Debt instrument quarterly principal repayment percentage.

No definition available.

Name:	ck0001571371_DebtInstrumentQuarterlyPrincipalRepaymentPercentage
Namespace Prefix:	ck0001571371_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Deferred Financing Cost Net

+ References

No definition available.

+ Details

Name:	ck0001571371_DeferredFinancingCostNet
Namespace Prefix:	ck0001571371_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

First lien leverage ratio.

+ References

No definition available.

+ Details

Name:	ck0001571371_FirstLienLeverageRatio
Namespace Prefix:	ck0001571371_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest coverage ratio maximum.

+ References

No definition available.

+ Details

Name:	ck0001571371_InterestCoverageRatioMaximum
Namespace Prefix:	ck0001571371_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility Additional Borrowing Capacity

+ References

No definition available.

+ Details

Name:	ck0001571371_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix:	ck0001571371_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of credit facility amount committed.

+ References

No definition available.

+ Details

Name:	ck0001571371_LineOfCreditFacilityAmountCommitted
Namespace Prefix:	ck0001571371_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line of credit facility minimum interest rate.

+ References

No definition available.

+ Details

Name:	ck0001571371_LineOfCreditFacilityMinimumInterestRate
Namespace Prefix:	ck0001571371_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentFrequencyOfPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Expenses paid for obtaining loans which includes expenses such as application and origination fees.

+ References

No definition available.

+ Details

Name:	us-gaap_LoanProcessingFee
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=ck0001571371_SeniorSecuredCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=ck0001571371_TermLoanCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_ExistingSecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_FirstLienLeverageRatioAfterJuneThirtyTwoThousandAndFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_FirstLienLeverageRatioJanuaryFirstTwoThousandAndThirteenThroughJuneThirtyTwoThousandAndFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_FirstLienLeverageRatioJulyFirstTwothousandAndFourteenToJuneThirtyTwoThousandAndFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_InterestCoverageRatioAfterDecemberThirtyFirstTwoThousandAndFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_InterestCoverageRatioFiscalQuarterStartedThroughJanuaryFirstTwoThousandAndThirteenToDecemberThirtyFirstTwoThousandAndFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_SeniorNotesAdditionalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ck0001571371_UncommittedIncrementalFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
Debt - Additional Information (Detail) (USD $)	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012	Jan. 15, 2015	Jan. 31, 2012	Sep. 08, 2014	Jan. 17, 2014
Debt Instrument [Line Items]
Original issuance discount					$ 9,500,000
Proceeds from issuance of debt	762,250,000us-gaap_ProceedsFromIssuanceOfDebt	234,681,000us-gaap_ProceedsFromIssuanceOfDebt	726,442,000us-gaap_ProceedsFromIssuanceOfDebt
Premium of debt instrument	24,247,000
Write-off of costs from extinguishment of debt		3,100,000
Outstanding letters of credit		26,000,000us-gaap_LineOfCredit
Deferred financing fees, net	17,200,000ck0001571371_DeferredFinancingCostNet	11,500,000ck0001571371_DeferredFinancingCostNet
Subsequent Event [Member] \| Prime Rate [Member] \| COLOMBIA
Debt Instrument [Line Items]
Basis spread on variable rate				0.20%
Subsequent Event [Member] \| Prime Rate [Member] \| CANADA
Debt Instrument [Line Items]
Basis spread on variable rate				0.90%
Term Loan Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity					422,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					150,000,000
Effective interest rate	4.20%
Maturity date of debt instrument	Jan. 30, 2017
Outstanding letters of credit	0
Revolving Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Revolving Credit Facility [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility [Member] \| LIBOR Rate Plus [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Revolving Credit Facility [Member] \| Subsequent Event [Member] \| COLOMBIA
Debt Instrument [Line Items]
Revolving credit commitment				6,000,000
Revolving Credit Facility [Member] \| Subsequent Event [Member] \| CANADA
Debt Instrument [Line Items]
Revolving credit commitment				500,000
Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Mainland [Member]
Debt Instrument [Line Items]
Revolving credit commitment				400,000
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	422,000,000
Maturity date	Jan. 30, 2019
Proceeds from issuance of debt	25,000,000
Quarterly principal repayments percentage	0.25%
Frequency of periodic payment	Term debt due on the last business day of each March, June, September and December.
Change in interest rate	1.00%
Credit facility revolving commitments	150,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	126,700,000
Outstanding letters of credit	23,300,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	625,000,000	250,000,000			250,000,000	115,000,000	260,000,000
Interest rate					10.50%
Maturity date	Jan. 31, 2020
Debt instrument financing fees			9,500,000
Senior Notes (Additional Notes) [Member]
Debt Instrument [Line Items]
Proceeds from issuance of debt	409,300,000
Premium of debt instrument	34,300,000
Uncommitted Incremental Facility [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility additional borrowing capacity	135,000,000
Effective interest rate	5.00%
Uncommitted Incremental Facility [Member] \| Senior Secured Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.75%
Line of credit facility minimum interest rate	1.25%
Uncommitted Incremental Facility [Member] \| Senior Secured Credit Facility [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Uncommitted Incremental Facility [Member] \| Senior Secured Credit Facility [Member] \| LIBOR Rate Plus [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Uncommitted Incremental Facility [Member] \| Senior Secured Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Line of credit facility minimum interest rate	2.25%
Interest rate - Revolving credit commitments, minimum interest rate	2.75%
First Lien Leverage Ratio January 1, 2013 To June 30, 2014 [Member] \| Senior Secured Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
First lien leverage ratio	4.75
First Lien Net Leverage Ratio - July 1, 2014 to June 30, 2015 [Member] \| Senior Secured Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
First lien leverage ratio	4.50
First Lien Net Leverage Ratio - Thereafter [Member] \| Senior Secured Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
First lien leverage ratio	4.25
Interest Coverage Ratio - January 1, 2013 to December 31, 2014 [Member] \| Senior Secured Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest coverage ratio, maximum	1.70
Interest Coverage Ratio - Thereafter [Member] \| Senior Secured Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest coverage ratio, maximum	1.85
Existing Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 250,000,000