Name:	sam_IncomeTaxesLineItems
Namespace Prefix:	sam_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Income Tax Return, Examination Period

+ References

No definition available.

+ Details

Name:	sam_IncomeTaxReturnExaminationPeriod
Namespace Prefix:	sam_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

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

- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

+ Details

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

- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

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

Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 28, 2014	Dec. 28, 2013	Jun. 28, 2014 State and Local Jurisdiction	Jun. 28, 2014 State and Local Jurisdiction Minimum	Jun. 28, 2014 State and Local Jurisdiction Maximum
Income Taxes [Line Items]
Unrecognized tax benefits	$ 0.4	$ 0.6
Accrued interest and penalties	$ 0.3	$ 0.3
Income tax return examination			The Company's state income tax returns remain subject to examination for three or four years depending on the state's statute of limitations.
Income tax return examination period				3 years	4 years