XML 39 R28.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Organization, Formation and Structure (Details) | Sep. 30, 2016 partnership property
--- | ---
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Distribution of REIT taxable income (excluding net capital gains) to its stockholders | 90.00%
Number of partnerships | partnership | 2
Shopping Centers |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of real estate properties | 49
Mixed-Use Properties |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of real estate properties | 7
Non-operating Development Properties |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of real estate properties | 3

X
- Definition Minimum Percentage of Taxable Income Distribution to Shareholders + References No definition available. + Details
Name: | bfs_MinimumPercentageOfTaxableIncomeDistributionToShareholders
Namespace Prefix: | bfs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Partnerships + References No definition available. + Details
Name: | bfs_NumberofPartnerships
Namespace Prefix: | bfs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] + References No definition available. + Details
Name: | bfs_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix: | bfs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=bfs_ShoppingCentersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=bfs_MixedUsePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=bfs_NonoperatingDevelopmentPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |