XML 66 R45.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Noncontrolling Interests - Holders of Convertible Limited Partnership Units in the Operating Partnership - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2024 shares | Dec. 31, 2023 shares | Dec. 31, 2022 shares
Leasehold Interest Contributed In Contribution Agreement |  |  |
Noncontrolling Interest [Line Items] |  |  |
Stock issued during period, shares, acquisitions | 469,740 |  |
Noncontrolling interests |  |  |
Noncontrolling Interest [Line Items] |  |  |
Limited partnership units (in shares) | 10,011,903 |  |
Limited partnership units, conversion ratio | 1 |  |
Outstanding stock percent that should be acquired for rights to be exercised | 39.90% |  |
Limited partnership units convertible to shares of common stock, eligible for conversion | 600,000 |  |
Fully converted partnership units and diluted weighted average shares outstanding | 34,500,000 | 34,100,000 | 34,000,000.0
Partners capital account units placed In escrow (in shares) | 708,035 |  |
Saul Holdings Limited Partnership |  |  |
Noncontrolling Interest [Line Items] |  |  |
Percentage of ownership in operating partnership | 69.60% |  |
Saul Holdings Limited Partnership | Noncontrolling interests |  |  |
Noncontrolling Interest [Line Items] |  |  |
Percentage of ownership interest of noncontrolling interest | 29.00% |  |
Limited partnership units, conversion ratio | 1 |  |
Third Party Investor |  |  |
Noncontrolling Interest [Line Items] |  |  |
Percentage of ownership interest of noncontrolling interest | 1.40% |  |

X
- Definition Limited Partners' Capital Account, Convertible Units, Conversion Ratio + References No definition available. + Details
Name: | bfs_LimitedPartnersCapitalAccountConvertibleUnitsConversionRatio
Namespace Prefix: | bfs_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Limited Partners' Capital Account, Convertible Units, Eligible for Conversion + References No definition available. + Details
Name: | bfs_LimitedPartnersCapitalAccountConvertibleUnitsEligibleForConversion
Namespace Prefix: | bfs_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum Outstanding Stock Percentage That Should be Acquired for Rights Issued to Become Exercisable + References No definition available. + Details
Name: | bfs_MinimumOutstandingStockPercentageThatShouldBeAcquiredForRightsIssuedToBecomeExercisable
Namespace Prefix: | bfs_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Partners' Capital Account, Units, Converted and Weighted Average Shares Outstanding, Diluted + References No definition available. + Details
Name: | bfs_PartnersCapitalAccountUnitsConvertedAndWeightedAverageSharesOutstandingDiluted
Namespace Prefix: | bfs_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partners Capital Account Units Placed In Escrow + References No definition available. + Details
Name: | bfs_PartnersCapitalAccountUnitsPlacedInEscrow
Namespace Prefix: | bfs_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482987/272-10-50-3 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of limited partner units outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_MinorityInterestLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares of stock issued during the period pursuant to acquisitions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=bfs_LeaseholdInterestContributedInContributionAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bfs_SaulHoldingsLimitedPartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bfs_ThirdPartyInvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |