XML 50 R40.htm IDEA: XBRL DOCUMENT
v3.22.2

Net Income per Share - Additional Information (Detail) - shares |  |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 01, 2022 | Mar. 01, 2020 | Mar. 01, 2019 | Jan. 01, 2019 | Jun. 25, 2022 | Jun. 26, 2021 | Jun. 25, 2022 | Jun. 26, 2021 | Dec. 25, 2021
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Stock option outstanding |  |  |  |  | 218,229 |  | 218,229 |  | 221,354
Common Class A |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share |  |  |  |  | 13,000 | 20,000 | 24,000 | 13,000 |
Investment Share Program |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 5 years |  |
Investment Share Program | Minimum |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Requirement tenure of employee for investment share program, purchase shares at discount |  |  |  |  |  |  | 1 year |  |
Discount from current market value |  |  |  |  |  |  | 20.00% |  |
Investment Share Program | Maximum |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Requirement tenure of employee for investment share program, purchase shares at discount |  |  |  |  |  |  | 2 years |  |
Discount from current market value |  |  |  |  |  |  | 40.00% |  |
Restricted Stock Awards |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Vesting period | 4 years | 4 years | 4 years | 5 years |  |  |  |  |
Performance Based Awards |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Stock option outstanding |  |  |  |  | 1,348 |  | 1,348 |  |
Performance Based Awards | Common Class A |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Number of shares not included because the performance criteria was not expected to be met |  |  |  |  |  |  | 17,114 |  |
Unvested Performance-Based Stock Awards | Common Class A |  |  |  |  |  |  |  |  |
Earnings Per Share Note [Line Items] |  |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share |  |  |  |  |  |  |  | 1,348 |

X
- Definition Earnings Per Share Note [Line Items] + References No definition available. + Details
Name: | sam_EarningsPerShareNoteLineItems
Namespace Prefix: | sam_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employee tenure requirement to participate in plan. + References No definition available. + Details
Name: | sam_ShareBasedCompensationArrangementByShareBasedPaymentAwardRequiredTenureForParticipationInPlan
Namespace Prefix: | sam_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discount rate from fair value on purchase date that participants pay for shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The addition or reduction in the number of reserved shares that could potentially be issued under the option plan attributable to reasons other than grants, exercises, forfeitures, and expirations during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=sam_VoluntaryEquityInvestmentProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=sam_PerformanceBasedAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=sam_UnvestedPerformanceBasedStockAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |