XML 23 R29.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Organization, Formation and Structure - Additional Information (Details) | Mar. 31, 2015 partnership
--- | ---
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Distribution of REIT taxable income (excluding net capital gains) to its stockholders | 90.00%bfs_MinimumPercentageOfTaxableIncomeDistributionToShareholders
Number of partnerships | 2 bfs_NumberofPartnerships
Shopping Centers |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of real estate properties | 50 us-gaap_NumberOfRealEstateProperties / us-gaap_RealEstatePropertiesAxis = bfs_ShoppingCentersMember
Mixed-Use Properties |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of real estate properties | 6 us-gaap_NumberOfRealEstateProperties / us-gaap_RealEstatePropertiesAxis = bfs_MixedUsePropertiesMember
Non-operating Development Properties |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of real estate properties | 3 us-gaap_NumberOfRealEstateProperties / us-gaap_RealEstatePropertiesAxis = bfs_NonoperatingDevelopmentPropertiesMember

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
- 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_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: |

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