contractual lease rates and market rates for leases of aggregate reserves and office space. The acquired intangible assets in total, the reserve rights and the lease assets have weighted-average lives of 18 years, 20 years and 11 years, respectively.

GOODWILL_Tables

GOODWILL (Tables)	6 Months Ended									12 Months Ended
GOODWILL (Tables)	Jun. 28, 2014									Dec. 28, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'									'
Changes in Carrying Amount of Goodwill, by Reportable Segment	'									'
	Changes in the carrying amount of goodwill, by reportable segment, from December 28, 2013 to June 28, 2014 are summarized as follows:									The following table presents goodwill by reportable segments and in total:


		West		Central		East		Total			Central		West			East			Total
	Balance, December 28, 2013	$	54,249	$	72,789	$	—	$	127,038	Beginning Balance- December 31, 2011	$	53,585	$	91,598		$	8,192		$	153,375
	Acquisitions		164,125		—		26,160		190,285	Acquisitions		19,204		(205	)		6,746			25,745

	Balance, June 28, 2014	$	218,374	$	72,789	$	26,160	$	317,323	Balance, December 29, 2012		72,789		91,393			14,938			179,120
										Acquisitions		—		16,120			—			16,120
										Impairment		—		(53,264	)		(14,938	)		(68,202	)

										Balance, December 28, 2013	$	72,789	$	54,249		$	—		$	127,038

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
Discontinued Operations (Tables)	Dec. 28, 2013
Discontinued Operations And Disposal Groups [Abstract]	'
Revenue and Loss before Income Tax Expense from Discontinued Operations	'
	The railroad, environmental remediation and concrete paving businesses’ revenue and loss before income tax expense, including an immaterial gain on sale, in fiscal years 2013, 2012 and 2011 are summarized below:


		2013		2012		2011
	Total revenue	$	3,884	$	50,152	$	49,537
	Loss from discontinued operations before income tax expense		528		3,546		5,201

ACCOUNTS_RECEIVABLE_NET_Tables

ACCOUNTS RECEIVABLE, NET (Tables)	6 Months Ended							12 Months Ended
ACCOUNTS RECEIVABLE, NET (Tables)	Jun. 28, 2014							Dec. 28, 2013
Summary of Accounts Receivable, Net	'							'
	Accounts receivable, net consisted of the following as of June 28, 2014 and December 28, 2013:							Accounts receivable, net consists of the following as of year-end 2013 and 2012:


		June 28,			December 28,				2013			2012
		2014			2013			Trade accounts receivable	$	85,188		$	88,637
	Trade accounts receivable	$	131,026		$	85,188		Retention receivables		15,966			13,181
	Retention receivables		14,185			15,966		Receivables from related parties		202			1,871
	Receivables from related parties		1,262			202
								Accounts receivable		101,356			103,689
	Accounts receivable		146,473			101,356		Less: Allowance for doubtful accounts		(2,019	)		(3,391	)
	Less: Allowance for doubtful accounts		(2,705	)		(2,019	)
								Accounts receivable, net	$	99,337		$	100,298
	Accounts receivable, net	$	143,768		$	99,337

Continental Cement Company, L.L.C. [Member]	'							'
Summary of Accounts Receivable, Net	'							'
	Accounts receivable, net consists of the following as of June 28, 2014 and December 28, 2013:							Accounts receivable, net consists of the following as of year-end 2013 and 2012:


		June 28, 2014			December 28, 2013				2013			2012
	Trade accounts receivable from unaffiliated entities	$	13,455		$	6,961		Trade accounts receivable from unaffiliated entities	$	6,961		$	8,859
	Trade accounts receivable from related parties		1,628			422		Trade accounts receivable from related parties		422			1,193

	Accounts receivable		15,083			7,383		Accounts receivable		7,383			10,052
	Less: allowance for doubtful accounts		(244	)		(30	)	Less: allowance for doubtful accounts		(30	)		(128	)

	Accounts receivable, net	$	14,839		$	7,353		Accounts receivable, net	$	7,353		$	9,924

Inventories_Tables

Inventories (Tables)	6 Months Ended					12 Months Ended
Inventories (Tables)	Jun. 28, 2014					Dec. 28, 2013
Components of Inventories	'					'
	Inventories consisted of the following as of June 28, 2014 and December 28, 2013:					Inventories consist of the following as of year-end 2013 and 2012:


		June 28,		December 28,			2013		2012
		2014		2013		Aggregate stockpiles	$	70,300	$	62,872
	Aggregate stockpiles	$	80,232	$	70,300	Finished goods		11,207		9,342
	Finished goods		14,104		11,207	Work in process		2,623		2,679
	Work in process		4,629		2,623	Raw materials		12,302		18,084
	Raw materials		20,206		12,302
						Total	$	96,432	$	92,977
	Total	$	119,171	$	96,432

Continental Cement Company, L.L.C. [Member]	'					'
Components of Inventories	'					'
	Inventories consist of the following as of June 28, 2014 and December 28, 2013:					Inventories consist of the following as of year-end 2013 and 2012:


		June 28, 2014		December 28, 2013			2013		2012
	Raw materials	$	972	$	972	Raw materials	$	972	$	475
	Work-in-process		4,629		2,623	Work-in-process		2,623		2,248
	Finished goods		8,968		6,807	Finished goods		6,807		4,350

	Total inventories	$	14,569	$	10,402	Total inventories	$	10,402	$	7,073

Property_Plant_and_Equipment_n1

Property, Plant and Equipment, net (Tables)	12 Months Ended
Property, Plant and Equipment, net (Tables)	Dec. 28, 2013
Components of Property, Plant and Equipment	'
	Property, plant and equipment, net consist of the following as of year-end 2013 and 2012:


		2013			2012
	Land (mineral bearing) and asset retirement costs	$	107,007		$	106,135
	Land (non-mineral bearing)		81,331			69,560
	Buildings and improvements		77,535			78,168
	Plants, machinery and equipment		680,942			623,949
	Truck and auto fleet		19,165			19,399
	Landfill airspace and improvements		46,841			46,841
	Construction in progress		29,560			20,734
	Other		1,779			5,134

	Property, plant and equipment		1,044,160			969,920
	Less accumulated depreciation, depletion and amortization		(212,382	)		(156,313	)

	Property, plant and equipment, net	$	831,778		$	813,607

Continental Cement Company, L.L.C. [Member]	'
Components of Property, Plant and Equipment	'
	Property, plant and equipment, net consist of the following as of year-end 2013 and 2012:


		2013			2012
	Land (non-mineral bearing)	$	4,605		$	4,605
	Land (mineral bearing) and asset retirement costs		16,524			15,449
	Buildings and improvements		40,795			40,681
	Plants, machinery and equipment		247,681			231,454
	Mobile equipment and barges		8,060			7,859
	Construction in progress		23,394			15,301
	Other		1,845			1,373

	Property, plant and equipment		342,904			316,722
	Less accumulated depreciation, depletion and amortization		(36,700	)		(25,056	)

	Property, plant and equipment, net	$	306,204		$	291,666

Debt_Tables

Debt (Tables)	6 Months Ended					12 Months Ended
Debt (Tables)	Jun. 28, 2014					Dec. 28, 2013
Schedule of Debt	'					'
	Debt consisted of the following as of June 28, 2014 and December 28, 2013:					Debt as of year-end 2013 and 2012 are summarized as follows:


		June 28,		December 28,			2013			2012
		2014		2013		Senior secured revolving credit facility	$	26,000		$	—
	Revolver	$	65,000	$	26,000
						Long-term debt:
						$250.0 million senior notes, net of discount of $4.0 million at December 28, 2013 and $4.7 million at December 29, 2012	$	245,971		$	245,303
	Long-term debt:					$419.9 million senior secured term loan credit facility, net of discount of $2.9 million at December 28, 2013 and $3.5 million at December 29, 2012		417,016			394,540
	$510.0 million senior notes, including a $17.3 million net premium at June 28, 2014 and $250 million senior notes, net of $4.0 million discount at December 28, 2013		527,319		245,971
	$417.8 million credit facility, term loan, net of $2.6 million and $2.9 million discount at June 28, 2014 and December 28, 2013, respectively		415,191		417,016	Total		662,987			639,843
						Current portion of long-term debt		4,220			4,000
	Total		942,510		662,987
	Current portion of long-term debt		4,220		4,220	Long-term debt	$	658,767		$	635,843

	Long-term debt	$	938,290	$	658,767

Schedule of Contractual Payments Long-Term Debt	'					'
	The contractual payments of long-term debt, including current maturities, for the five years subsequent to June 28, 2014, are as follows:					The total contractual payments of long-term debt for the five years subsequent to December 28, 2013 are as follows:


	2014 (six months)	$	2,110			2014	$	4,220
	2015		5,275			2015		4,220
	2016		4,220			2016		5,275
	2017		4,220			2017		4,220
	2018		3,165			2018		3,165
	2019		398,790			Thereafter		648,790
	Thereafter		510,000
						Total		669,890
	Total		927,780			Less: Original issue discount		(6,903	)
	Plus: Original issue net premium		14,730
						Total debt	$	662,987
	Total debt	$	942,510

Continental Cement Company, L.L.C. [Member]	'					'
Schedule of Contractual Payments Long-Term Debt	'					'
						Future maturities of long-term debt due to Summit Materials as of December 28, 2013 are as follows:


						2014	$	1,018
						2015		1,018
						2016		1,273
						2017		1,018
						2018		764
						Thereafter		150,517

						Total	$	155,608

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
INCOME TAXES (Tables)	Dec. 28, 2013
Income Tax Disclosure [Abstract]	'
Components of Income Tax (Benefit) Expense	'
	For the years ended 2013, 2012 and 2011, income taxes consist of the following:


		2013			2012			2011
	Provision for income taxes:
	Current	$	1,761		$	(452	)	$	5,382
	Deferred		(4,408	)		(3,468	)		(1,974	)

	Income tax (benefit) expense	$	(2,647	)	$	(3,920	)	$	3,408

Schedule of Income Tax Provision (Benefit)	'
	The effective tax rate on pre-tax income differs from the U.S. statutory rate due to the following:


		2013			2012			2011
	Income tax benefit at federal statutory tax rate	$	(37,160	)	$	(19,074	)	$	(6,895	)
	Book loss not subject to income tax		32,801			16,167			13,790
	State and local income taxes		130			(90	)		666
	Depletion expense		(411	)		(377	)		(372	)
	Domestic production activities deduction		—			—			(273	)
	Goodwill impairment		1,046			—			—
	Bargain purchase gain		—			—			(4,250	)
	Effective rate change		—			(532	)		627
	Valuation allowance		729			36			(360	)
	Other		218			(50	)		475

	Income tax (benefit) provision	$	(2,647	)	$	(3,920	)	$	3,408

Components of Net Deferred Income Tax Liability	'
	The following table summarizes the components of the net deferred income tax liability as of year-end 2013 and 2012:


		2013			2012
	Deferred tax assets (liabilities):
	Mining reclamation reserve	$	1,502		$	1,449
	Accelerated depreciation		(33,146	)		(34,733	)
	Net operating loss		2,227			2,134
	Capital losses on securities		997			989
	Landfill closure reserve		(63	)		(30	)
	Working capital (e.g., accrued compensation, prepaid assets)		2,399			3,101

	Deferred tax liabilities, net		(26,084	)		(27,090	)
	Less valuation allowance on loss carryforwards		(1,826	)		(1,025	)

	Total	$	(27,910	)	$	(28,115	)

	Included in accompanying consolidated balance sheets under the following captions:
	Other current assets	$	2,316		$	2,275
	Other noncurrent liability		(30,226	)		(30,390	)

	Total	$	(27,910	)	$	(28,115	)

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Dec. 28, 2013
Obligations and Funded Status	'
	Obligations and Funded Status—The following information is as of year-end 2013 and 2012 and for the years ended December 28, 2013, December 29, 2012 and December 31, 2011:


		2013						2012
		Pension			Other			Pension			Other
		benefits			benefits			benefits			benefits
	Change in benefit obligations:
	Beginning of period	$	28,674		$	15,810		$	26,514		$	14,467
	Service cost		295			236			276			207
	Interest cost		963			513			1,055			585
	Actuarial (gain) loss		(2,674	)		(1,048	)		2,347			1,597
	Special termination benefits		—			39			—			—
	Benefits paid		(1,614	)		(1,395	)		(1,518	)		(1,046	)

	End of period		25,644			14,155			28,674			15,810

	Change in fair value of plan assets:
	Beginning of period		17,863			—			16,639			—
	Actual return on plan assets		1,512			—			1,205			—
	Employer contributions		1,313			1,395			1,537			1,046
	Benefits paid		(1,614	)		(1,395	)		(1,518	)		(1,046	)

	End of period		19,074			—			17,863			—

	Funded status of plans	$	(6,570	)	$	(14,155	)	$	(10,811	)	$	(15,810	)

	Current liabilities	$	—		$	(1,268	)	$	—		$	(1,055	)
	Noncurrent liabilities		(6,570	)		(12,887	)		(10,811	)		(14,755	)

	Liability recognized	$	(6,570	)	$	(14,155	)	$	(10,811	)	$	(15,810	)

	Amounts recognized in accumulated other comprehensive income:
	Net actuarial loss	$	4,831		$	4,139		$	8,056		$	5,501
	Prior service cost		—			(1,346	)		—			(1,526	)

	Total amount recognized	$	4,831		$	2,793		$	8,056		$	3,975

Amounts Recognized in Other Comprehensive (Gain) Loss	'

		2013						2012						2011
		Pension			Other			Pension			Other			Pension			Other
		benefits			benefits			benefits			benefits			benefits			benefits
	Amounts recognized in other comprehensive (gain) loss:
	Net actuarial (gain) loss	$	(2,838	)	$	(1,048	)	$	2,444		$	1,597		$	4,066		$	3,390
	Prior service cost		—			180			—			—			—			(1,705	)
	Amortization of prior year service cost		—			—			—			180			—			—
	Amortization of (gain) loss		(387	)		(314	)		(261	)		(312	)		(5	)		(71	)

	Total amount recognized	$	(3,225	)	$	(1,182	)	$	2,183		$	1,465		$	4,061		$	1,614

Components of Net Periodic Benefit Cost	'

		2013						2012						2011
		Pension			Other			Pension			Other			Pension			Other
		benefits			benefits			benefits			benefits			benefits			benefits
	Amounts recognized in other comprehensive (gain) loss:
	Net actuarial (gain) loss	$	(2,838	)	$	(1,048	)	$	2,444		$	1,597		$	4,066		$	3,390
	Prior service cost		—			180			—			—			—			(1,705	)
	Amortization of prior year service cost		—			—			—			180			—			—
	Amortization of (gain) loss		(387	)		(314	)		(261	)		(312	)		(5	)		(71	)

	Total amount recognized	$	(3,225	)	$	(1,182	)	$	2,183		$	1,465		$	4,061		$	1,614

	Components of net periodic benefit cost:
	Service cost	$	295		$	236		$	276		$	207		$	275		$	227
	Interest cost		963			513			1,055			585			1,161			710
	Amortization of loss		387			314			262			312			5			69
	Expected return on plan assets		(1,348	)		—			(1,301	)		(180	)		(1,400	)		—
	Special termination benefits		—			39			—			—			—			—
	Amortization of prior service credit		—			(180	)		—			—			—			—

	Net periodic benefit cost	$	297		$	922		$	292		$	924		$	41		$	1,006

Weighted-Average Assumptions Used to Determine Benefit Obligations	'
	Assumptions—Weighted-average assumptions used to determine the benefit obligations as of year-end 2013 and 2012 are:


		2013			2012
		Pension		Other	Pension		Other
		benefits		benefits	benefits		benefits
	Discount rate	4.21% - 4.46%		4.33%	3.30% - 3.57%		3.41%
	Expected long-term rate of return on plan assets	7.50%		N/A	7.50%		N/A
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost	'
	Weighted-average assumptions used to determine net periodic benefit cost for years ended December 28, 2013, December 29, 2012 and December 31, 2011:


		2013			2012			2011
		Pension		Other	Pension		Other	Pension		Other
		benefits		benefits	benefits		benefits	benefits		benefits
	Discount rate	3.30% - 3.57%		3.41%	3.89% - 4.07%		4.00%	4.94% - 5.12.%		5.07%
	Expected long-term rate of return on plan assets	7.50%		N/A	7.50%		N/A	8.50%		N/A
Effects of One Percentage-Point Change in Assumed Health Care Cost Trend Rates	'
	A one percentage-point change in assumed health care cost trend rates would have the following effects as of year-end 2013 and 2012:


		2013						2012
		Increase			Decrease			Increase			Decrease
	Total service cost and interest cost components	$	66		$	(55	)	$	73		$	(63	)
	Estimated APBO		1,251			(1,073	)		1,555			(1,331	)
Fair Value of Company's Pension Plans' Assets	'
	The fair value of the Company’s pension plans’ assets by asset class and fair value hierarchy level as of year-end 2013 and 2012 are as follows:


		2013
		Total fair			Quoted prices in active			Observable
		value			markets for identical			inputs (Level 2)
					assets (Level 1)
	Fixed income securities:
	Intermediate—government	$	1,647		$	—		$	1,647
	Intermediate—corporate		3,138			—			3,138
	Short-term—government		2,168			—			2,168
	Short-term—corporate		4,040			—			4,040
	Equity securities:
	U.S. Large cap value		1,221			1,221			—
	U.S. Large cap growth		1,536			1,536			—
	U.S. Mid cap value		600			600			—
	U.S. Mid cap growth		603			603			—
	U.S. Small cap value		610			610			—
	U.S. Small cap growth		599			599			—
	International		889			889			—
	Cash		1,665			1,665			—
	Precious metals		358			358			—

	Total	$	19,074		$	8,081		$	10,993



		2012
		Total			Quoted prices in active			Observable
		fair			markets for identical			inputs (Level 2)
		value			assets (Level 1)
	Fixed income securities:
	Intermediate—government	$	1,247		$	—		$	1,247
	Intermediate—corporate		4,402			—			4,402
	Short-term—government		2,038			—			2,038
	Short-term—corporate		3,123			—			3,123
	Equity securities:
	U.S. Large cap value		1,063			1,063			—
	U.S. Large cap growth		1,037			1,037			—
	U.S. Mid cap value		542			542			—
	U.S. Mid cap growth		536			536			—
	U.S. Small cap value		546			546			—
	U.S. Small cap growth		539			539			—
	International		1,134			1,134			—
	Cash		1,656			1,656			—

	Total	$	17,863		$	7,053		$	10,810

Estimated Benefit Payments	'
	The estimated benefit payments for each of the next five years and the five-year period thereafter are as follows:


		Pension			Other
		benefits			benefits
	2014	$	1,694		$	1,269
	2015		1,704			1,109
	2016		1,739			1,130
	2017		1,737			963
	2018		1,774			1,018
	2019 - 2023		8,667			4,512

	Total	$	17,315		$	10,001

Continental Cement Company, L.L.C. [Member]	'
Amounts Recognized in Other Comprehensive (Gain) Loss	'

		2013						2012						2011
		Pension			Other			Pension			Other			Pension			Other
		benefits			benefits			benefits			benefits			benefits			benefits
	Amounts recognized in other comprehensive (gain) loss:
	Net actuarial (gain) loss	$	(2,838	)	$	(1,048	)	$	2,444		$	1,597		$	4,066		$	3,390
	Prior service cost		—			180			—			—			—			(1,705	)
	Amortization of prior year service cost		—			—			—			180			—			—
	Amortization of (gain) loss		(387	)		(314	)		(261	)		(312	)		(5	)		(71	)

	Total amount recognized	$	(3,225	)	$	(1,182	)	$	2,183		$	1,465		$	4,061		$	1,614

Components of Net Periodic Benefit Cost	'

		2013						2012						2011
		Pension			Other			Pension			Other			Pension			Other
		benefits			benefits			benefits			benefits			benefits			benefits
	Amounts recognized in other comprehensive (gain) loss:
	Net actuarial (gain) loss	$	(2,838	)	$	(1,048	)	$	2,444		$	1,597		$	4,066		$	3,390
	Prior service cost		—			180			—			—			—			(1,705	)
	Amortization of prior year service cost		—			—			—			180			—			—
	Amortization of (gain) loss		(387	)		(314	)		(261	)		(312	)		(5	)		(71	)

	Total amount recognized	$	(3,225	)	$	(1,182	)	$	2,183		$	1,465		$	4,061		$	1,614

	Components of net periodic benefit cost:
	Service cost	$	295		$	236		$	276		$	207		$	275		$	227
	Interest cost		963			513			1,055			585			1,161			710
	Amortization of loss		387			314			262			312			5			69
	Expected return on plan assets		(1,348	)		—			(1,301	)		(180	)		(1,400	)		—
	Special termination benefits		—			39			—			—			—			—
	Amortization of Prior Service Credit		—			(180	)		—			—			—			—

	Net periodic benefit cost	$	297		$	922		$	292		$	924		$	41		$	1,006

Weighted-Average Assumptions Used to Determine Benefit Obligations	'
	Assumptions—Weighted-average assumptions used to determine the benefit obligations as of year-end 2013 and 2012 are:


		2013			2012
		Pension		Other	Pension		Other
		benefits		benefits	benefits		benefits
	Discount rate	4.21% - 4.46%		4.33%	3.30% - 3.57%		3.41%
	Expected long-term rate of return on plan assets	7.50%		N/A	7.50%		N/A
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost	'
	Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 28, 2013, December 31, 2012 and December 31, 2011:


		2013			2012			2011
		Pension		Other	Pension		Other	Pension		Other
		benefits		benefits	benefits		benefits	benefits		benefits
	Discount rate	3.30% - 3.57%		3.41%	3.89% - 4.07%		4.00%	4.94% - 5.12.%		5.07%
	Expected long-term rate of return on plan assets	7.50%		N/A	7.50%		N/A	8.50%		N/A
Effects of One Percentage-Point Change in Assumed Health Care Cost Trend Rates	'
	A one percentage-point change in assumed health care cost trend rates would have the following effects as of year-end 2013 and 2012:


		2013						2012
		Increase			Decrease			Increase			Decrease
	Total service cost and interest cost components	$	66		$	(55	)	$	73		$	(63	)
	Estimated APBO		1,251			(1,073	)		1,555			(1,331	)
Fair Value of Company's Pension Plans' Assets	'
	The fair value of the Company’s pension plans’ assets by asset class and fair value hierarchy level as of year-end 2013 and 2012 are as follows:


		2013
		Total fair			Quoted prices in active			Observable
		value			markets for identical			inputs (Level 2)
					assets (Level 1)
	Fixed income securities:
	Intermediate—government	$	1,647		$	—		$	1,647
	Intermediate—corporate		3,138			—			3,138
	Short-term—government		2,168			—			2,168
	Short-term—corporate		4,040			—			4,040
	Equity securities:
	U.S. Large cap value		1,221			1,221			—
	U.S. Large cap growth		1,536			1,536			—
	U.S. Mid cap value		600			600			—
	U.S. Mid cap growth		603			603			—
	U.S. Small cap value		610			610			—
	U.S. Small cap growth		599			599			—
	International		889			889			—
	Cash		1,665			1,665			—
	Precious metals		358			358			—

	Total	$	19,074		$	8,081		$	10,993



		2012
		Total			Quoted prices in active			Observable
		fair			markets for identical			inputs (Level 2)
		value			assets (Level 1)
	Fixed income securities:
	Intermediate—government	$	1,247		$	—		$	1,247
	Intermediate—corporate		4,402			—			4,402
	Short-term—government		2,038			—			2,038
	Short-term—corporate		3,123			—			3,123
	Equity securities:
	U.S. Large cap value		1,063			1,063			—
	U.S. Large cap growth		1,037			1,037			—
	U.S. Mid cap value		542			542			—
	U.S. Mid cap growth		536			536			—
	U.S. Small cap value		546			546			—
	U.S. Small cap growth		539			539			—
	International		1,134			1,134			—
	Cash		1,656			1,656			—

	Total	$	17,863		$	7,053		$	10,810

Estimated Benefit Payments	'
	The estimated benefit payments for each of the next five years and the five-year period thereafter are as follows:


		Pension			Other
		benefits			benefits
	2014	$	1,694		$	1,269
	2015		1,704			1,109
	2016		1,739			1,130
	2017		1,737			963
	2018		1,774			1,018
	2019 - 2023		8,667			4,512

	Total	$	17,315		$	10,001

Changes in Projected Benefit Obligations Fair Value of Plan Assets and Funded Status of Plan	'
	Obligations and Funded Status—The following information is as of year-end 2013 and 2012 and for the years ended December 28, 2013, December 31, 2012 and December 31, 2011:


		2013						2012
		Pension			Other			Pension			Other
		benefits			benefits			benefits			benefits
	Change in benefit obligations:
	Beginning of period	$	28,674		$	15,810		$	26,514		$	14,467
	Service cost		295			236			276			207
	Interest cost		963			513			1,055			585
	Actuarial (gain) loss		(2,674	)		(1,048	)		2,347			1,597
	Special termination benefits		—			39			—			—
	Benefits paid		(1,614	)		(1,395	)		(1,518	)		(1,046	)

	End of period		25,644			14,155			28,674			15,810

	Change in fair value of plan assets:
	Beginning of period		17,863			—			16,639			—
	Actual return on plan assets		1,512			—			1,205			—
	Employer contributions		1,313			1,395			1,537			1,046
	Benefits paid		(1,614	)		(1,395	)		(1,518	)		(1,046	)

	End of period		19,074			—			17,863			—

	Funded status of plans	$	(6,570	)	$	(14,155	)	$	(10,811	)	$	(15,810	)

	Current liabilities	$	—		$	(1,268	)	$	—		$	(1,055	)
	Noncurrent liabilities		(6,570	)		(12,887	)		(10,811	)		(14,755	)

	Liability recognized	$	(6,570	)	$	(14,155	)	$	(10,811	)	$	(15,810	)

	Amounts recognized in accumulated other comprehensive income:
	Net actuarial loss	$	4,831		$	4,139		$	8,056		$	5,501
	Prior service cost		—			(1,346	)		—			(1,526	)

	Total amount recognized	$	4,831		$	2,793		$	8,056		$	3,975

Accrued_Mining_and_Landfill_Re1

Accrued Mining and Landfill Reclamation (Tables)	12 Months Ended
Accrued Mining and Landfill Reclamation (Tables)	Dec. 28, 2013
Asset Retirement Obligation Disclosure [Abstract]	'
Activity for Asset Retirement Obligations	'
	long-lived asset and depreciated over the asset’s remaining useful life. The following table presents the activity for the asset retirement obligations for the years ended December 28, 2013 and December 29, 2012:


		2013			2012
	Beginning balance	$	14,844		$	13,328
	Acquired obligations		286			364
	Change in cost estimate		721			604
	Settlement of reclamation obligations		(1,201	)		(77	)
	Additional liabilities incurred		414			—
	Accretion expense		717			625

	Ending balance	$	15,781		$	14,844

AcquisitionRelated_Liabilities1

Acquisition-Related Liabilities (Tables)	12 Months Ended
Acquisition-Related Liabilities (Tables)	Dec. 28, 2013
Business Combinations [Abstract]	'
Remaining Payments Due under Noncompete and Deferred Consideration Agreements	'
	annual installments. The remaining payments due under these noncompete and deferred consideration agreements are as follows:


	2014	$	10,790
	2015		6,742
	2016		5,950
	2017		5,910
	2018		5,370
	Thereafter		9,963

	Total scheduled payments		44,725
	Present value adjustments		(12,242	)

	Total noncompete obligations and deferred consideration	$	32,483

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	6 Months Ended					12 Months Ended
Supplemental Cash Flow Information (Tables)	Jun. 28, 2014					Dec. 28, 2013
Schedule of Supplemental Cash Flow Information	'					'
	Supplemental cash flow information is as follows:					Supplemental cash flow information for the years ended December 28, 2013, December 29, 2012 and December 31, 2011 is as follows:


		Six months ended					2013		2012			2011
		June 28,		June 29,		Cash payments:
		2014		2013		Interest	$	52,001	$	36,357		$	41,790
	Cash payments:					Income taxes		457		799			5,608
	Interest	$	25,881	$	31,439
	Income taxes		1,320		653
Continental Cement Company, L.L.C. [Member]	'					'
Schedule of Supplemental Cash Flow Information	'					'
						Supplemental cash flow information is as follows for the years ended December 28, 2013, December 31, 2012 and December 31, 2011:


							2013		2012			2011
						Cash paid for interest	$	11,488	$	7,353		$	12,946
						Non cash financing activities:
						Proceeds on borrowings due to Summit Materials	$	—	$	156,842		$	—
						Repayment by Summit Materials of long-term debt and accrued interest		—		(156,842	)		—

Leasing_Arrangements_Tables

Leasing Arrangements (Tables)	12 Months Ended
Leasing Arrangements (Tables)	Dec. 28, 2013
Minimum Contractual Commitments under Long-Term Operating Leases	'
	Minimum contractual commitments under long-term operating leases, which primarily relate to land, plant and equipment and under royalty agreements as of December 28, 2013, are as follows:


		Operating		Royalty
		Leases		Agreements
	2014	$	4,034	$	2,044
	2015		3,890		2,065
	2016		3,098		1,974
	2017		2,376		2,047
	2018		1,983		1,434
Continental Cement Company, L.L.C. [Member]	'
Minimum Contractual Commitments under Long-Term Operating Leases	'
	Minimum rental commitments under long-term operating leases as of December 28, 2013, are as follows:


	2014	$	378
	2015		341
	2016		325
	2017		291
	2018		291

Employee_Long_Term_Incentive_P1

Employee Long Term Incentive Plan (Tables)	12 Months Ended
Employee Long Term Incentive Plan (Tables)	Dec. 28, 2013
Summary of Information for Class D Unit Interests	'
	and $3,876, respectively. The following table summarizes information for the Class D unit interests:


		Time-vesting Interests					Performance-vesting
		Time-vesting Interests					Interests
		Number of			Weighted		Number of			Weighted
		units			average grant-		units			average grant-
					date fair value					date fair value
					per unit					per unit
	Beginning balance—December 29, 2012		1,692		$	3,864		4,202		$	3,087
	Granted		584			2,786		759			2,314
	Vested		(772	)		3,896		—			—
	Forfeited		(2	)		3,893		(5	)		3,176
	Cancelled		(61	)		2,208		(79	)		1,388

	Balance—December 28, 2013		1,441					4,877

Capital Units [Member]	'
Weighted Average Assumptions Used to Estimate the Fair Value of Grants	'
	The following table presents the weighted average assumptions used to estimate the fair value of grants in 2013, 2012 and 2011:


		2013		2012	2011
	Class D Units
	Risk-free interest rate	0.50%		1.62%	1.71% - 2.39%
	Dividend yield	None		None	None
	Volatility	58%		47%	42% - 49%
	Expected term	4 years		6 - 8 years	6 - 8 years

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended									12 Months Ended
Segment Information (Tables)	Jun. 28, 2014									Dec. 28, 2013
Segment Reporting [Abstract]	'									'
Summary of Financial Data for Company's Reportable Business Segments	'									'
	The following tables display selected financial data for the Company’s reportable segments:									The following tables display selected financial data for the Company’s reportable business segments for the following fiscal years:


			Six months ended									2013				2012				2011
			June 28,				June 29,			Revenue:
			2014				2013			Central region		$	329,621			$	302,113			$	264,008
	Revenue:									West region			426,195				484,922				362,577
	West region		$	267,130			$	179,719		East region			160,385				139,219				162,491
	Central region			156,659				128,680
	East region			51,597				53,272		Total revenue		$	916,201			$	926,254			$	789,076

	Total revenue		$	475,386			$	361,671

												2013				2012				2011
										Segment profit (loss):
			Six months ended							Central region		$	72,918			$	65,767			$	65,651
			June 28,				June 29,			West region			28,607				14,429				36,442
			2014				2013			East region			15,134				10,782				15,504
	Segment profit:									Corporate and other (1)			(24,878	)			(15,560	)			(9,877	)
	West region		$	32,541			$	85
	Central region			28,400				19,182		Total reportable segments and corporate			91,781				75,418				107,720
	East region			(1,406	)			(2,377	)	Interest expense			56,443				58,079				47,784
	Corporate and other			(19,046	)			(12,272	)	Depreciation, depletion, amortization and accretion			72,934				68,290				61,377
										Goodwill impairment			68,202				—				—
	Total reportable segments and corporate			40,489				4,618
	Interest expense			40,470				27,849		Loss from continuing operations before taxes		$	(105,798	)		$	(50,951	)		$	(1,441	)
	Depreciation, depletion, amortization and accretion			40,695				36,026

	Income (loss) from continuing operations before taxes		$	(40,676	)		$	(59,257	)	-1	Corporate results primarily consist of compensation and office expenses for employees included in the Company’s headquarters and transactions costs.


												2013				2012				2011
			Six months ended							Cash paid for capital expenditures:
			June 28,				June 29,			Central region		$	33,030			$	20,996			$	20,078
			2014				2013			West region			21,856				14,993				9,256
	Cash paid for capital expenditures:									East region			7,753				8,736				9,311
	West region		$	17,924			$	14,194
	Central region			23,372				19,826		Total reportable segments			62,639				44,725				38,645
	East region			5,533				5,742		Corporate and other			3,360				763				11

	Total reportable segments			46,829				39,762		Total capital expenditures		$	65,999			$	45,488			$	38,656
	Corporate and other			2,431				766

	Total capital expenditures		$	49,260			$	40,528

												2013				2012				2011
										Depreciation, depletion, amortization and accretion:
			Six months ended							Central region		$	33,808			$	30,215			$	27,646
			June 28,				June 29,			West region			24,167				23,771				19,706
			2014				2013			East region			14,493				14,223				13,938
	Depreciation, depletion, amortization and accretion:
	West region		$	14,414			$	12,291		Total reportable segments			72,468				68,209				61,290
	Central region			18,351				16,329		Corporate and other			466				81				87
	East region			7,288				7,362
										Total depreciation, depletion, amortization and accretion		$	72,934			$	68,290			$	61,377
	Total reportable segments			40,053				35,982
	Corporate and other			642				44

	Total depreciation, depletion, amortization and accretion		$	40,695			$	36,026
												2013				2012				2011
										Total assets:
										Central region		$	657,421			$	610,003			$	587,341
			June 28,				December 28,			West region			383,544				428,115				451,017
2014			2013				East region				192,486				224,603				238,018
Total assets:
West region		$	659,071			$	383,544		Total reportable segments			1,233,451				1,262,721				1,276,376
Central region			694,582				657,421		Corporate and other			14,343				18,492				7,889
East region			235,835				192,486
									Total assets		$	1,247,794			$	1,281,213			$	1,284,265
Total reportable segments			1,589,488				1,233,451
Corporate and other			28,152				14,343

Total		$	1,617,640			$	1,247,794
											2013				2012				2011
									Revenue by product:*
									Aggregates		$	159,019			$	146,991			$	116,082
		Six months ended							Cement			76,211				77,676				69,664
		June 28,				June 29,			Ready-mixed concrete			112,878				100,941				94,302
		2014				2013			Asphalt			219,811				242,458				182,952
Revenue by product:*									Construction and paving			478,280				505,189				464,866
Aggregates		$	91,365			$	68,304		Other			(129,998	)			(147,001	)			(138,790	)
Cement			33,387				30,914
Ready-mixed concrete			113,769				46,412		Total revenue		$	916,201			$	926,254			$	789,076
Asphalt			99,082				75,208
Paving and related services			199,420				171,946
Other			(61,637	)			(31,113	)	*	Revenue by product includes intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other.

Total revenue		$	475,386			$	361,671


	*	Revenue by product includes intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other.

SENIOR_NOTES_GUARANTOR_AND_NON1

SENIOR NOTES' GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Tables)	6 Months Ended																									12 Months Ended
	Jun. 28, 2014																									Dec. 28, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'																									'
Schedule of Condensed Consolidating Balance Sheets	'																									'
	Condensed Consolidating Balance Sheets																									Condensed Consolidating Balance Sheets
	June 28, 2014																									December 28, 2013


			Issuers				Non-Wholly-owned				Wholly-				Non-				Elim-				Consol-					Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
							Guarantor				owned				Guarantors				inations				idated					Materials,				Wholly-				owned				Guarantors
											Guarantors																	LLC				owned				Guarantors
	Assets																											(Parent)				Guarantor
																										Assets
	Current assets:																									Current assets:
	Cash		$	21,685			$	7			$	2,681			$	4,723			$	(8,294	)		$	20,802		Cash		$	10,375			$	9			$	3,442			$	3,631			$	(2,540	)		$	14,917
	Accounts receivable, net			—				12,338				128,876				4,922				(2,368	)			143,768		Accounts receivable, net			—				4,587				93,102				3,100				(1,452	)			99,337
	Intercompany receivables			264,955				—				33,532				—				(298,487	)			—		Intercompany receivables			38,134				3,433				30,787				—				(72,354	)			—
	Cost and estimated earnings in excess of billings			—				—				21,018				761				—				21,779		Cost and estimated earnings in excess of billings			—				—				10,539				228				—				10,767
	Inventories			—				14,569				102,293				2,309				—				119,171		Inventories			—				10,402				85,372				658				—				96,432
	Other current assets			2,791				722				9,645				375				(298	)			13,235		Other current assets			750				444				11,715				272				—				13,181

	Total current assets			289,431				27,636				298,045				13,090				(309,447	)			318,755		Total current assets			49,259				18,875				234,957				7,889				(76,346	)			234,634
	Property, plant and equipment, net			5,755				305,274				602,744				6,740				—				920,513		Property, plant and equipment, net			3,969				301,908				518,935				6,966				—				831,778
	Goodwill			—				23,124				293,227				972				—				317,323		Goodwill			—				23,124				102,942				972				—				127,038
	Intangible assets, net			—				592				14,683				—				—				15,275		Intangible assets, net			—				642				14,505				—				—				15,147
	Other assets			499,692				20,378				63,234				1,235				(538,765	)			45,774		Other assets			296,494				17,973				37,535				1,303				(314,108	)			39,197

	Total assets		$	794,878			$	377,004			$	1,271,933			$	22,037			$	(848,212	)		$	1,617,640		Total assets		$	349,722			$	362,522			$	908,874			$	17,130			$	(390,454	)		$	1,247,794

																										Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
	Liabilities, Redeemable Noncontrolling Interest and Member’s Interest																									Current liabilities:
																										Current portion of debt		$	26,010			$	1,018			$	3,192			$	—			$	—			$	30,220
	Current liabilities:																									Current portion of acquisition-related liabilities			2,000				—				8,635				—				—				10,635
	Current portion of debt		$	69,220			$	1,018			$	3,192			$	—			$	(4,210	)		$	69,220		Accounts payable			5,455				9,387				57,142				1,572				(1,452	)			72,104
	Current portion of acquisition-related liabilities			1,141				—				17,898				—				—				19,039		Accrued expenses			12,041				9,185				37,342				1,223				(2,540	)			57,251
	Accounts payable			4,517				7,978				64,426				3,691				(2,368	)			78,244		Intercompany payables			—				—				71,556				798				(72,354	)			—
	Accrued expenses			25,566				7,691				62,068				1,180				(8,592	)			87,913		Billings in excess of costs and estimated earnings			—				—				8,837				426				—				9,263
	Intercompany payables			101,411				21,810				174,376				890				(298,487	)			—
	Billings in excess of costs and estimated earnings			—				—				4,877				25				—				4,902		Total current liabilities			45,506				19,590				186,704				4,019				(76,346	)			179,473
																										Long-term debt			19,587				154,590				484,590				—				—				658,767
	Total current liabilities			201,855				38,497				326,837				5,786				(313,657	)			259,318		Acquisition-related liabilities			85				—				23,671				—				—				23,756
	Long-term debt			938,290				154,081				482,993				—				(637,074	)			938,290		Other noncurrent liabilities			959				20,306				56,215				—				—				77,480
	Acquisition-related liabilities			—				—				40,947				—				—				40,947
	Other noncurrent liabilities			879				17,570				64,966				—				—				83,415		Total liabilities			66,137				194,486				751,180				4,019				(76,346	)			939,476
																										Redeemable noncontrolling interest			—				—				—				—				24,767				24,767
	Total liabilities			1,141,024				210,148				915,743				5,786				(950,731	)			1,321,970		Redeemable members’ interest			—				23,450				—				—				(23,450	)			—
	Redeemable noncontrolling interest			—				—				—				—				26,825				26,825		Total member’s interest			283,585				144,586				157,694				13,111				(315,425	)			283,551
	Redeemable members’ interest			—				23,750				—				—				(23,750	)			—
	Total member’s interest			(346,146	)			143,106				356,190				16,251				99,444				268,845		Total liabilities, redeemable noncontrolling interest and member’s interest		$	349,722			$	362,522			$	908,874			$	17,130			$	(390,454	)		$	1,247,794

	Total liabilities, redeemable noncontrolling interest and member’s interest		$	794,878			$	377,004			$	1,271,933			$	22,037			$	(848,212	)		$	1,617,640
																										Condensed Consolidating Balance Sheets
																										December 29, 2012
	Condensed Consolidating Balance Sheets
	December 28, 2013
																												Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
																												Materials,				Wholly-				owned				Guarantors
			Issuers				Non-Wholly-owned				Wholly-				Non-				Elim-				Consol-					LLC				owned				Guarantors
							Guarantor				owned				Guarantors				inations				idated					(Parent)				Guarantor
											Guarantors															Assets
	Assets																									Current assets:
																										Cash		$	697			$	397			$	30,981			$	680			$	(5,324	)		$	27,431
	Current assets:																									Accounts receivable, net			—				7,421				90,765				3,255				(1,143	)			100,298
	Cash		$	10,375			$	9			$	3,442			$	3,631			$	(2,540	)		$	14,917		Intercompany receivables			14,931				15,557				9,018				—				(39,506	)			—
	Accounts receivable, net			—				4,587				93,102				3,100				(1,452	)			99,337		Cost and estimated earnings in excess of billings			—				—				11,428				147				—				11,575
	Intercompany receivables			38,134				3,433				30,787				—				(72,354	)			—		Inventories			—				7,073				84,555				1,349				—				92,977
	Cost and estimated earnings in excess of billings			—				—				10,539				228				—				10,767		Other current assets			25				726				8,447				2,409				(1,539	)			10,068
Inventories			—				10,402				85,372				658				—				96,432
Other current assets			750				444				11,715				272				—				13,181		Total current assets			15,653				31,174				235,194				7,840				(47,512	)			242,349
																									Property, plant and equipment, net			1,074				287,677				517,994				6,862				—				813,607
Total current assets			49,259				18,875				234,957				7,889				(76,346	)			234,634		Goodwill			—				23,124				155,024				972				—				179,120
Property, plant and equipment, net			3,969				301,908				518,935				6,966				—				831,778		Intangible assets, net			—				742				7,864				—				—				8,606
Goodwill			—				23,124				102,942				972				—				127,038		Other assets			374,581				11,891				161,442				1,315				(511,698	)			37,531
Intangible assets, net			—				642				14,505				—				—				15,147
Other assets			296,494				17,973				37,535				1,303				(314,108	)			39,197		Total assets		$	391,308			$	354,608			$	1,077,518			$	16,989			$	(559,210	)		$	1,281,213

Total assets		$	349,722			$	362,522			$	908,874			$	17,130			$	(390,454	)		$	1,247,794		Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
																									Current liabilities:
																									Current portion of debt		$	—			$	965			$	3,035			$	—			$	—			$	4,000
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest																									Current portion of acquisition-related liabilities			—				—				9,525				—				—				9,525
																									Accounts payable			2,745				6,715				51,179				2,138				(1,143	)			61,634
Current liabilities:																									Accrued expenses			6,877				10,742				38,050				1,015				(6,862	)			49,822
Current portion of debt		$	26,010			$	1,018			$	3,192			$	—			$	—			$	30,220		Intercompany payables			—				—				33,396				6,110				(39,506	)			—
Current portion of acquisition-related liabilities			2,000				—				8,635				—				—				10,635		Billings in excess of costs and estimated earnings			—				—				6,656				270				—				6,926
Accounts payable			5,455				9,387				57,142				1,572				(1,452	)			72,104
Accrued expenses			12,041				9,185				37,342				1,223				(2,540	)			57,251		Total current liabilities			9,622				18,422				141,841				9,533				(47,511	)			131,907
Intercompany payables			—				—				71,556				798				(72,354	)			—		Long-term debt			—				155,394				480,449				—				—				635,843
Billings in excess of costs and estimated earnings			—				—				8,837				426				—				9,263		Acquisition-related liabilities			—				—				23,919				—				—				23,919
																									Other noncurrent liabilities			395				27,091				56,780				—				—				84,266
Total current liabilities			45,506				19,590				186,704				4,019				(76,346	)			179,473
Long-term debt			19,587				154,590				484,590				—				—				658,767		Total liabilities			10,017				200,907				702,989				9,533				(47,511	)			875,935
Acquisition-related liabilities			85				—				23,671				—				—				23,756		Redeemable noncontrolling interest			—				—				—				—				22,850				22,850
Other noncurrent liabilities			959				20,306				56,215				—				—				77,480		Redeemable members’ interest			—				22,850				—				—				(22,850	)			—
																									Total member’s interest			381,291				130,851				374,529				7,456				(511,699	)			382,428
Total liabilities			66,137				194,486				751,180				4,019				(76,346	)			939,476
Redeemable noncontrolling interest			—				—				—				—				24,767				24,767		Total liabilities, redeemable noncontrolling interest and member’s interest		$	391,308			$	354,608			$	1,077,518			$	16,989			$	(559,210	)		$	1,281,213
Redeemable members’ interest			—				23,450				—				—				(23,450	)			—
Total member’s interest			283,585				144,586				157,694				13,111				(315,425	)			283,551

Total liabilities, redeemable noncontrolling interest and member’s interest		$	349,722			$	362,522			$	908,874			$	17,130			$	(390,454	)		$	1,247,794

Schedule of Condensed Consolidating Statements of Operations	'																									'
																										Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
																										Year ended December 28, 2013
	Condensed Consolidating Statements of Operations

	For the six months ended June 28, 2014																											Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
																												Materials				Wholly-				owned				Guarantors
																												LLC				owned				Guarantors
																												(Parent)				Guarantor
			Issuers				Non-Wholly-owned				Wholly-				Non-				Elim-				Consol-			Total revenue		$	—			$	80,759			$	807,921			$	41,910			$	(14,389	)		$	916,201
							Guarantor				owned				Guarantors				inations				idated
											Guarantors															Cost of revenue (excluding items shown separately below)			—				55,241				611,799				24,401				(14,389	)			677,052
	Revenue		$	—			$	35,264			$	427,717			$	21,274			$	(8,869	)		$	475,386		General and administrative expenses			7,241				7,673				125,778				1,308				—				142,000
																										Goodwill impairment			—				—				68,202				—				—				68,202
																										Depreciation, depletion, amortization and accretion			465				11,378				60,078				1,013				—				72,934
	Cost of revenue (excluding items shown separately below)			—				27,626				328,318				13,362				(8,869	)			360,437		Transaction costs			—				—				3,990				—				—				3,990
	General and administrative expenses			17,690				3,574				53,521				566				—				75,351
	Depreciation, depletion, amortization and accretion			642				6,777				32,731				545				—				40,695		Operating (loss) income			(7,706	)			6,467				(61,926	)			15,188				—				(47,977	)
																										Other expense (income), net			99,085				(3,737	)			(3,410	)			274				(90,834	)			1,378
	Operating (loss) income			(18,332	)			(2,713	)			13,147				6,801				—				(1,097	)	Interest expense			—				10,702				49,591				382				(4,232	)			56,443
	Other expense (income), net			7,725				(1,358	)			(1,553	)			45				(5,750	)			(891	)
	Interest expense			13,668				5,857				24,415				56				(3,526	)			40,470		(Loss) income from continuing operations before taxes			(106,791	)			(498	)			(108,107	)			14,532				95,066				(105,798	)
																										Income tax expense			—				—				(2,647	)			—				—				(2,647	)
	(Loss) income from continuing operations before taxes			(39,725	)			(7,212	)			(9,715	)			6,700				9,276				(40,676	)
	Income tax benefit			(1,427	)			—				(33	)			—				—				(1,460	)	(Loss) income from continuing operations			(106,791	)			(498	)			(105,460	)			14,532				95,066				(103,151	)
																										Loss from discontinued operations			—				—				528				—				—				528
	(Loss) income from continuing operations			(38,298	)			(7,212	)			(9,682	)			6,700				9,276				(39,216	)
	Income from discontinued operations			—				—				(349	)			—				—				(349	)	Net (loss) income			(106,791	)			(498	)			(105,988	)			14,532				95,066				(103,679	)
																										Net income attributable to noncontrolling interest			—				—				—				—				3,112				3,112
	Net (loss) income			(38,298	)			(7,212	)			(9,333	)			6,700				9,276				(38,867	)
	Net loss attributable to noncontrolling interest			—				—				—				—				(569	)			(569	)	Net (loss) income attributable to member of Summit Materials, LLC		$	(106,791	)		$	(498	)		$	(105,988	)		$	14,532			$	91,954			$	(106,791	)

	Net (loss) income attributable to member of Summit Materials, LLC		$	(38,298	)		$	(7,212	)		$	(9,333	)		$	6,700			$	9,845			$	(38,298	)	Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(106,791	)		$	3,909			$	(105,988	)		$	14,532			$	90,632			$	(103,706	)

	Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(38,298	)		$	(6,394	)		$	(9,333	)		$	6,700			$	9,600			$	(37,725	)
																										Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
																										Year ended December 29, 2012


	Condensed Consolidating Statements of Operations																											Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
																												Materials				Wholly-				owned				Guarantors
	For the six months ended June 29, 2013																											LLC				owned				Guarantors
																												(Parent)				Guarantor
																										Total revenue		$	—			$	81,516			$	824,796			$	33,074			$	(13,132	)		$	926,254

			Issuers				Non-Wholly-owned				Wholly-				Non-				Elim-				Consol-			Cost of revenue (excluding items shown separately below)			—				58,319				649,577				18,582				(13,132	)			713,346
							Guarantor				owned				Guarantors				inations				idated			General and administrative expenses			8				6,235				119,645				1,327				—				127,215
											Guarantors															Depreciation, depletion, amortization and accretion			81				10,093				57,080				1,036				—				68,290
	Revenue		$	—			$	32,799			$	314,895			$	20,486			$	(6,509	)		$	361,671		Transaction costs			—				—				1,988				—				—				1,988

																										Operating (loss) income			(89	)			6,869				(3,494	)			12,129				—				15,415
	Cost of revenue (excluding items shown separately below)			—				27,833				243,357				13,235				(6,509	)			277,916		Other expense (income), net			52,400				(2,065	)			6,630				(101	)			(48,577	)			8,287
	General and administrative expenses			2,896				5,083				67,296				584				—				75,859		Interest expense			—				12,045				47,293				633				(1,892	)			58,079
	Depreciation, depletion, amortization and accretion			44				5,532				29,938				512				—				36,026
																										(Loss) income from continuing operations before taxes			(52,489	)			(3,111	)			(57,417	)			11,597				50,469				(50,951	)
	Operating (loss) income			(2,940	)			(5,649	)			(25,696	)			6,155				—				(28,130	)	Income tax expense			5				—				(3,925	)			—				—				(3,920	)
	Other expense (income), net			51,549				(1,295	)			1,529				174				(48,679	)			3,278
	Interest expense			—				5,423				24,095				239				(1,908	)			27,849		(Loss) income from continuing operations			(52,494	)			(3,111	)			(53,492	)			11,597				50,469				(47,031	)
																										Loss from discontinued operations			—				—				3,546				—				—				3,546
	(Loss) income from continuing operations before taxes			(54,489	)			(9,777	)			(51,320	)			5,742				50,587				(59,257	)
	Income tax benefit			—				—				(3,347	)			—				—				(3,347	)	Net (loss) income			(52,494	)			(3,111	)			(57,038	)			11,597				50,469				(50,577	)
																										Net income attributable to noncontrolling interest			—				—				—				—				1,919				1,919
	(Loss) income from continuing operations			(54,489	)			(9,777	)			(47,973	)			5,742				50,587				(55,910	)
	Loss from discontinued operations			—				—				97				—				—				97		Net (loss) income attributable to member of Summit Materials, LLC		$	(52,494	)		$	(3,111	)		$	(57,038	)		$	11,597			$	48,550			$	(52,496	)

Net (loss) income			(54,489	)			(9,777	)			(48,070	)			5,742				50,587				(56,007	)	Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(52,494	)		$	(6,759	)		$	(57,038	)		$	11,597			$	49,645			$	(55,049	)
Net loss attributable to noncontrolling interest			—				—				—				—				(1,518	)			(1,518	)

Net (loss) income attributable to member of Summit Materials, LLC		$	(54,489	)		$	(9,777	)		$	(48,070	)		$	5,742			$	52,105			$	(54,489	)	Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
																									Year ended December 31, 2011


																											Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
																											Materials				Wholly-				owned				Guarantors
																											LLC				owned				Guarantors
																											(Parent)				Guarantor
																									Total revenue		$	—			$	70,064			$	700,916			$	21,566			$	(3,470	)		$	789,076

																									Cost of revenue (excluding items shown separately below)			—				41,221				542,699				17,204				(3,470	)			597,654
																									General and administrative expenses			1,453				3,933				89,011				1,429				—				95,826
																									Depreciation, depletion, amortization and accretion			87				9,697				50,640				953				—				61,377
																									Transaction costs			—				—				9,120				—				—				9,120

																									Operating (loss) income			(1,540	)			15,213				9,446				1,980				—				25,099
																									Other expense (income), net			8,510				(61	)			(24,375	)			124				(5,442	)			(21,244	)
																									Interest expense			—				14,004				33,685				647				(552	)			47,784

																									(Loss) income from continuing operations before taxes			(10,050	)			1,270				136				1,209				5,994				(1,441	)
																									Income tax expense			—				—				3,408				—				—				3,408

																									(Loss) income from continuing operations			(10,050	)			1,270				(3,272	)			1,209				5,994				(4,849	)
																									Loss from discontinued operations			—				—				5,201				—				—				5,201

																									Net (loss) income			(10,050	)			1,270				(8,473	)			1,209				5,994				(10,050	)
																									Net income attributable to noncontrolling interest			695				—				695				—				(695	)			695

																									Net (loss) income attributable to member of Summit Materials, LLC		$	(10,745	)		$	1,270			$	(9,168	)		$	1,209			$	6,689			$	(10,745	)

																									Comprehensive (loss) income attributable to member of Summit Materials, LLC		$	(9,375	)		$	(4,405	)		$	(13,473	)		$	1,209			$	10,994			$	(15,050	)

Schedule of Condensed Consolidating Statements of Cash Flows	'																									'
	Condensed Consolidating Statements of Cash Flows																									Condensed Consolidating Statements of Cash Flows
	For the six months ended June 28, 2014																									Year ended December 28, 2013


			Issuers				Non-Wholly-owned				Wholly-				Non-				Elim-				Consol-					Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
							Guarantor				owned				Guarantors				inations				idated					Materials,				Wholly-				owned				Guarantors
											Guarantors																	LLC				owned				Guarantors
	Net cash (used in) provided by operating activities		$	(18,665	)		$	(13,153	)		$	(13,412	)		$	168			$	(818	)		$	(45,880	)			(Parent)				Guarantor
																										Net cash (used for) provided by operating activities		$	(232	)		$	9,003			$	44,746			$	12,895			$	—			$	66,412

	Cash flow from investing activities:																									Cash flow from investing activities:
	Acquisitions, net of cash acquired			(181,754	)			—				(53,116	)			—				—				(234,870	)	Acquisitions, net of cash acquired			—				—				(61,601	)			—				—				(61,601	)
	Purchase of property, plant and equipment			(2,428	)			(11,829	)			(34,666	)			(337	)			—				(49,260	)	Purchase of property, plant and equipment			(3,359	)			(24,896	)			(36,629	)			(1,115	)			—				(65,999	)
	Proceeds from the sale of property, plant, and equipment			—				—				5,912				73				—				5,985		Proceeds from the sale of property, plant, and equipment			—				3				16,020				62				—				16,085
	Other			—				—				(409	)			—				1,166				757
																										Net cash used for investing activities			(3,359	)			(24,893	)			(82,210	)			(1,053	)			—				(111,515	)
	Net cash used for investing activities			(184,182	)			(11,829	)			(82,279	)			(264	)			1,166				(277,388	)
																										Cash flow from financing activities
																										Net proceeds from debt issuance			230,817				—				—				—				—				230,817
	Cash flow from financing activities:																									Loans received from and payments made on loans from other Summit Companies			(29,121	)			15,502				19,726				(8,891	)			2,784				—
	Proceeds from investment by member			24,350				—				—				1,166				(1,166	)			24,350		Payments on long-term debt			(188,424	)			—				—				—				—				(188,424	)
	Net proceeds from debt issuance			424,750				—				—				—				—				424,750		Payments on acquisition-related liabilities			—				—				(9,801	)			—				—				(9,801	)
	Loans received from and payments made on loans from other Summit Companies			(123,441	)			25,234				104,121				22				(5,936	)			—		Other			(3	)			—				—				—				—				(3	)
	Payments on long-term debt			(104,060	)			(254	)			(4,932	)			—				—				(109,246	)
	Payments on acquisition-related liabilities			(1,000	)			—				(3,259	)			—				—				(4,259	)	Net cash provided by (used for) financing activities			13,269				15,502				9,925				(8,891	)			2,784				32,589
	Financing costs			(6,354	)			—				—				—				—				(6,354	)
	Other			(88	)			—				(1,000	)			—				1,000				(88	)	Net decrease (increase) in cash			9,678				(388	)			(27,539	)			2,951				2,784				(12,514	)
																										Cash—Beginning of period			697				397				30,981				680				(5,324	)			27,431
	Net cash provided by (used for) financing activities			214,157				24,980				94,930				1,188				(6,102	)			329,153
																										Cash—End of period		$	10,375			$	9			$	3,442			$	3,631			$	(2,540	)		$	14,917

	Net increase (decrease) in cash			11,310				(2	)			(761	)			1,092				(5,754	)			5,885
																										Condensed Consolidating Statements of Cash Flows
	Cash—Beginning of period			10,375				9				3,442				3,631				(2,540	)			14,917		Year ended December 29, 2012

	Cash—End of period		$	21,685			$	7			$	2,681			$	4,723			$	(8,294	)		$	20,802
																												Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
																												Materials,				Wholly-				owned				Guarantors
	Condensed Consolidating Statements of Cash Flows																											LLC				owned				Guarantors
	For the six months ended June 29, 2013																											(Parent)				Guarantor
																										Net cash provided by operating activities		$	4,845			$	12,806			$	36,649			$	8,217			$	(238	)		$	62,279

			Issuers				Non-Wholly-owned				Wholly-				Non-				Elim-				Consol-			Cash flow from investing activities:
							Guarantor				owned				Guarantors				inations				idated			Acquisitions, net of cash acquired			—				—				(48,757	)			—				—				(48,757	)
											Guarantors															Purchase of property, plant and equipment			(762	)			(12,174	)			(31,818	)			(734	)			—				(45,488	)
	Net cash (used in) provided by operating activities		$	(28	)		$	(12,542	)		$	(39,989	)		$	4,799			$	—			$	(47,760	)	Proceeds from the sale of property, plant, and equipment			—				69				8,577				190				—				8,836
																										Other			—				—				69				—				—				69

	Cash flow from investing activities:																									Net cash used for investing activities			(762	)			(12,105	)			(71,929	)			(544	)			—				(85,340	)
	Acquisitions, net of cash acquired			—				—				(60,779	)			—				—				(60,779	)
	Purchase of property, plant and equipment			(766	)			(15,214	)			(23,514	)			(1,034	)			—				(40,528	)	Cash flow from financing activities
	Proceeds from the sale of property, plant, and equipment			—				—				7,086				—				—				7,086		Net proceeds from debt issuance			713,378				(17	)			—				—				—				713,361
																										Loans received from and payments made on loans from other Summit Companies			(25,371	)			(295	)			39,783				(8,793	)			(5,324	)			—
	Net cash used for investing activities			(766	)			(15,214	)			(77,207	)			(1,034	)			—				(94,221	)	Payments on long-term debt			(697,438	)			—				—				—				—				(697,438	)
																										Payments on acquisition-related liabilities			—				—				(7,519	)			—				—				(7,519	)
																										Other			(656	)			—				—				(284	)			238				(702	)
	Cash flow from financing activities:
	Net proceeds from debt issuance			189,681				—				—				—				—				189,681		Net cash (used for) provided by financing activities			(10,087	)			(312	)			32,264				(9,077	)			(5,086	)			7,702
	Loans received from and payments made on loans from other Summit Companies			(124,587	)			27,367				100,970				(4,338	)			588				—
	Payments on long-term debt			(61,343	)			—				—				—				—				(61,343	)	Net decrease (increase) in cash			(6,004	)			389				(3,016	)			(1,404	)			(5,324	)			(15,359	)
	Payments on acquisition-related liabilities			—				—				(3,426	)			—				—				(3,426	)	Cash—Beginning of period			6,701				8				33,997				2,084				—				42,790
	Financing costs			(2,707	)			—				—				—				—				(2,707	)
																										Cash—End of period		$	697			$	397			$	30,981			$	680			$	(5,324	)		$	27,431
Net cash provided by (used for) financing activities			1,044				27,367				97,544				(4,338	)			588				122,205

																									Condensed Consolidating Statements of Cash Flows
Net (decrease) increase in cash			250				(389	)			(19,652	)			(573	)			588				(19,776	)	Year ended December 31, 2011

Cash—Beginning of period			697				397				30,981				680				(5,324	)			27,431
																											Summit				Non-				Wholly-				Non-				Eliminations				Consolidated
Cash—End of period		$	947			$	8			$	11,329			$	107			$	(4,736	)		$	7,655				Materials,				Wholly-				owned				Guarantors
																											LLC				owned				Guarantors
																											(Parent)				Guarantor
																									Net cash provided by operating activities		$	(824	)		$	3,808			$	17,262			$	2,586			$	421			$	23,253

																									Cash flow from investing activities:
																									Acquisitions, net of cash acquired			—				—				(161,073	)			—				—				(161,073	)
																									Purchase of property, plant and equipment			(11	)			(5,933	)			(31,210	)			(1,502	)			—				(38,656	)
																									Proceeds from the sale of property, plant, and equipment			—				168				6,880				109				—				7,157
																									Proceeds from the sale of investments			—				—				377				(136	)			—				241
																									Cash contribution to affiliates			(135,530	)			—				—				—				135,530				—

																									Net cash used for investing activities			(135,541	)			(5,765	)			(185,026	)			(1,529	)			135,530				(192,331	)

																									Cash flow from financing activities
																									Proceeds from investment by member			103,630				—				135,530				421				(135,951	)			103,630
																									Net proceeds from debt issuance			—				36,456				60,292				—				—				96,748
																									Payments on long-term debt			—				(34,500	)			(14,500	)			—				—				(49,000	)
																									Payments on acquisition-related liabilities			—				—				(4,593	)			—				—				(4,593	)
																									Other			—				—				—				(10	)			—				(10	)

																									Net cash (used for) provided by financing activities			103,630				1,956				176,729				411				(135,951	)			146,775

																									Net decrease (increase) in cash			(32,735	)			(1	)			8,965				1,468				—				(22,303	)
																									Cash—Beginning of period			39,436				9				25,032				616				—				65,093

																									Cash—End of period		$	6,701			$	8			$	33,997			$	2,084			$	—			$	42,790

Supplementary_Data_Unaudited_T

Supplementary Data (Unaudited) (Tables)	12 Months Ended
Supplementary Data (Unaudited) (Tables)	Dec. 28, 2013
Supplemental Financial Information	'
	Supplemental financial information (unaudited) by quarter is as follows for the years ended 2013 and 2012:


		2013											2012
		4Q			3Q		2Q			1Q			4Q			3Q		2Q			1Q
	Revenue	$	238,267		$	316,263	$	254,842		$	106,829		$	231,634		$	319,181	$	255,556		$	119,883
	Operating (loss) income		(57,742	)		37,895		13,731			(41,861	)		13,322			33,249		9,015			(40,171	)
	(Loss) income from continuing operations		(70,191	)		22,950		244			(56,154	)		433			19,656		(5,621	)		(61,499	)
	Loss (income) from discontinued operations		271			160		(26	)		123			535			1,287		2,221			(497	)
	Net (loss) income	$	(70,462	)	$	22,790	$	270		$	(56,277	)	$	(102	)	$	18,369	$	(7,842	)	$	(61,002	)
Continental Cement Company, L.L.C. [Member]	'
Supplemental Financial Information	'
	Supplemental financial information (unaudited) by quarter is as follows for the years ended December 28, 2013 and December 31, 2012:


		2013											2012
	(in thousands)	4Q			3Q		2Q			1Q			4Q			3Q		2Q			1Q
	Revenues	$	22,509		$	34,155	$	27,224		$	12,361		$	25,304		$	30,430	$	26,141		$	13,007
	Operating income (loss)		9,259			10,965		9,053			(8,449	)		7,625			7,124		9,097			(4,468	)
	Net income (loss)	$	6,668		$	8,157	$	6,272		$	(11,232	)	$	4,694		$	3,977	$	5,999		$	(8,045	)

Accrued_Expenses_Tables

Accrued Expenses (Tables)	6 Months Ended						12 Months Ended
Accrued Expenses (Tables)	Jun. 28, 2014						Dec. 28, 2013
Accrued Expenses	'						'
	Accrued expenses consist of the following as of June 28, 2014 and December 28, 2013:


			June 28,		December 28,
			2014		2013
	Interest		$	27,633	$	16,456
	Payroll and benefits			16,066		16,368
	Capital lease obligations			13,528		2,068
	Insurance			8,212		7,445
	Taxes (1)			6,084		4,168
	Professional fees			2,177		2,352
	Other (2)			14,213		8,394

	Total		$	87,913	$	57,251


		-1	Consists primarily of real estate, personal property and sales taxes.
		-2	Consists primarily of subcontractor, management fee and working capital settlement accruals.
Continental Cement Company, L.L.C. [Member]	'						'
Accrued Expenses	'						'

	Accrued expenses consist of the following as of June 28, 2014 and December 28, 2013:						Accrued expenses and other liabilities consist of the following as of year-end 2013 and 2012:



			June 28, 2014		December 28, 2013			2013		2012
	Accrued interest due to Summit Materials		$	3,806	$	3,848	Accrued interest due to Summit Materials	$	3,848	$	4,283
	Accrued post-retirement benefits other than pensions, current portion			1,268		1,268	Accrued interest due to noncontrolling interest		723		2,149
	Accrued bonus liability			326		884	Accrued post-retirement benefits other than pensions, current portion		1,268		1,055
	Accrued payroll, insurance and benefits			793		758	Accrued professional fees		340		400
	Accrued interest due to noncontrolling member			—		723	Accrued payroll, insurance and benefits		758		897
	Accrued professional fees			269		340	Accrued bonus liability		884		1,153
	Accrued costs to remove barge from waterway			380		880	Accrued costs to remove barge from waterway		880		850
	Other			1,624		1,296	Other		1,296		736

	Total		$	8,466	$	9,997	Total	$	9,997	$	11,523

Summary_of_Organization_and_Si3

Summary of Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)

3 Months Ended

6 Months Ended

12 Months Ended

0 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

Jun. 28, 2014

Mar. 29, 2014

Jun. 29, 2013

Mar. 30, 2013

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

31-May-10

Jan. 17, 2014

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Jun. 28, 2014

Jun. 29, 2013

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Customer

State

Customer

Class A Units [Member]

Class B Units [Member]

Series of Individually Immaterial Business Acquisitions [Member]

Senior Secured Credit Facility, Revolver [Member]

Level 3 [Member]

Observable Inputs (Level 2) [Member]

Sales [Member]

Continental Cement Company, L.L.C. [Member]

Ohio Valley Asphalt, LLC [Member]

Minimum [Member]

Maximum [Member]

State

Customer

Sales [Member]

Reporting_Unit

Sales [Member]

Segment

Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]

Number of operating states

Percentage of owned subsidiary

100.00%

Number of operating segment

Redeemable noncontrolling interest percentage

30.30%

30.00%

20.00%

Ownership investment percentage

20.00%

50.00%

Customer accounted revenue

10.00%

18.00%

16.00%

13.00%

14.00%

Number of customers accounted for more than 10% of total revenue

Net loss from asset dispositions

$76,000

($5,574,000)

($12,419,000)

($2,564,000)

($2,349,000)

Impairment charges

Inflation rate

2.50%

Amortization expense

800,000

600,000

500,000

Discount rate

8.40%

11.00%

Adjustments to the fair value of contingent consideration

400,000

10,300,000

Fair value of deferred consideration

46,900,000

28,300,000

23,400,000

Fair value of noncompete obligations

6,900,000

4,200,000

7,400,000

Fair value of long-term debt

990,800,000

696,500,000

670,700,000

Carrying value of long-term debt

942,510,000

662,987,000

927,800,000

663,000,000

639,800,000

Revolving credit facility, fair value

26,000,000

Contingent consideration obligations - current

746,000

2,500,000

Contingent consideration obligations - non-current

1,908,000

3,600,000

1,900,000

Increase in contingent consideration liability

4,200,000

Fair value of earn-out obligations

6,100,000

1,900,000

Increase in deferred consideration and noncompete obligation related to acquisition

21,300,000

Economic interest of redeemable noncontrolling interest

100.00%

69.70%

70.00%

Value of goodwill

317,323,000

127,038,000

179,120,000

153,375,000

16,120,000

26,230,000

24,096,000

Number of reporting unit for annual impairment analysis

Goodwill impairment charges

Impairment

$68,202,000

Summary_of_Organization_and_Si4

Summary of Organization and Significant Accounting Policies - Estimated Useful Lives of Assets (Detail)	12 Months Ended
	Dec. 28, 2013
Minimum [Member] \| Buildings and Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'7 years
Minimum [Member] \| Buildings and Improvements [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'30 years
Minimum [Member] \| Plants, Machinery and Equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'3 years
Minimum [Member] \| Plants, Machinery and Equipment [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'3 years
Minimum [Member] \| Truck and Auto Fleet [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'3 years
Minimum [Member] \| Mobile Equipment and Barges [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'3 years
Minimum [Member] \| Mobile Equipment and Barges [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'3 years
Minimum [Member] \| Landfill Airspace and Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'5 years
Minimum [Member] \| Other [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'3 years
Maximum [Member] \| Buildings and Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'40 years
Maximum [Member] \| Buildings and Improvements [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'40 years
Maximum [Member] \| Plants, Machinery and Equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'40 years
Maximum [Member] \| Plants, Machinery and Equipment [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'40 years
Maximum [Member] \| Truck and Auto Fleet [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'10 years
Maximum [Member] \| Mobile Equipment and Barges [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'20 years
Maximum [Member] \| Mobile Equipment and Barges [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'20 years
Maximum [Member] \| Landfill Airspace and Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'60 years
Maximum [Member] \| Other [Member] \| Continental Cement Company, L.L.C. [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life	'7 years

Summary_of_Organization_and_Si5

Summary of Organization and Significant Accounting policies - Intangible Assets by Type and in Total (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	'	$17,340	$9,960
Accumulated Amortization	-2,577	-2,193	-1,354
Net Carrying Amount	'	15,147	8,606
Leases [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	'	10,430	8,940
Accumulated Amortization	'	-1,604	-1,092
Net Carrying Amount	'	8,826	7,848
Reserve Rights [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	'	5,890	'
Accumulated Amortization	'	-221	'
Net Carrying Amount	'	5,669	'
Trade Names [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	'	1,020	1,020
Accumulated Amortization	'	-368	-262
Net Carrying Amount	'	$652	$758

Summary_of_Organization_and_Si6

Summary of Organization and Significant Accounting Policies - Estimated Amortization Expense for Intangible Assets (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
Accounting Policies [Abstract]	'	'	'
2014	'	$897	'
2015	'	897	'
2016	'	897	'
2017	'	893	'
2018	'	893	'
Thereafter	'	10,670	'
Total	$15,275	$15,147	$8,606

Summary_of_Organization_and_Si7

Summary of Organization and Significant Accounting Policies - Assets and Liabilities Measured at Fair Value (Detail) (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Accounting Policies [Abstract]	'	'
Current portion of contingent consideration	'	$746
Contingent consideration	$1,908	$1,908

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)

Jun. 28, 2014

Jan. 17, 2014

Dec. 28, 2013

Dec. 29, 2012

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Jan. 17, 2014

In Millions, unless otherwise specified

Senior Notes [Member]

2013 Acquisitions [Member]

2012 Acquisitions [Member]

2014 Acquisitions [Member]

Central Region [Member]

West Region [Member]

Central Region [Member]

West Region [Member]

East Region [Member]

West Region [Member]

East Region [Member]

West Region [Member]

Senior Notes [Member]

Business Acquisition [Line Items]

Business acquisition date

1-Apr-13

29-Feb-12

30-Nov-12

5-Oct-12

31-Mar-14

9-Jun-14

17-Jan-14

Debt instrument, face amount

$510

$260

$250

$260

Interest rate

10.50%

Acquisitions_Supplemental_Pro_

Acquisitions - Supplemental Pro Forma Information of Acquisitions (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Business Combinations [Abstract]	'	'
Revenue	$916,201	$976,797
Net loss	($103,679)	($45,976)

Acquisitions_Summary_of_Fair_V

Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Series of Individually Immaterial Business Acquisitions [Member]	Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Financial assets	'	'	'	'	$8,302	$1,397
Inventories	'	'	'	'	3,954	6,988
Property, plant and equipment	'	'	'	'	40,580	21,543
Other assets	'	'	'	'	52	1,330
Intangible assets	'	'	'	'	7,428	3,172
Financial liabilities	'	'	'	'	-6,164	-944
Other long-term liabilities	'	'	'	'	-1,050	-364
Net assets acquired	'	'	'	'	53,102	33,122
Goodwill	317,323	127,038	179,120	153,375	16,120	26,230
Total purchase price	'	'	'	'	69,222	59,352
Noncash transactions:	'	'	'	'	'	'
Acquisition related liabilities	'	'	'	'	-7,902	-10,547
Other	'	'	'	'	281	-48
Total noncash transactions	'	'	'	'	-7,621	-10,595
Net cash paid for acquisitions	'	'	'	'	$61,601	$48,757

Acquisitions_Summary_of_Fair_V1

Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
	Dec. 28, 2013	Reserve Rights [Member]	Leases [Member]
Business Acquisition [Line Items]	'	'	'
Acquired intangible assets weighted average life	'18 years	'20 years	'11 years
Aggregate reserves	$5.90	'	'

Goodwill_Additional_Informatio

Goodwill - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
	Unit	Dec. 29, 2012	Dec. 31, 2011
Goodwill [Line Items]	'	'	'
Total number of reporting units	8	'	'
Weightage for DCF valuation and market assessment to estimate fair value of operating unit	50.00%	'	'
Discount rate	8.40%	'	'
Goodwill impairment	$68,202,000	'	'
Impairment charges recognized	$0	$0	$0
Goodwill [Member]	'	'	'
Goodwill [Line Items]	'	'	'
Discount rate	11.00%	'	'

Goodwill_Changes_in_Carrying_A

Goodwill - Changes in Carrying Amount of Goodwill, by Reportable Segment (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
Goodwill [Line Items]	'	'	'
Beginning Balance	$127,038	$179,120	$153,375
Acquisitions	190,285	16,120	25,745
Goodwill impairment	'	-68,202	'
Ending Balance	317,323	127,038	179,120
Central Region [Member]	'	'	'
Goodwill [Line Items]	'	'	'
Beginning Balance	72,789	72,789	53,585
Acquisitions	'	'	19,204
Goodwill impairment	'	'	'
Ending Balance	72,789	72,789	72,789
West Region [Member]	'	'	'
Goodwill [Line Items]	'	'	'
Beginning Balance	54,249	91,393	91,598
Acquisitions	164,125	16,120	-205
Goodwill impairment	'	-53,264	'
Ending Balance	218,374	54,249	91,393
East Region [Member]	'	'	'
Goodwill [Line Items]	'	'	'
Beginning Balance	'	14,938	8,192
Acquisitions	26,160	'	6,746
Goodwill impairment	'	-14,938	'
Ending Balance	$26,160	'	$14,938

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 29, 2012
Discontinued Operations And Disposal Groups [Abstract]	'
Sale of railroad construction, repair business and environmental business	$3.10

Discontinued_Operations_Revenu

Discontinued Operations - Revenue and Loss before Income Tax Expense from Discontinued Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Discontinued Operations And Disposal Groups [Abstract]	'	'	'
Total revenue	$3,884	$50,152	$49,537
Loss from discontinued operations before income tax expense	$528	$3,546	$5,201

Accounts_Receivable_Net_Summar

Accounts Receivable, Net - Summary of Accounts Receivable, Net (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Trade accounts receivable	$131,026	$85,188	$88,637	'	'	'
Retention receivables	14,185	15,966	13,181	'	'	'
Receivables from related parties	1,262	202	1,871	'	'	'
Accounts receivable	146,473	101,356	103,689	15,083	7,383	10,052
Less: Allowance for doubtful accounts	-2,705	-2,019	-3,391	-244	-30	-128
Accounts receivable, net	143,768	99,337	100,298	14,839	7,353	9,924
Trade accounts receivable from unaffiliated entities	'	'	'	13,455	6,961	8,859
Trade accounts receivable from related parties	'	'	'	$1,628	$422	$1,193

Inventories_Components_of_Inve

Inventories - Components of Inventories (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Inventory [Line Items]	'	'	'	'	'	'
Aggregate stockpiles	$80,232	$70,300	$62,872	'	'	'
Finished goods	14,104	11,207	9,342	8,968	6,807	4,350
Work in process	4,629	2,623	2,679	4,629	2,623	2,248
Raw materials	20,206	12,302	18,084	972	972	475
Total	$119,171	$96,432	$92,977	$14,569	$10,402	$7,073

Recovered_Sheet1

Property, Plant and Equipment, Net - Components of Property, Plant and Equipment (Detail) (USD $)

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Jun. 28, 2014

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 31, 2012

In Thousands, unless otherwise specified

Continental Cement Company, L.L.C. [Member]

Land (Mineral Bearing) and Asset Retirement Costs [Member]

Land (Non-Mineral Bearing) [Member]

Buildings and Improvements [Member]

Plants, Machinery and Equipment [Member]

Truck and Auto Fleet [Member]

Landfill Airspace and Improvements [Member]

Construction in Progress [Member]

Other [Member]

Mobile Equipment and Barges [Member]

Continental Cement Company, L.L.C. [Member]

Property, Plant and Equipment [Line Items]

Property, plant and equipment, gross

$1,044,160

$969,920

$342,904

$316,722

$107,007

$106,135

$16,524

$15,449

$81,331

$69,560

$4,605

$77,535

$78,168

$40,795

$40,681

$680,942

$623,949

$247,681

$231,454

$19,165

$19,399

$46,841

$29,560

$20,734

$23,394

$15,301

$1,779

$5,134

$1,845

$1,373

$8,060

$7,859

Less accumulated depreciation, depletion and amortization

-246,098

-212,382

-156,313

-43,353

-36,700

-25,056

Property, plant and equipment, net

$920,513

$831,778

$813,607

$309,671

$306,204

$291,666

Recovered_Sheet2

Property, Plant and Equipment, Net - Additional Information (Detail) (USD $)	12 Months Ended				12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jun. 28, 2014	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Capital Leases for Equipment and Building [Member]	Capital Leases for Equipment and Building [Member]
Property, Plant and Equipment [Line Items]	'	'	'	'	'	'	'	'	'	'
Depreciation, depletion and amortization expense	$71,400,000	$68,600,000	$61,800,000	'	$11,600,000	$10,300,000	$9,800,000	'	'	'
Property, plant and equipment, net	831,778,000	813,607,000	'	920,513,000	306,204,000	291,666,000	'	309,671,000	11,300,000	3,100,000
Less accumulated depreciation, depletion and amortization	212,382,000	156,313,000	'	246,098,000	36,700,000	25,056,000	'	43,353,000	1,300,000	200,000
Capital leases, accrued expenses obligations	'	'	'	'	'	'	'	'	2,100,000	'
Future minimum rental commitments year one	2,100,000	'	'	'	'	'	'	'	'	'
Future minimum rental commitments year two	1,100,000	'	'	'	'	'	'	'	'	'
Future minimum rental commitments year three	2,900,000	'	'	'	'	'	'	'	'	'
Future minimum rental commitments year four	400,000	'	'	'	'	'	'	'	'	'
Future minimum rental commitments year five	400,000	'	'	'	'	'	'	'	'	'
Underground mine development costs	'	'	'	'	$22,900,000	$6,600,000	'	'	'	'

Debt_Schedule_of_Debt_Detail

Debt - Schedule of Debt (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012
Debt Instrument [Line Items]	'	'	'
Revolver	$65,000	$26,000	'
Long-term debt:	'	'	'
Long-term debt, total	942,510	662,987	'
Current portion of long-term debt	4,220	4,220	4,000
Long-term debt	938,290	658,767	635,843
Total	'	662,987	639,843
Senior Secured Credit Facility [Member]	'	'	'
Long-term debt:	'	'	'
Long-term debt, total	'	417,016	394,540
Credit Facility [Member]	'	'	'
Long-term debt:	'	'	'
Long-term debt, total	415,191	417,016	'
Senior Notes [Member]	'	'	'
Long-term debt:	'	'	'
Long-term debt, total	$527,319	$245,971	$245,303

Debt_Schedule_of_Debt_Parenthe

Debt - Schedule of Debt (Parenthetical) (Detail) (USD $)

Jun. 28, 2014

Jan. 17, 2014

Dec. 28, 2013

Dec. 29, 2012

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

In Millions, unless otherwise specified

Senior Notes [Member]

Senior Secured Credit Facility [Member]

Senior Secured Credit Facility, Revolver [Member]

Credit Facility [Member]

Debt Instrument [Line Items]

Revolving senior secured credit facility due date

'2017

Long-term debt, face value

$510

$260

$250

$422

$419.90

$150

$417.80

Original issuance discount

$17.30

$4.70

$2.90

$3.50

$2.60

$2.90

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

0 Months Ended

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Jan. 31, 2012

Jun. 28, 2014

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Jan. 31, 2012

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Jan. 17, 2014

Jan. 31, 2012

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jan. 17, 2014

LIBOR [Member]

Federal Funds Rate [Member]

LIBOR Rate Plus [Member]

Term Loan Credit Facility [Member]

Senior Secured Credit Facility, Revolver [Member]

Senior Secured Credit Facility [Member]

Letter of Credit [Member]

Senior Notes [Member]

Uncommitted Incremental Facility [Member]

First Lien Net Leverage Ratio - April 1, 2012 through June 30, 2014 [Member]

First Lien Net Leverage Ratio - July 1, 2014 to June 30, 2015 [Member]

First Lien Net Leverage Ratio - Thereafter [Member]

Interest Coverage Ratio - January 1, 2013 to December 31, 2014 [Member]

Interest Coverage Ratio - Thereafter [Member]

Senior Notes (Additional Notes) [Member]

Federal Funds Rate [Member]

LIBOR [Member]

Base Rate [Member]

LIBOR Rate Plus [Member]

Senior Secured Credit Facility [Member]

Federal Funds Rate [Member]

LIBOR [Member]

Base Rate [Member]

LIBOR Rate Plus [Member]

Maximum [Member]

Minimum [Member]

Debt Instrument [Line Items]

Accrued interest on long term debt

$27,400,000

$17,100,000

$19,700,000

Debt instrument, face amount

150,000,000

422,000,000

419,900,000

510,000,000

250,000,000

260,000,000

250,000,000

Interest rate

10.50%

Maturity date

30-Jan-19

31-Jan-20

Maximum borrowing capacity

422,000,000

62,200,000

422,000,000

Original issuance discount

6,903,000

9,500,000

Debt instrument financing fees

9,500,000

Commencement of interest payments

31-Jul-12

Quarterly principal repayments percentage

0.25%

Frequency of periodic payment

'Term Debt on the last business day of each March, June, September and December.

'Term debt due on the last business day of each March, June, September and December.

Additional borrowing

25,000,000

282,800,000

Change in interest rate

-1.00%

Write-off of costs from extinguishment of debt

3,100,000

Line of credit facility additional borrowing capacity

135,000,000

Basis spread on variable rate

3.25%

0.50%

1.00%

0.50%

3.50%

2.50%

1.00%

0.50%

1.00%

3.75%

Line of credit facility minimum interest rate

2.25%

1.25%

Interest rate - Revolving credit commitments, minimum interest rate

2.75%

Effective interest rate

4.40%

5.00%

Credit facility revolving commitments

150,000,000

Maturity date of debt instrument

30-Jan-17

Outstanding letters of credit

65,000,000

26,000,000

22,800,000

18,300,000

Remaining borrowing capacity

105,700,000

First lien leverage ratio

4.75

4.5

4.25

Interest coverage ratio, maximum

1.7

1.85

Percentage of owned subsidiary

100.00%

Deferred financing fees, net

16,300,000

11,500,000

12,600,000

Premium of debt instrument

14,730,000

22,800,000

Interest expense

$36,500,000

$24,600,000

Debt_Schedule_of_Contractual_P

Debt - Schedule of Contractual Payments Long-Term Debt (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Jan. 31, 2012	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Jan. 31, 2012	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Long Term Debt Maturities Repayments Of Principal [Line Items]	'	'	'	'	'	'
2014	'	$4,220	'	'	$1,018	'
2015	'	4,220	'	'	1,018	'
2016	'	5,275	'	'	1,273	'
2017	'	4,220	'	'	1,018	'
2018	'	3,165	'	'	764	'
Thereafter	'	648,790	'	'	150,517	'
Total	927,780	669,890	'	155,100	155,608	156,400
Less: Original issue discount	'	-6,903	-9,500	'	'	'
Total debt	$942,510	$662,987	'	'	'	'

Members_Interest_Additional_in

Member's Interest - Additional information (Detail)	12 Months Ended
	Dec. 28, 2013	Dec. 31, 2012
	Directors	Directors
Limited Partners' Capital Account [Line Items]	'	'
Number of directors	6	'
Continental Cement Company, L.L.C. [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Number of directors	7	'
Directors to be appointed	4	4
Directors to be appointed by noncontrolling interest members	3	3
Anticipated redemption date	'2016-05	'
Class A Units [Member] \| Continental Cement Company, L.L.C. [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Member's equity, issued	100	100
Member's equity, outstanding	100	100
Economic interest percentage of classes of capital units	70.00%	'
Interest on capital contributions	11.00%	'
Class B Units [Member] \| Continental Cement Company, L.L.C. [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Member's equity, issued	100,000,000	100,000,000
Member's equity, outstanding	100,000,000	100,000,000
Economic interest percentage of classes of capital units	30.00%	'

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax (Benefit) Expense (Detail) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Provision for income taxes:	'	'	'	'	'
Current	'	'	$1,761	($452)	$5,382
Deferred	-525	-2,969	-4,408	-3,468	-1,974
Income tax (benefit) expense	($1,460)	($3,347)	($2,647)	($3,920)	$3,408

Income_Taxes_Schedule_of_Incom

Income Taxes - Schedule of Income Tax Provision (Benefit) (Detail) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'	'	'
Income tax benefit at federal statutory tax rate	'	'	($37,160)	($19,074)	($6,895)
Book loss not subject to income tax	'	'	32,801	16,167	13,790
State and local income taxes	'	'	130	-90	666
Depletion expense	'	'	-411	-377	-372
Domestic production activities deduction	'	'	'	'	-273
Goodwill impairment	'	'	1,046	'	'
Bargain purchase gain	'	'	'	'	-4,250
Effective rate change	'	'	'	-532	627
Valuation allowance	'	'	729	36	-360
Other	'	'	218	-50	475
Income tax (benefit) expense	($1,460)	($3,347)	($2,647)	($3,920)	$3,408

Income_Taxes_Components_of_Net

Income Taxes - Components of Net Deferred Income Tax Liability (Detail) (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Deferred tax assets (liabilities):	'	'
Mining reclamation reserve	$1,502	$1,449
Accelerated depreciation	-33,146	-34,733
Net operating loss	2,227	2,134
Capital losses on securities	997	989
Landfill closure reserve	-63	-30
Working capital (e.g., accrued compensation, prepaid assets)	2,399	3,101
Deferred tax liabilities, net	-26,084	-27,090
Less valuation allowance on loss carryforwards	-1,826	-1,025
Total	-27,910	-28,115
Other current assets	2,316	2,275
Other noncurrent liability	-30,226	-30,390
Total	($27,910)	($28,115)

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Taxes [Line Items]	'	'	'
Capital loss, carried back	'	'	$800,000
Capital loss, tax benefit recovery	'	'	300,000
Capital loss, not expected to be utilized prior to expiration	'	'	1,000,000
Net operating loss carryforwards for federal income tax purposes	5,200,000	'	'
Net operating loss carryforwards for state income tax purposes	700,000	'	'
Income tax expense or benefit recognized in other comprehensive loss	0	0	0
Uncertain tax positions	$0	'	'
Federal and State Jurisdiction [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Operating loss carryforwards, expiry year	'2033	'	'
Minimum [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Tax years open subject to audit	'2010	'	'
Maximum [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Tax years open subject to audit	'2013	'	'

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)

12 Months Ended

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Pension_Plan

Level 3 [Member]

Equity Securities [Member]

Fixed Income Securities [Member]

Cash [Member]

Precious Metals [Member]

Continental Cement Company, L.L.C. [Member]

Minimum [Member]

Maximum [Member]

Pension Benefits [Member]

Other Benefits [Member]

Pension_Plan

Level 3 [Member]

Equity Securities [Member]

Fixed Income Securities [Member]

Cash [Member]

Precious Metals [Member]

Continental Cement Company, L.L.C. [Member]

Defined Benefit Plan Disclosure [Line Items]

Expense for defined contribution plans

$2,300,000

$2,200,000

$1,900,000

$500,000

$400,000

$300,000

Number of noncontributory defined benefit pension plans

Effective date of plan amended to eliminate

1-Jan-14

Actuarial loss expected to be amortized from AOCI

100,000

200,000

Assumed health care cost trend rates

7.00%

9.00%

Target allocation

30.00%

63.00%

5.00%

2.00%

30.00%

63.00%

5.00%

2.00%

Defined benefit plan fair value of investments

Expected contribution to plans

$1,000,000

$1,300,000

Employee_Benefit_Plans_Obligat

Employee Benefit Plans - Obligations and Funded Status (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Pension Benefits [Member]	Pension Benefits [Member]	Pension Benefits [Member]	Pension Benefits [Member]	Pension Benefits [Member]	Pension Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]
				Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]				Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Change in benefit obligations:	'	'	'	'	'	'	'	'	'	'	'	'
Beginning of period	$28,674	$26,514	'	$28,674	$26,514	'	$15,810	$14,467	'	$15,810	$14,467	'
Service cost	295	276	275	295	276	275	236	207	227	236	207	227
Interest cost	963	1,055	1,161	963	1,055	1,161	513	585	710	513	585	710
Actuarial (gain) loss	-2,674	2,347	'	-2,674	2,347	'	-1,048	1,597	'	-1,048	1,597	'
Special termination benefits	'	'	'	'	'	'	39	'	'	39	'	'
Benefits paid	-1,614	-1,518	'	-1,614	-1,518	'	-1,395	-1,046	'	-1,395	-1,046	'
End of period	25,644	28,674	26,514	25,644	28,674	26,514	14,155	15,810	14,467	14,155	15,810	14,467
Change in fair value of plan assets:	'	'	'	'	'	'	'	'	'	'	'	'
Beginning of period	17,863	16,639	'	17,863	16,639	'	'	'	'	'	'	'
Actual return on plan assets	1,512	1,205	'	1,512	1,205	'	'	'	'	'	'	'
Employer contributions	1,313	1,537	'	1,313	1,537	'	1,395	1,046	'	1,395	1,046	'
Benefits paid	-1,614	-1,518	'	-1,614	-1,518	'	-1,395	-1,046	'	-1,395	-1,046	'
End of period	19,074	17,863	16,639	19,074	17,863	16,639	'	'	'	'	'	'
Funded status of plans	-6,570	-10,811	'	-6,570	-10,811	'	-14,155	-15,810	'	-14,155	-15,810	'
Current liabilities	'	'	'	'	'	'	-1,268	-1,055	'	-1,268	-1,055	'
Noncurrent liabilities	-6,570	-10,811	'	-6,570	-10,811	'	-12,887	-14,755	'	-12,887	-14,755	'
Liability recognized	-6,570	-10,811	'	-6,570	-10,811	'	-14,155	-15,810	'	-14,155	-15,810	'
Amounts recognized in accumulated other comprehensive income:	'	'	'	'	'	'	'	'	'	'	'	'
Net actuarial loss	4,831	8,056	'	4,831	8,056	'	4,139	5,501	'	4,139	5,501	'
Prior service cost	'	'	'	'	'	'	-1,346	-1,526	'	-1,346	-1,526	'
Total amount recognized	$4,831	$8,056	'	$4,831	$8,056	'	$2,793	$3,975	'	$2,793	$3,975	'

Employee_Benefit_Plans_Amounts

Employee Benefit Plans - Amounts Recognized in Other Comprehensive (Gain) Loss (Detail) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Continental Cement Company, L.L.C. [Member]

Pension Benefits [Member]

Other Benefits [Member]

Continental Cement Company, L.L.C. [Member]

Amounts recognized in other comprehensive (gain) loss:

Net actuarial (gain) loss

($2,838)

$2,444

$4,066

($2,838)

$2,444

$4,066

($1,048)

$1,597

$3,390

($1,048)

$1,597

$3,390

Prior service cost

180

-1,705

180

-1,705

Amortization of prior year service cost

180

Amortization of (gain) loss

-387

-261

-5

-387

-261

-5

-314

-312

-71

-314

-312

-71

Total amount recognized

($2,164)

($4,407)

$3,648

$5,675

($2,164)

($4,407)

$3,648

$5,675

($3,225)

$2,183

$4,061

($3,225)

$2,183

$4,061

($1,182)

$1,465

$1,614

($1,182)

$1,465

$1,614

Employee_Benefit_Plans_Compone

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Pension Benefits [Member]	Pension Benefits [Member]	Pension Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
							Pension Benefits [Member]	Pension Benefits [Member]	Pension Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]	Other Benefits [Member]
Components of net periodic benefit cost:	'	'	'	'	'	'	'	'	'	'	'	'
Service cost	$295	$276	$275	$236	$207	$227	$295	$276	$275	$236	$207	$227
Interest cost	963	1,055	1,161	513	585	710	963	1,055	1,161	513	585	710
Amortization of loss	387	262	5	314	312	69	387	262	5	314	312	69
Expected return on plan assets	-1,348	-1,301	-1,400	'	-180	'	-1,348	-1,301	-1,400	'	-180	'
Special termination benefits	'	'	'	39	'	'	'	'	'	39	'	'
Amortization of prior service credit	'	'	'	-180	'	'	'	'	'	-180	'	'
Net periodic benefit cost	$297	$292	$41	$922	$924	$1,006	$297	$292	$41	$922	$924	$1,006

Employee_Benefit_Plans_Weighte

Employee Benefit Plans - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail)

12 Months Ended

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 31, 2012

Pension Benefits [Member]

Other Benefits [Member]

Continental Cement Company, L.L.C. [Member]

Minimum [Member]

Maximum [Member]

Continental Cement Company, L.L.C. [Member]

Defined Benefit Plan Disclosure [Line Items]

Discount rate

4.21%

3.30%

4.21%

3.30%

4.46%

3.57%

4.46%

3.57%

4.33%

3.41%

4.33%

3.41%

Expected long-term rate of return on plan assets

7.50%

8.50%

7.50%

8.50%

Expected long-term rate of return on plan assets

7.50%

Employee_Benefit_Plans_Weighte1

Employee Benefit Plans - Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost (Detail)

12 Months Ended

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Pension Benefits [Member]

Other Benefits [Member]

Continental Cement Company, L.L.C. [Member]

Minimum [Member]

Maximum [Member]

Continental Cement Company, L.L.C. [Member]

Defined Benefit Plan Disclosure [Line Items]

Discount rate

3.30%

3.89%

4.94%

3.30%

3.89%

4.94%

3.57%

4.07%

5.12%

3.57%

4.07%

5.12%

3.41%

4.00%

5.07%

3.41%

4.00%

5.07%

Expected long-term rate of return on plan assets

7.50%

8.50%

7.50%

8.50%

Employee_Benefit_Plans_Effects

Employee Benefit Plans - Effects of One Percentage-Point Change in Assumed Health Care Cost Trend Rates (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 31, 2012
	Dec. 28, 2013	Dec. 29, 2012	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Total service cost and interest cost components, Increase	$66	$73	$66	$73
Estimated APBO, Increase	1,251	1,555	1,251	1,555
Total service cost and interest cost components, Decrease	-55	-63	-55	-63
Estimated APBO, Decrease	($1,073)	($1,331)	($1,073)	($1,331)

Employee_Benefit_Plans_Fair_Va

Employee Benefit Plans - Fair Value of Company's Pension Plans' Assets (Detail) (Pension Benefits [Member], USD $)	Dec. 28, 2013	Dec. 31, 2012	Dec. 29, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 31, 2012	Dec. 29, 2012	Dec. 31, 2011
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	$19,074	'	$17,863	$16,639
Fixed Income Securities [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	19,074	'	17,863	'
Fixed Income Securities [Member] \| Intermediate - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,647	'	1,247	'
Fixed Income Securities [Member] \| Intermediate - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	3,138	'	4,402	'
Fixed Income Securities [Member] \| Short Term - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	2,168	'	2,038	'
Fixed Income Securities [Member] \| Short Term - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	4,040	'	3,123	'
Equity Securities [Member] \| U.S. Large Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,221	'	1,063	'
Equity Securities [Member] \| U.S. Large Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,536	'	1,037	'
Equity Securities [Member] \| U.S. Mid Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	600	'	542	'
Equity Securities [Member] \| U.S. Mid Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	603	'	536	'
Equity Securities [Member] \| U.S. Small Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	610	'	546	'
Equity Securities [Member] \| U.S. Small Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	599	'	539	'
Equity Securities [Member] \| International [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	889	'	1,134	'
Cash [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,665	'	1,656	'
Precious Metals [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	358	'	'	'
Continental Cement Company, L.L.C. [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	19,074	17,863	17,863	16,639
Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Intermediate - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,647	1,247	'	'
Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Intermediate - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	3,138	4,402	'	'
Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Short Term - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	2,168	2,038	'	'
Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Short Term - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	4,040	3,123	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Large Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,221	1,063	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Large Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,536	1,037	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Mid Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	600	542	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Mid Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	603	536	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Small Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	610	546	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Small Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	599	539	'	'
Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| International [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	889	1,134	'	'
Continental Cement Company, L.L.C. [Member] \| Cash [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,665	1,656	'	'
Continental Cement Company, L.L.C. [Member] \| Precious Metals [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	358	'	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fixed Income Securities [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	8,081	'	7,053	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| U.S. Large Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,221	'	1,063	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| U.S. Large Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,536	'	1,037	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| U.S. Mid Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	600	'	542	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| U.S. Mid Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	603	'	536	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| U.S. Small Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	610	'	546	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| U.S. Small Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	599	'	539	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities [Member] \| International [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	889	'	1,134	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Cash [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,665	'	1,656	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Precious Metals [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	358	'	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	8,081	7,053	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Large Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,221	1,063	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Large Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,536	1,037	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Mid Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	600	542	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Mid Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	603	536	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Small Cap Value [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	610	546	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| U.S. Small Cap Growth [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	599	539	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Equity Securities [Member] \| International [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	889	1,134	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Cash [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,665	1,656	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Continental Cement Company, L.L.C. [Member] \| Precious Metals [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	358	'	'	'
Observable Inputs (Level 2) [Member] \| Fixed Income Securities [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	10,993	'	10,810	'
Observable Inputs (Level 2) [Member] \| Fixed Income Securities [Member] \| Intermediate - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,647	'	1,247	'
Observable Inputs (Level 2) [Member] \| Fixed Income Securities [Member] \| Intermediate - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	3,138	'	4,402	'
Observable Inputs (Level 2) [Member] \| Fixed Income Securities [Member] \| Short Term - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	2,168	'	2,038	'
Observable Inputs (Level 2) [Member] \| Fixed Income Securities [Member] \| Short Term - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	4,040	'	3,123	'
Observable Inputs (Level 2) [Member] \| Continental Cement Company, L.L.C. [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	10,993	10,810	'	'
Observable Inputs (Level 2) [Member] \| Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Intermediate - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	1,647	1,247	'	'
Observable Inputs (Level 2) [Member] \| Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Intermediate - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	3,138	4,402	'	'
Observable Inputs (Level 2) [Member] \| Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Short Term - Government [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	2,168	2,038	'	'
Observable Inputs (Level 2) [Member] \| Continental Cement Company, L.L.C. [Member] \| Fixed Income Securities [Member] \| Short Term - Corporate [Member]	'	'	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'	'	'
Total fair value	$4,040	$3,123	'	'

Employee_Benefit_Plans_Estimat

Employee Benefit Plans - Estimated Benefit Payments (Detail) (USD $)	Dec. 28, 2013
In Thousands, unless otherwise specified	Dec. 28, 2013
Pension Benefits [Member]	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'
2014	$1,694
2015	1,704
2016	1,739
2017	1,737
2018	1,774
2019 - 2023	8,667
Total	17,315
Pension Benefits [Member] \| Continental Cement Company, L.L.C. [Member]	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'
2014	1,694
2015	1,704
2016	1,739
2017	1,737
2018	1,774
2019 - 2023	8,667
Total	17,315
Other Benefits [Member]	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'
2014	1,269
2015	1,109
2016	1,130
2017	963
2018	1,018
2019 - 2023	4,512
Total	10,001
Other Benefits [Member] \| Continental Cement Company, L.L.C. [Member]	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'
2014	1,269
2015	1,109
2016	1,130
2017	963
2018	1,018
2019 - 2023	4,512
Total	$10,001

Accrued_Mining_and_Landfill_Re2

Accrued Mining and Landfill Reclamation - Additional Information (Detail) (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Millions, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Asset Retirement Obligation Disclosure [Abstract]	'	'
Current portion of liabilities	$0.50	$0.40

Accrued_Mining_and_Landfill_Re3

Accrued Mining and Landfill Reclamation - Activity for Asset Retirement Obligations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Asset Retirement Obligation Disclosure [Abstract]	'	'
Beginning balance	$14,844	$13,328
Acquired obligations	286	364
Change in cost estimate	721	604
Settlement of reclamation obligations	-1,201	-77
Additional liabilities incurred	414	'
Accretion expense	717	625
Ending balance	$15,781	$14,844

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2012

Dec. 31, 2011

Jun. 29, 2013

Dec. 28, 2013

Jun. 28, 2014

Dec. 29, 2012

Jun. 28, 2014

Dec. 28, 2013

Jun. 29, 2013

Jun. 28, 2014

Dec. 28, 2013

Dec. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Loss from Catastrophes [Member]

Continental Cement Company, L.L.C. [Member]

Maximum [Member]

Loss from Catastrophes [Member]

Loss Contingencies [Line Items]

Amount funded for loss incurred by joint venture

$8.80

$4.80

Accrual recorded in other noncurrent liabilities

4.3

Recognized losses on indemnification agreement

1.9

Charge for costs to remove the barge

1.8

0.8

1.8

Charges recognized for lost product included in accrued expenses

0.9

0.4

0.9

0.4

0.9

Unapproved change orders and claims

3.2

4.8

Costs and estimated earnings in excess of billings

0.5

1.6

Other assets

2.7

3.2

Duration of commitments

'1 year

Unapproved change orders within costs in excess of billings

0.5

Unapproved change orders within accounts receivable

1.2

Unapproved change orders within other current assets

$2.30

$2.70

Terms of purchase commitments

'Less than one year

Percentage of company's employees under collective bargaining arrangements

62.00%

Collective bargaining agreements expire period

'Between 2015 and 2018

'Between 2013 and 2015

Contract expiration date

'2013

Contract term extension

'2018

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Detail) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Mar. 29, 2014

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Continental Cement Company, L.L.C. [Member]

Blackstone Management Partners L.L.C. [Member]

Continental Cement Company, L.L.C. [Member]

Noncontrolling [Member]

Summit Materials Llc [Member]

Green America Recycling Llc [Member]

Blackstone Advisory Partners L P [Member]

Continental Cement Company, L.L.C. [Member]

Related Party Transaction [Line Items]

Management fees incurred

$2,300,000

$1,200,000

$2,600,000

$2,100,000

$3,000,000

Agreement date

30-Jul-09

Purchase of equipment

2,300,000

Purchase of equipment inclusive of interest

100,000

Revenue from unconsolidated affiliates

400,000

600,000

7,900,000

8,600,000

8,114,000

6,979,000

16,578,000

16,303,000

12,269,000

6,200,000

5,100,000

12,700,000

12,500,000

9,500,000

1,900,000

4,500,000

3,800,000

2,800,000

700,000

Costs incurred in connection with several transactions with unconsolidated affiliates

200,000

700,000

Accounts receivable from affiliates

400,000

1,900,000

2,990,000

10,303,000

Accounts payable to affiliates

200,000

Sales to related parties

6,200,000

5,100,000

12,700,000

12,500,000

9,500,000

Accounts receivables due from related parties

1,628,000

422,000

1,193,000

1,200,000

200,000

1,000,000

1,200,000

200,000

1,000,000

500,000

200,000

Accounts payable to noncontrolling member

700,000

2,100,000

Accrued interest on related party settlement year

'2014

Consideration of Consolidated profit

'$300,000 or 2.0% which ever is higher

Payment for services

300,000

Percentage transaction fee on value of entity acquired

1.00%

Consideration paid / received on assets acquired / disposed

1.00%

Payments to related parties

2,300,000

Related party transactions

13,000,000

Non controlling interest owned

700,000

Assets sold to related party

2,300,000

Accrued interest due to non-controlling interest

$723,000

$2,149,000

$700,000

$2,100,000

AcquisitionRelated_Liabilities2

Acquisition-Related Liabilities - Additional Information (Detail)	12 Months Ended
	Dec. 28, 2013
Minimum [Member]	'
Business Acquisition [Line Items]	'
Period identified for deferred consideration due	'5 years
Maximum [Member]	'
Business Acquisition [Line Items]	'
Period identified for deferred consideration due	'20 years

AcquisitionRelated_Liabilities3

Acquisition-Related Liabilities - Remaining Payments Due under Noncompete and Deferred Consideration Agreements (Detail) (USD $)	Dec. 28, 2013
In Thousands, unless otherwise specified	Dec. 28, 2013
Business Combinations [Abstract]	'
2014	$10,790
2015	6,742
2016	5,950
2017	5,910
2018	5,370
Thereafter	9,963
Total scheduled payments	44,725
Present value adjustments	-12,242
Total noncompete obligations and deferred consideration	$32,483

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Detail) (USD $)	6 Months Ended		12 Months Ended			0 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jan. 30, 2012	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Cash payments:	'	'	'	'	'	'	'	'	'
Cash paid for interest	$25,881	$31,439	$52,001	$36,357	$41,790	'	$11,488	$7,353	$12,946
Income taxes	1,320	653	457	799	5,608	'	'	'	'
Non cash financing activities:	'	'	'	'	'	'	'	'	'
Proceeds on borrowings due to Summit Materials	'	'	'	'	'	156,800	'	156,842	'
Repayment by Summit Materials of long-term debt and accrued interest	'	'	'	'	'	'	'	($156,842)	'

Leasing_Arrangements_Additiona

Leasing Arrangements - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Operating Leased Assets [Line Items]	'	'	'	'	'	'
Rent expense, including short-term rentals	$4	$3.50	$4.30	$0.40	$0.50	$0.40
Royalty expense recorded in cost of revenue	$4.50	$3.90	$3.10	'	'	'

Leasing_Arrangements_Minimum_C

Leasing Arrangements - Minimum Contractual Commitments under Long-Term Operating Leases (Detail) (USD $)	Dec. 28, 2013
In Thousands, unless otherwise specified	Dec. 28, 2013
Operating Leased Assets [Line Items]	'
2014, Operating Leases	$4,034
2015, Operating Leases	3,890
2016, Operating Leases	3,098
2017, Operating Leases	2,376
2018, Operating Leases	1,983
2014, Royalty Agreements	2,044
2015, Royalty Agreements	2,065
2016, Royalty Agreements	1,974
2017, Royalty Agreements	2,047
2018, Royalty Agreements	1,434
Continental Cement Company, L.L.C. [Member]	'
Operating Leased Assets [Line Items]	'
2014, Operating Leases	378
2015, Operating Leases	341
2016, Operating Leases	325
2017, Operating Leases	291
2018, Operating Leases	$291

Redeemable_Noncontrolling_Inte1

Redeemable Noncontrolling Interest - Additional Information (Detail)	12 Months Ended					12 Months Ended
	Dec. 28, 2013	Jun. 28, 2014	Dec. 28, 2013	Jun. 28, 2014	31-May-10	Dec. 28, 2013	31-May-10
		Class A Units [Member]	Class A Units [Member]	Class B Units [Member]	Class B Units [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
						Class A Units [Member]	Class B Units [Member]
Redeemable Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'
Number of class units issued	'	'	'	'	'	100	100,000,000
Economic interest of redeemable noncontrolling interest, approximately	100.00%	69.70%	70.00%	'	'	'	'
Redeemable noncontrolling interest percentage, approximately	'	'	'	30.30%	30.00%	'	'
Priority return percentage	'	'	'	'	'	11.00%	'
Allowable sharing percentage in distributions and liquidation proceeds	'	'	'	'	'	80.00%	'
Anticipated redemption date of the instrument	'2016-05	'	'	'	'	'	'

Employee_Long_Term_Incentive_P2

Employee Long Term Incentive Plan - Additional Information (Detail) (USD $)	12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
The estimated fair value	$2,200,000	'	'
Dividend yield	0.00%	'	'
Share-based compensation expense	2,300,000	2,500,000	2,500,000
Unrecognized compensation cost	4,600,000	'	'
Weighted average remaining contractual term	'2 years 7 months 6 days	'	'
Class D Units [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Cumulative amount of units vested	$2,531	$1,732	'
Dividend yield	'	'	'
Class D Units [Member] \| Time-Vesting Interests [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Units vesting on first anniversary	20.00%	'	'
Units vesting monthly following the first anniversary	80.00%	'	'
Number of years required for remaining units to be vested under vesting condition	'4 years	'	'
Period for non vested units for automatic forfeiture without consideration	'8 years	'	'
Fair value of time-vesting units	584	1,100	3,400
Weighted-average grant-date fair value	$2,786	$3,761	$3,876

Employee_Long_Term_Incentive_P3

Employee Long Term Incentive Plan - Summary of Information for Class D Unit Interests (Detail) (Class D Units [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Time-Vesting Interests [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Number of units, Beginning balance	1,692	'	'
Number of units, Granted	584	1,100	3,400
Number of units, Vested	-772	'	'
Number of units, Forfeited	-2	'	'
Number of units, Cancelled	-61	'	'
Number of units, Ending balance	1,441	1,692	'
Weighted average grant-date fair value, Beginning balance	$3,864	'	'
Weighted average grant-date fair value, Granted	$2,786	$3,761	$3,876
Weighted average grant-date fair value, Vested	$3,896	'	'
Weighted average grant-date fair value, Forfeited	$3,893	'	'
Weighted average grant-date fair value, Cancelled	$2,208	'	'
Weighted average grant-date fair value, Ending balance	'	$3,864	'
Performance-Vesting Interests [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Number of units, Beginning balance	4,202	'	'
Number of units, Granted	759	'	'
Number of units, Forfeited	-5	'	'
Number of units, Cancelled	-79	'	'
Number of units, Ending balance	4,877	'	'
Weighted average grant-date fair value, Beginning balance	$3,087	'	'
Weighted average grant-date fair value, Granted	$2,314	'	'
Weighted average grant-date fair value, Vested	$0	'	'
Weighted average grant-date fair value, Forfeited	$3,176	'	'
Weighted average grant-date fair value, Cancelled	$1,388	'	'
Weighted average grant-date fair value, Ending balance	'	'	'

Employee_Long_Term_Incentive_P4

Employee Long Term Incentive Plan - Weighted Average Assumptions Used to Estimate the Fair Value of Grants (Detail)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Class D Units	'	'	'
Dividend yield	0.00%	'	'
Class D Units [Member]	'	'	'
Class D Units	'	'	'
Risk-free interest rate, Minimum	'	'	1.71%
Risk-free interest rate	0.50%	1.62%	'
Risk-free interest rate, Maximum	'	'	2.39%
Dividend yield	'	'	'
Volatility rate, Minimum	'	'	42.00%
Volatility	58.00%	47.00%	'
Volatility rate, Maximum	'	'	49.00%
Expected term	'4 years	'	'
Class D Units [Member] \| Minimum [Member]	'	'	'
Class D Units	'	'	'
Expected term	'	'6 years	'6 years
Class D Units [Member] \| Maximum [Member]	'	'	'
Class D Units	'	'	'
Expected term	'	'8 years	'8 years

Segment_Information_Additional

Segment Information - Additional Information (Detail)	6 Months Ended	12 Months Ended
	Jun. 28, 2014	Dec. 28, 2013
	Segment	Segment
Segment Reporting [Abstract]	'	'
Number of operating segments	3	3

Segment_Information_Summary_of

Segment Information - Summary of Financial Data for Company's Reportable Business Segments (Detail) (USD $)

3 Months Ended

6 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 28, 2013

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 29, 2012

Jun. 30, 2012

Mar. 31, 2012

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Segment Reporting Information [Line Items]

Total revenue

$238,267

$316,263

$254,842

$106,829

$231,634

$319,181

$255,556

$119,883

$475,386

$361,671

$916,201

$926,254

$789,076

Total capital expenditures

49,260

40,528

65,999

45,488

38,656

Income (loss) from continuing operations before taxes

-40,676

-59,257

-105,798

-50,951

-1,441

Interest expense

40,470

27,849

56,443

58,079

47,784

Depreciation, depletion, amortization and accretion

40,695

36,026

72,934

68,290

61,377

Goodwill impairment

68,202

Total assets

1,247,794

1,281,213

1,617,640

1,247,794

1,281,213

1,284,265

Central Region [Member]

Segment Reporting Information [Line Items]

Goodwill impairment

West Region [Member]

Segment Reporting Information [Line Items]

Goodwill impairment

53,264

East Region [Member]

Segment Reporting Information [Line Items]

Goodwill impairment

14,938

Operating Segments [Member]

Segment Reporting Information [Line Items]

Total capital expenditures

46,829

39,762

62,639

44,725

38,645

Depreciation, depletion, amortization and accretion

40,053

35,982

72,468

68,209

61,290

Total assets

1,233,451

1,262,721

1,589,488

1,233,451

1,262,721

1,276,376

Operating Segments [Member] | Aggregates [Member]

Segment Reporting Information [Line Items]

Total revenue

91,365

68,304

159,019

146,991

116,082

Operating Segments [Member] | Asphalt [Member]

Segment Reporting Information [Line Items]

Total revenue

99,082

75,208

76,211

77,676

69,664

Operating Segments [Member] | Ready Mixed Concrete [Member]

Segment Reporting Information [Line Items]

Total revenue

113,769

46,412

112,878

100,941

94,302

Operating Segments [Member] | Cement [Member]

Segment Reporting Information [Line Items]

Total revenue

33,387

30,914

219,811

242,458

182,952

Operating Segments [Member] | Construction and Paving [Member]

Segment Reporting Information [Line Items]

Total revenue

478,280

505,189

464,866

Operating Segments [Member] | Paving and Related Services [Member]

Segment Reporting Information [Line Items]

Total revenue

199,420

171,946

Operating Segments [Member] | Central Region [Member]

Segment Reporting Information [Line Items]

Total revenue

156,659

128,680

329,621

302,113

264,008

Total capital expenditures

23,372

19,826

33,030

20,996

20,078

Income (loss) from continuing operations before taxes

28,400

19,182

72,918

65,767

65,651

Depreciation, depletion, amortization and accretion

18,351

16,329

33,808

30,215

27,646

Total assets

657,421

610,003

694,582

657,421

610,003

587,341

Operating Segments [Member] | West Region [Member]

Segment Reporting Information [Line Items]

Total revenue

267,130

179,719

426,195

484,922

362,577

Total capital expenditures

17,924

14,194

21,856

14,993

9,256

Income (loss) from continuing operations before taxes

32,541

28,607

14,429

36,442

Depreciation, depletion, amortization and accretion

14,414

12,291

24,167

23,771

19,706

Total assets

383,544

428,115

659,071

383,544

428,115

451,017

Operating Segments [Member] | East Region [Member]

Segment Reporting Information [Line Items]

Total revenue

51,597

53,272

160,385

139,219

162,491

Total capital expenditures

5,533

5,742

7,753

8,736

9,311

Income (loss) from continuing operations before taxes

-1,406

-2,377

15,134

10,782

15,504

Depreciation, depletion, amortization and accretion

7,288

7,362

14,493

14,223

13,938

Total assets

192,486

224,603

235,835

192,486

224,603

238,018

Corporate and Other [Member]

Segment Reporting Information [Line Items]

Total capital expenditures

2,431

766

3,360

763

Income (loss) from continuing operations before taxes

-19,046

-12,272

-24,878

-15,560

-9,877

Depreciation, depletion, amortization and accretion

642

466

Total assets

14,343

18,492

28,152

14,343

18,492

7,889

Operating Segment and Corporate and Other [Member]

Segment Reporting Information [Line Items]

Income (loss) from continuing operations before taxes

40,489

4,618

91,781

75,418

107,720

Segment Reconciling Items [Member]

Segment Reporting Information [Line Items]

Interest expense

40,470

27,849

56,443

58,079

47,784

Depreciation, depletion, amortization and accretion

40,695

36,026

72,934

68,290

61,377

Goodwill impairment

68,202

Other [Member]

Segment Reporting Information [Line Items]

Total revenue

($61,637)

($31,113)

($129,998)

($147,001)

($138,790)

Recovered_Sheet3

Senior Notes' Guarantor and Non-Guarantor Financial Information - Additional Information (Detail)	Dec. 28, 2013
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]	'
Percentage of ownership	100.00%

Recovered_Sheet4

Senior Notes' Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Balance Sheets (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Current assets:	'	'	'	'
Cash	$20,802	$14,917	$27,431	'
Accounts receivable, net	143,768	99,337	100,298	'
Intercompany receivables	0	'	'	'
Cost and estimated earnings in excess of billings	21,779	10,767	11,575	'
Inventories	119,171	96,432	92,977	'
Other current assets	13,235	13,181	10,068	'
Total current assets	318,755	234,634	242,349	'
Property, plant and equipment, net	920,513	831,778	813,607	'
Goodwill	317,323	127,038	179,120	153,375
Intangible assets, net	15,275	15,147	8,606	'
Other assets	45,774	39,197	37,531	'
Total assets	1,617,640	1,247,794	1,281,213	1,284,265
Current liabilities:	'	'	'	'
Current portion of debt	69,220	30,220	4,000	'
Current portion of acquisition-related liabilities	19,039	10,635	9,525	'
Accounts payable	78,244	72,104	61,634	'
Accrued expenses	87,913	57,251	49,822	'
Intercompany payables	0	'	'	'
Billings in excess of costs and estimated earnings	4,902	9,263	6,926	'
Total current liabilities	259,318	179,473	131,907	'
Long-term debt	938,290	658,767	635,843	'
Acquisition-related liabilities	40,947	23,756	23,919	'
Other noncurrent liabilities	83,415	77,480	84,266	'
Total liabilities	1,321,970	939,476	875,935	'
Redeemable noncontrolling interest	26,825	24,767	22,850	'
Redeemable members' interest	0	'	'	'
Total member's interest	268,845	283,551	382,428	'
Total liabilities, redeemable members' interest and member's interest	1,617,640	1,247,794	1,281,213	'
Summit Materials LLC (Parent) [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash	21,685	10,375	697	'
Accounts receivable, net	0	'	'	'
Intercompany receivables	264,955	38,134	14,931	'
Cost and estimated earnings in excess of billings	0	'	'	'
Inventories	0	'	'	'
Other current assets	2,791	750	25	'
Total current assets	289,431	49,259	15,653	'
Property, plant and equipment, net	5,755	3,969	1,074	'
Goodwill	0	'	'	'
Intangible assets, net	0	'	'	'
Other assets	499,692	296,494	374,581	'
Total assets	794,878	349,722	391,308	'
Current liabilities:	'	'	'	'
Current portion of debt	69,220	26,010	'	'
Current portion of acquisition-related liabilities	1,141	2,000	'	'
Accounts payable	4,517	5,455	2,745	'
Accrued expenses	25,566	12,041	6,877	'
Intercompany payables	101,411	'	'	'
Billings in excess of costs and estimated earnings	0	'	'	'
Total current liabilities	201,855	45,506	9,622	'
Long-term debt	938,290	19,587	'	'
Acquisition-related liabilities	0	85	'	'
Other noncurrent liabilities	879	959	395	'
Total liabilities	1,141,024	66,137	10,017	'
Redeemable noncontrolling interest	0	'	'	'
Redeemable members' interest	0	'	'	'
Total member's interest	-346,146	283,585	381,291	'
Total liabilities, redeemable members' interest and member's interest	794,878	349,722	391,308	'
Non-Wholly-Owned Guarantor [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash	7	9	397	'
Accounts receivable, net	12,338	4,587	7,421	'
Intercompany receivables	0	3,433	15,557	'
Cost and estimated earnings in excess of billings	0	'	'	'
Inventories	14,569	10,402	7,073	'
Other current assets	722	444	726	'
Total current assets	27,636	18,875	31,174	'
Property, plant and equipment, net	305,274	301,908	287,677	'
Goodwill	23,124	23,124	23,124	'
Intangible assets, net	592	642	742	'
Other assets	20,378	17,973	11,891	'
Total assets	377,004	362,522	354,608	'
Current liabilities:	'	'	'	'
Current portion of debt	1,018	1,018	965	'
Current portion of acquisition-related liabilities	0	'	'	'
Accounts payable	7,978	9,387	6,715	'
Accrued expenses	7,691	9,185	10,742	'
Intercompany payables	21,810	'	'	'
Billings in excess of costs and estimated earnings	0	'	'	'
Total current liabilities	38,497	19,590	18,422	'
Long-term debt	154,081	154,590	155,394	'
Acquisition-related liabilities	0	'	'	'
Other noncurrent liabilities	17,570	20,306	27,091	'
Total liabilities	210,148	194,486	200,907	'
Redeemable noncontrolling interest	0	'	'	'
Redeemable members' interest	23,750	23,450	22,850	'
Total member's interest	143,106	144,586	130,851	'
Total liabilities, redeemable members' interest and member's interest	377,004	362,522	354,608	'
Wholly-Owned Guarantors [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash	2,681	3,442	30,981	'
Accounts receivable, net	128,876	93,102	90,765	'
Intercompany receivables	33,532	30,787	9,018	'
Cost and estimated earnings in excess of billings	21,018	10,539	11,428	'
Inventories	102,293	85,372	84,555	'
Other current assets	9,645	11,715	8,447	'
Total current assets	298,045	234,957	235,194	'
Property, plant and equipment, net	602,744	518,935	517,994	'
Goodwill	293,227	102,942	155,024	'
Intangible assets, net	14,683	14,505	7,864	'
Other assets	63,234	37,535	161,442	'
Total assets	1,271,933	908,874	1,077,518	'
Current liabilities:	'	'	'	'
Current portion of debt	3,192	3,192	3,035	'
Current portion of acquisition-related liabilities	17,898	8,635	9,525	'
Accounts payable	64,426	57,142	51,179	'
Accrued expenses	62,068	37,342	38,050	'
Intercompany payables	174,376	71,556	33,396	'
Billings in excess of costs and estimated earnings	4,877	8,837	6,656	'
Total current liabilities	326,837	186,704	141,841	'
Long-term debt	482,993	484,590	480,449	'
Acquisition-related liabilities	40,947	23,671	23,919	'
Other noncurrent liabilities	64,966	56,215	56,780	'
Total liabilities	915,743	751,180	702,989	'
Redeemable noncontrolling interest	0	'	'	'
Redeemable members' interest	0	'	'	'
Total member's interest	356,190	157,694	374,529	'
Total liabilities, redeemable members' interest and member's interest	1,271,933	908,874	1,077,518	'
Non-Guarantors [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash	4,723	3,631	680	'
Accounts receivable, net	4,922	3,100	3,255	'
Intercompany receivables	0	'	'	'
Cost and estimated earnings in excess of billings	761	228	147	'
Inventories	2,309	658	1,349	'
Other current assets	375	272	2,409	'
Total current assets	13,090	7,889	7,840	'
Property, plant and equipment, net	6,740	6,966	6,862	'
Goodwill	972	972	972	'
Intangible assets, net	0	'	'	'
Other assets	1,235	1,303	1,315	'
Total assets	22,037	17,130	16,989	'
Current liabilities:	'	'	'	'
Current portion of debt	0	'	'	'
Current portion of acquisition-related liabilities	0	'	'	'
Accounts payable	3,691	1,572	2,138	'
Accrued expenses	1,180	1,223	1,015	'
Intercompany payables	890	798	6,110	'
Billings in excess of costs and estimated earnings	25	426	270	'
Total current liabilities	5,786	4,019	9,533	'
Long-term debt	0	'	'	'
Acquisition-related liabilities	0	'	'	'
Other noncurrent liabilities	0	'	'	'
Total liabilities	5,786	4,019	9,533	'
Redeemable noncontrolling interest	0	'	'	'
Redeemable members' interest	0	'	'	'
Total member's interest	16,251	13,111	7,456	'
Total liabilities, redeemable members' interest and member's interest	22,037	17,130	16,989	'
Eliminations [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash	-8,294	-2,540	-5,324	'
Accounts receivable, net	-2,368	-1,452	-1,143	'
Intercompany receivables	-298,487	-72,354	-39,506	'
Cost and estimated earnings in excess of billings	0	'	'	'
Inventories	0	'	'	'
Other current assets	-298	'	-1,539	'
Total current assets	-309,447	-76,346	-47,512	'
Property, plant and equipment, net	0	'	'	'
Goodwill	0	'	'	'
Intangible assets, net	0	'	'	'
Other assets	-538,765	-314,108	-511,698	'
Total assets	-848,212	-390,454	-559,210	'
Current liabilities:	'	'	'	'
Current portion of debt	-4,210	'	'	'
Current portion of acquisition-related liabilities	0	'	'	'
Accounts payable	-2,368	-1,452	-1,143	'
Accrued expenses	-8,592	-2,540	-6,862	'
Intercompany payables	-298,487	-72,354	-39,506	'
Billings in excess of costs and estimated earnings	0	'	'	'
Total current liabilities	-313,657	-76,346	-47,511	'
Long-term debt	-637,074	'	'	'
Acquisition-related liabilities	0	'	'	'
Other noncurrent liabilities	0	'	'	'
Total liabilities	-950,731	-76,346	-47,511	'
Redeemable noncontrolling interest	26,825	24,767	22,850	'
Redeemable members' interest	-23,750	-23,450	-22,850	'
Total member's interest	99,444	-315,425	-511,699	'
Total liabilities, redeemable members' interest and member's interest	($848,212)	($390,454)	($559,210)	'

Senior_Notes_Guarantor_and_Non2

Senior Notes' Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income (Detail) (USD $)

3 Months Ended

6 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 28, 2013

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 29, 2012

Jun. 30, 2012

Mar. 31, 2012

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Condensed Financial Statements, Captions [Line Items]

Revenue

$238,267

$316,263

$254,842

$106,829

$231,634

$319,181

$255,556

$119,883

$475,386

$361,671

$916,201

$926,254

$789,076

Cost of revenue (excluding items shown separately below)

360,437

277,916

677,052

713,346

597,654

General and administrative expenses

70,355

73,395

142,000

127,215

95,826

Goodwill impairment

68,202

Depreciation, depletion, amortization and accretion

40,695

36,026

72,934

68,290

61,377

Transaction costs

4,996

2,464

3,990

1,988

9,120

Operating (loss) income

-57,742

37,895

13,731

-41,861

13,322

33,249

9,015

-40,171

-1,097

-28,130

-47,977

15,415

25,099

Other (income) expense, net

-891

163

1,378

8,287

-21,244

Interest expense

40,470

27,849

56,443

58,079

47,784

(Loss) from continuing operations before taxes

-40,676

-59,257

-105,798

-50,951

-1,441

Income tax benefit (expense)

-1,460

-3,347

-2,647

-3,920

3,408

(Loss) income from continuing operations

-70,191

22,950

244

-56,154

433

19,656

-5,621

-61,499

-39,216

-55,910

-103,151

-47,031

-4,849

Loss (income) from discontinued operations

271

160

-26

123

535

1,287

2,221

-497

-349

528

3,546

5,201

Net (loss) income

-70,462

22,790

270

-56,277

-102

18,369

-7,842

-61,002

-38,867

-56,007

-103,679

-50,577

-10,050

Net (loss) income attributable to noncontrolling interest

-569

-1,518

3,112

1,919

695

Net (loss) income attributable to member of Summit Materials, LLC

-38,298

-54,489

-106,791

-52,496

-10,745

Comprehensive (loss) income attributable to member of Summit Materials, LLC

-37,725

-54,489

-103,706

-55,049

-15,050

Summit Materials LLC (Parent) [Member]

Condensed Financial Statements, Captions [Line Items]

Revenue

Cost of revenue (excluding items shown separately below)

General and administrative expenses

17,690

2,896

7,241

1,453

Depreciation, depletion, amortization and accretion

642

465

Operating (loss) income

-18,332

-2,940

-7,706

-89

-1,540

Other (income) expense, net

7,725

51,549

99,085

52,400

8,510

Interest expense

13,668

(Loss) from continuing operations before taxes

-39,725

-54,489

-106,791

-52,489

-10,050

Income tax benefit (expense)

-1,427

(Loss) income from continuing operations

-38,298

-54,489

-106,791

-52,494

-10,050

Loss (income) from discontinued operations

Net (loss) income

-38,298

-54,489

-106,791

-52,494

-10,050

Net (loss) income attributable to noncontrolling interest

695

Net (loss) income attributable to member of Summit Materials, LLC

-38,298

-54,489

-106,791

-52,494

-10,745

Comprehensive (loss) income attributable to member of Summit Materials, LLC

-38,298

-106,791

-52,494

-9,375

Non-Wholly-Owned Guarantor [Member]

Condensed Financial Statements, Captions [Line Items]

Revenue

35,264

32,799

80,759

81,516

70,064

Cost of revenue (excluding items shown separately below)

27,626

27,833

55,241

58,319

41,221

General and administrative expenses

3,574

5,083

7,673

6,235

3,933

Depreciation, depletion, amortization and accretion

6,777

5,532

11,378

10,093

9,697

Operating (loss) income

-2,713

-5,649

6,467

6,869

15,213

Other (income) expense, net

-1,358

-1,295

-3,737

-2,065

-61

Interest expense

5,857

5,423

10,702

12,045

14,004

(Loss) from continuing operations before taxes

-7,212

-9,777

-498

-3,111

1,270

Income tax benefit (expense)

(Loss) income from continuing operations

-7,212

-9,777

-498

-3,111

1,270

Loss (income) from discontinued operations

Net (loss) income

-7,212

-9,777

-498

-3,111

1,270

Net (loss) income attributable to noncontrolling interest

Net (loss) income attributable to member of Summit Materials, LLC

-7,212

-9,777

-498

-3,111

1,270

Comprehensive (loss) income attributable to member of Summit Materials, LLC

-6,394

3,909

-6,759

-4,405

Wholly-Owned Guarantors [Member]

Condensed Financial Statements, Captions [Line Items]

Revenue

427,717

314,895

807,921

824,796

700,916

Cost of revenue (excluding items shown separately below)

328,318

243,357

611,799

649,577

542,699

General and administrative expenses

53,521

67,296

125,778

119,645

89,011

Goodwill impairment

68,202

Depreciation, depletion, amortization and accretion

32,731

29,938

60,078

57,080

50,640

Transaction costs

3,990

1,988

9,120

Operating (loss) income

13,147

-25,696

-61,926

-3,494

9,446

Other (income) expense, net

-1,553

1,529

-3,410

6,630

-24,375

Interest expense

24,415

24,095

49,591

47,293

33,685

(Loss) from continuing operations before taxes

-9,715

-51,320

-108,107

-57,417

136

Income tax benefit (expense)

-33

-3,347

-2,647

-3,925

3,408

(Loss) income from continuing operations

-9,682

-47,973

-105,460

-53,492

-3,272

Loss (income) from discontinued operations

-349

528

3,546

5,201

Net (loss) income

-9,333

-48,070

-105,988

-57,038

-8,473

Net (loss) income attributable to noncontrolling interest

695

Net (loss) income attributable to member of Summit Materials, LLC

-9,333

-48,070

-105,988

-57,038

-9,168

Comprehensive (loss) income attributable to member of Summit Materials, LLC

-9,333

-105,988

-57,038

-13,473

Non-Guarantors [Member]

Condensed Financial Statements, Captions [Line Items]

Revenue

21,274

20,486

41,910

33,074

21,566

Cost of revenue (excluding items shown separately below)

13,362

13,235

24,401

18,582

17,204

General and administrative expenses

566

584

1,308

1,327

1,429

Depreciation, depletion, amortization and accretion

545

512

1,013

1,036

953

Operating (loss) income

6,801

6,155

15,188

12,129

1,980

Other (income) expense, net

174

274

-101

124

Interest expense

239

382

633

647

(Loss) from continuing operations before taxes

6,700

5,742

14,532

11,597

1,209

Income tax benefit (expense)

(Loss) income from continuing operations

6,700

5,742

14,532

11,597

1,209

Loss (income) from discontinued operations

Net (loss) income

6,700

5,742

14,532

11,597

1,209

Net (loss) income attributable to noncontrolling interest

Net (loss) income attributable to member of Summit Materials, LLC

6,700

5,742

14,532

11,597

1,209

Comprehensive (loss) income attributable to member of Summit Materials, LLC

6,700

14,532

11,597

1,209

Eliminations [Member]

Condensed Financial Statements, Captions [Line Items]

Revenue

-8,869

-6,509

-14,389

-13,132

-3,470

Cost of revenue (excluding items shown separately below)

-8,869

-6,509

-14,389

-13,132

-3,470

General and administrative expenses

Depreciation, depletion, amortization and accretion

Operating (loss) income

Other (income) expense, net

-5,750

-48,679

-90,834

-48,577

-5,442

Interest expense

-3,526

-1,908

-4,232

-1,892

-552

(Loss) from continuing operations before taxes

9,276

50,587

95,066

50,469

5,994

Income tax benefit (expense)

(Loss) income from continuing operations

9,276

50,587

95,066

50,469

5,994

Loss (income) from discontinued operations

Net (loss) income

9,276

50,587

95,066

50,469

5,994

Net (loss) income attributable to noncontrolling interest

-569

-1,518

3,112

1,919

-695

Net (loss) income attributable to member of Summit Materials, LLC

9,845

52,105

91,954

48,550

6,689

Comprehensive (loss) income attributable to member of Summit Materials, LLC

$9,600

$90,632

$49,645

$10,994

Senior_Notes_Guarantor_and_Non3

Senior Notes' Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Statements of Cash Flows (Detail) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'
Net cash (used for) provided by operating activities	($45,880)	($47,760)	$66,412	$62,279	$23,253
Cash flow from investing activities:	'	'	'	'	'
Acquisitions, net of cash acquired	-234,870	-60,779	-61,601	-48,757	-161,073
Purchase of property, plant and equipment	-49,260	-40,528	-65,999	-45,488	-38,656
Proceeds from the sale of property, plant, and equipment	5,985	7,086	16,085	8,836	7,157
Other	757	'	'	69	241
Proceeds from the sale of investments	'	'	'	'	241
Net cash used for investing activities	-277,388	-94,221	-111,515	-85,340	-192,331
Cash flow from financing activities:	'	'	'	'	'
Proceeds from investment by member	24,350	'	'	'	103,630
Net proceeds from debt issuance	424,750	189,681	230,817	713,361	96,748
Loans received from and payments made on loans from other Summit Companies	0	'	'	'	'
Payments on long-term debt	-109,246	-61,343	-188,424	-697,438	-49,000
Payments on acquisition-related liabilities	-4,259	-3,426	-9,801	-7,519	-4,593
Financing costs	-6,354	-2,707	'	'	'
Other	-88	'	-3	-702	-10
Net cash (used for) provided by financing activities	329,153	122,205	32,589	7,702	146,775
Net decrease (increase) in cash	5,885	-19,776	-12,514	-15,359	-22,303
Cash-beginning of period	14,917	27,431	27,431	42,790	65,093
Cash-end of period	20,802	7,655	14,917	27,431	42,790
Summit Materials LLC (Parent) [Member]	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'
Net cash (used for) provided by operating activities	-18,665	-28	-232	4,845	-824
Cash flow from investing activities:	'	'	'	'	'
Acquisitions, net of cash acquired	-181,754	'	'	'	'
Purchase of property, plant and equipment	-2,428	-766	-3,359	-762	-11
Proceeds from the sale of property, plant, and equipment	0	'	'	'	'
Other	0	'	'	'	'
Cash contribution to affiliates	'	'	'	'	-135,530
Net cash used for investing activities	-184,182	-766	-3,359	-762	-135,541
Cash flow from financing activities:	'	'	'	'	'
Proceeds from investment by member	24,350	'	'	'	103,630
Net proceeds from debt issuance	424,750	189,681	230,817	713,378	'
Loans received from and payments made on loans from other Summit Companies	-123,441	-124,587	-29,121	-25,371	'
Payments on long-term debt	-104,060	-61,343	-188,424	-697,438	'
Payments on acquisition-related liabilities	-1,000	'	'	'	'
Financing costs	-6,354	-2,707	'	'	'
Other	-88	'	-3	-656	'
Net cash (used for) provided by financing activities	214,157	1,044	13,269	-10,087	103,630
Net decrease (increase) in cash	11,310	250	9,678	-6,004	-32,735
Cash-beginning of period	10,375	697	697	6,701	39,436
Cash-end of period	21,685	947	10,375	697	6,701
Non-Wholly-Owned Guarantor [Member]	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'
Net cash (used for) provided by operating activities	-13,153	-12,542	9,003	12,806	3,808
Cash flow from investing activities:	'	'	'	'	'
Acquisitions, net of cash acquired	0	'	'	'	'
Purchase of property, plant and equipment	-11,829	-15,214	-24,896	-12,174	-5,933
Proceeds from the sale of property, plant, and equipment	0	'	3	69	168
Other	0	'	'	'	'
Net cash used for investing activities	-11,829	-15,214	-24,893	-12,105	-5,765
Cash flow from financing activities:	'	'	'	'	'
Proceeds from investment by member	0	'	'	'	'
Net proceeds from debt issuance	0	'	'	-17	36,456
Loans received from and payments made on loans from other Summit Companies	25,234	27,367	15,502	-295	'
Payments on long-term debt	-254	'	'	'	-34,500
Payments on acquisition-related liabilities	0	'	'	'	'
Financing costs	0	'	'	'	'
Other	0	'	'	'	'
Net cash (used for) provided by financing activities	24,980	27,367	15,502	-312	1,956
Net decrease (increase) in cash	-2	-389	-388	389	-1
Cash-beginning of period	9	397	397	8	9
Cash-end of period	7	8	9	397	8
Wholly-Owned Guarantors [Member]	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'
Net cash (used for) provided by operating activities	-13,412	-39,989	44,746	36,649	17,262
Cash flow from investing activities:	'	'	'	'	'
Acquisitions, net of cash acquired	-53,116	-60,779	-61,601	-48,757	-161,073
Purchase of property, plant and equipment	-34,666	-23,514	-36,629	-31,818	-31,210
Proceeds from the sale of property, plant, and equipment	5,912	7,086	16,020	8,577	6,880
Other	-409	'	'	69	'
Proceeds from the sale of investments	'	'	'	'	377
Net cash used for investing activities	-82,279	-77,207	-82,210	-71,929	-185,026
Cash flow from financing activities:	'	'	'	'	'
Proceeds from investment by member	0	'	'	'	135,530
Net proceeds from debt issuance	0	'	'	'	60,292
Loans received from and payments made on loans from other Summit Companies	104,121	100,970	19,726	39,783	'
Payments on long-term debt	-4,932	'	'	'	-14,500
Payments on acquisition-related liabilities	-3,259	-3,426	-9,801	-7,519	-4,593
Financing costs	0	'	'	'	'
Other	-1,000	'	'	'	'
Net cash (used for) provided by financing activities	94,930	97,544	9,925	32,264	176,729
Net decrease (increase) in cash	-761	-19,652	-27,539	-3,016	8,965
Cash-beginning of period	3,442	30,981	30,981	33,997	25,032
Cash-end of period	2,681	11,329	3,442	30,981	33,997
Non-Guarantors [Member]	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'
Net cash (used for) provided by operating activities	168	4,799	12,895	8,217	2,586
Cash flow from investing activities:	'	'	'	'	'
Acquisitions, net of cash acquired	0	'	'	'	'
Purchase of property, plant and equipment	-337	-1,034	-1,115	-734	-1,502
Proceeds from the sale of property, plant, and equipment	73	'	62	190	109
Other	0	'	'	'	'
Proceeds from the sale of investments	'	'	'	'	-136
Net cash used for investing activities	-264	-1,034	-1,053	-544	-1,529
Cash flow from financing activities:	'	'	'	'	'
Proceeds from investment by member	1,166	'	'	'	421
Net proceeds from debt issuance	0	'	'	'	'
Loans received from and payments made on loans from other Summit Companies	22	-4,338	-8,891	-8,793	'
Payments on long-term debt	0	'	'	'	'
Payments on acquisition-related liabilities	0	'	'	'	'
Financing costs	0	'	'	'	'
Other	0	'	'	-284	-10
Net cash (used for) provided by financing activities	1,188	-4,338	-8,891	-9,077	411
Net decrease (increase) in cash	1,092	-573	2,951	-1,404	1,468
Cash-beginning of period	3,631	680	680	2,084	616
Cash-end of period	4,723	107	3,631	680	2,084
Eliminations [Member]	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'
Net cash (used for) provided by operating activities	-818	'	'	-238	421
Cash flow from investing activities:	'	'	'	'	'
Acquisitions, net of cash acquired	0	'	'	'	'
Purchase of property, plant and equipment	0	'	'	'	'
Proceeds from the sale of property, plant, and equipment	0	'	'	'	'
Other	1,166	'	'	'	'
Cash contribution to affiliates	'	'	'	'	135,530
Net cash used for investing activities	1,166	'	'	'	135,530
Cash flow from financing activities:	'	'	'	'	'
Proceeds from investment by member	-1,166	'	'	'	-135,951
Net proceeds from debt issuance	0	'	'	'	'
Loans received from and payments made on loans from other Summit Companies	-5,936	588	2,784	-5,324	'
Payments on long-term debt	0	'	'	'	'
Payments on acquisition-related liabilities	0	'	'	'	'
Financing costs	0	'	'	'	'
Other	1,000	'	'	238	'
Net cash (used for) provided by financing activities	-6,102	588	2,784	-5,086	-135,951
Net decrease (increase) in cash	-5,754	588	2,784	-5,324	'
Cash-beginning of period	-2,540	-5,324	-5,324	'	'
Cash-end of period	($8,294)	($4,736)	($2,540)	($5,324)	'

Supplementary_Data_Unaudited_S

Supplementary Data (Unaudited) - Supplemental Financial Information (Detail) (USD $)	3 Months Ended								6 Months Ended		12 Months Ended			3 Months Ended								6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 31, 2012	Dec. 31, 2011
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Schedule Of Condensed Statements Of Operations [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Revenue	$238,267	$316,263	$254,842	$106,829	$231,634	$319,181	$255,556	$119,883	$475,386	$361,671	$916,201	$926,254	$789,076	$22,509	$34,155	$27,224	$12,361	$25,304	$30,430	$26,141	$13,007	$42,450	$39,585	$96,249	$94,882	$79,488
Operating (loss) income	-57,742	37,895	13,731	-41,861	13,322	33,249	9,015	-40,171	-1,097	-28,130	-47,977	15,415	25,099	9,259	10,965	9,053	-8,449	7,625	7,124	9,097	-4,468	3,910	603	20,828	19,378	17,022
(Loss) income from continuing operations	-70,191	22,950	244	-56,154	433	19,656	-5,621	-61,499	-39,216	-55,910	-103,151	-47,031	-4,849	'	'	'	'	'	'	'	'	'	'	'	'	'
Loss (income) from discontinued operations	271	160	-26	123	535	1,287	2,221	-497	-349	97	528	3,546	5,201	'	'	'	'	'	'	'	'	'	'	'	'	'
Net (loss) income	($70,462)	$22,790	$270	($56,277)	($102)	$18,369	($7,842)	($61,002)	($38,867)	($56,007)	($103,679)	($50,577)	($10,050)	$6,668	$8,157	$6,272	($11,232)	$4,694	$3,977	$5,999	($8,045)	($1,973)	($4,960)	$9,865	$6,625	$2,462

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Jan. 17, 2014

Dec. 29, 2012

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Jan. 30, 2012

Jan. 17, 2014

Continental Cement Company, L.L.C. [Member]

Senior Notes [Member]

Subsequent Event [Member]

Ten Point Five Zero Percent Senior Notes Due Two Thousand Twenty [Member]

Continental Cement Company, L.L.C. [Member]

Senior Notes [Member]

Ten Point Five Zero Percent Senior Notes Due Two Thousand Twenty [Member]

Subsequent Event [Line Items]

Aggregate principal amount

$260,000,000

Debt instrument, face amount

510,000,000

250,000,000

260,000,000

250,000,000

510,000,000

250,000,000

510,000,000

250,000,000

Interest rate

10.50%

Maturity date

31-Jan-20

Senior Secured Credit Agreement was amended

16-Jan-14

Acquisition completed Date

17-Jan-14

Acquisition amount

179,250,000

Additional acquisition amount

30,750,000

Aggregate principal amount pursuant to an indenture governing, issued

927,780,000

669,890,000

155,100,000

155,608,000

156,400,000

250,000,000

Increase in principal amount of notes issued

$260,000,000

Accrued_Expenses_Components_of

Accrued Expenses - Components of Accrued Expenses and Other Liabilities (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Jun. 28, 2014	Dec. 28, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013	Dec. 29, 2012	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]	Continental Cement Company, L.L.C. [Member]
Accrued Expenses And Other Liabilities [Line Items]	'	'	'	'	'	'
Accrued interest due to Summit Materials	'	'	'	$3,806	$3,848	$4,283
Interest	27,633	16,456	'	'	'	'
Accrued interest due to noncontrolling interest	'	'	'	'	723	2,149
Payroll and benefits	16,066	16,368	'	'	'	'
Accrued post-retirement benefits other than pensions, current portion	'	'	'	1,268	1,268	1,055
Capital lease obligations	13,528	2,068	'	'	'	'
Insurance	8,212	7,445	'	'	'	'
Taxes	6,084	4,168	'	'	'	'
Accrued professional fees	2,177	2,352	'	269	340	400
Accrued payroll, insurance and benefits	'	'	'	793	758	897
Accrued bonus liability	'	'	'	326	884	1,153
Accrued costs to remove barge from waterway	'	'	'	380	880	850
Other	14,213	8,394	'	1,624	1,296	736
Total	$87,913	$57,251	$49,822	$8,466	$9,997	$11,523

Debt_Schedule_of_Contractual_P1

Debt - Schedule of Contractual Payments Long, Including Current Maturities -Term Debt (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013
In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Debt Disclosure [Abstract]	'	'
2014 (six months)	$2,110	'
2015	5,275	'
2016	4,220	'
2017	4,220	'
2018	3,165	'
2019	398,790	'
Thereafter	510,000	'
Total	927,780	669,890
Plus: Original issue net premium	14,730	'
Total debt	$942,510	$662,987

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

0 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Jun. 28, 2014

Dec. 28, 2013

Jan. 17, 2014

Dec. 29, 2012

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Jan. 31, 2012

Jun. 28, 2014

Dec. 28, 2013

Dec. 29, 2012

Jan. 30, 2012

Jun. 28, 2014

Jun. 29, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 31, 2011

Jun. 28, 2014

Dec. 28, 2013

Jan. 30, 2012

Jun. 28, 2014

Dec. 28, 2013

Jun. 28, 2014

Dec. 28, 2013

Senior Notes [Member]

Senior Secured Credit Facility, Revolver [Member]

Senior Secured Credit Facility [Member]

Continental Cement Company, L.L.C. [Member]

Senior Notes [Member]

Senior Secured Credit Facility, Revolver [Member]

Senior Secured Credit Facility [Member]

Long Term Debt Maturities Repayments Of Principal [Line Items]

Debt due to Summit Materials

$927,780,000

$669,890,000

$155,100,000

$155,608,000

$156,400,000

Interest expense

40,470,000

27,849,000

56,443,000

58,079,000

47,784,000

5,894,000

5,635,000

11,053,000

12,622,000

14,621,000

Interest rate - revolving credit commitments

3.70%

Refinance of Summit Materials consolidated outstanding indebtedness

142,700,000

Long term debt due to Summit Materials

156,800,000

156,842,000

60,300,000

95,300,000

Charge on earnings related to financing fees on debt repaid

470,000

1,629,000

3,256,000

3,266,000

2,335,000

300,000

Maturity date

31-Jan-20

30-Jan-19

31-Jan-20

30-Jan-19

Maturity date of debt instrument

30-Jan-17

Debt instrument, face amount

510,000,000

250,000,000

260,000,000

250,000,000

150,000,000

422,000,000

419,900,000

510,000,000

250,000,000

150,000,000

Maximum borrowing capacity on credit facility

62,200,000

422,000,000

Interest rate

10.50%

3.70%

Interest costs on debt

5,600,000

5,500,000

Long term debt due to Summit Materials

$109,246,000

$61,343,000

$188,424,000

$697,438,000

$49,000,000

$60,300,000

$94,800,000

$95,300,000