XML 85 R41.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Summary of Significant Accounting Policies - Construction in Progress (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Construction in progress | $ 30,261 us-gaap_DevelopmentInProcess | $ 9,867 us-gaap_DevelopmentInProcess
Park Van Ness |  |
Property, Plant and Equipment [Line Items] |  |
Construction in progress | 26,998 us-gaap_DevelopmentInProcess / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = bfs_VanNessSquareMember | 7,901 us-gaap_DevelopmentInProcess / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = bfs_VanNessSquareMember
Other |  |
Property, Plant and Equipment [Line Items] |  |
Construction in progress | $ 3,263 us-gaap_DevelopmentInProcess / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = us-gaap_OtherPropertyMember | $ 1,966 us-gaap_DevelopmentInProcess / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = us-gaap_OtherPropertyMember

X
- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_DevelopmentInProcess
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=bfs_VanNessSquareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=us-gaap_OtherPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |