XML 48 R38.htm IDEA: XBRL DOCUMENT
v3.20.2

Equity Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Class of Stock [Line Items] |  |  |  |
Income attributable to noncontrolling interests | $ (2,236) | $ (3,102) | $ (7,681) | $ (10,250)
Series D Cumulative Redeemable Preferred Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Depositary shares outstanding (in shares) | 3.0 |  | 3.0 |
Depository shares to cumulative redeemable preferred stock ratio |  |  | 1.00% |
Cumulative redeemable preferred stock liquidation preference (in usd per share) | $ 25.00 |  | $ 25.00 |
Annual dividend on depositary shares (in usd per share) |  |  | $ 1.53125 |
Percentage of redeemable preferred stock |  |  | 6.125% |
Series E Cumulative Redeemable Preferred Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Depositary shares outstanding (in shares) | 4.4 |  | 4.4 |
Depository shares to cumulative redeemable preferred stock ratio |  |  | 1.00% |
Cumulative redeemable preferred stock liquidation preference (in usd per share) | $ 25.00 |  | $ 25.00 |
Annual dividend on depositary shares (in usd per share) |  |  | $ 1.50 |
Percentage of redeemable preferred stock |  |  | 6.00% |

X
- Definition Depository Shares Dividends per Share + References No definition available. + Details
Name: | bfs_DepositorySharesDividendsPerShare
Namespace Prefix: | bfs_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Depository Shares to Redeemable Preferred Stock Ratio + References No definition available. + Details
Name: | bfs_DepositorySharesToRedeemablePreferredStockRatio
Namespace Prefix: | bfs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Depositary Shares Outstanding + References No definition available. + Details
Name: | bfs_PreferredStockDepositarySharesOutstanding
Namespace Prefix: | bfs_
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_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before tax, of income (loss) attributable to noncontrolling interest. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_IncomeLossAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644 + Details
Name: | us-gaap_PreferredStockLiquidationPreference
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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

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