Debt Instrument, Amortization Period

No definition available.

Name:	bfs_DebtInstrumentAmortizationPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Payment At Maturity

+ References

No definition available.

+ Details

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Namespace Prefix:	bfs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number Of Interest Rate Swaps

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of accumulated amortization of debt issuance costs.

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Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Period Type:	instant

- 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

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Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

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Balance Type:	debit
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payment on derivative.

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Period Type:	instant

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Period Type:	instant

- Definition

Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

No definition available.

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- Definition

Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Period Type:	duration

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Period Type:

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Notes Payable, Bank Credit Facility, Interest and Amortization of Deferred Debt Costs - Narrative (Details)		3 Months Ended
	Mar. 08, 2023 USD ($)	Mar. 31, 2023 USD ($)	Oct. 01, 2030	Oct. 01, 2027	Dec. 31, 2022 USD ($)	Aug. 23, 2022 USD ($) swap
Debt Instrument [Line Items]
Revolving credit facility payable, net		$ 192,134,000			$ 161,941,000
Number of interest rate swaps \| swap						2
Long-term debt		1,250,948,000
Principal amount		1,266,563,000			1,240,000,000
Debt outstanding with fixed-rate		1,070,000,000.00			1,070,000,000.00
Debt outstanding with variable-rate		194,000,000			164,000,000
Carrying value of properties collateralizing mortgage notes		1,040,000,000.00			1,040,000,000.00
Unamortized deferred debt costs		15,615,000			15,800,000
Debt issuance costs amortization		8,300,000			$ 7,900,000
Interest Rate Swap
Debt Instrument [Line Items]
Derivative asset		1,900,000
Broadlands Village Mortgage
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure		3,600,000
Long-term debt		28,600,000
Avenel Business Park
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure		6,300,000
The Waycroft Mortgage
Debt Instrument [Line Items]
Guarantor obligations, maximum exposure		23,600,000
Twinbrook Quarter
Debt Instrument [Line Items]
Unamortized deferred debt costs		2,600,000
Hampden House
Debt Instrument [Line Items]
Unamortized deferred debt costs		$ 2,900,000
Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate spread on LIBOR		0.10%
Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Interest rate spread on LIBOR		1.40%
Term Facility \| LIBOR
Debt Instrument [Line Items]
Interest rate spread on LIBOR		1.35%
Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity		$ 188,600,000
Revolving credit facility payable, net		294,000,000
Letter of Credit
Debt Instrument [Line Items]
Revolving credit facility payable, net		185,000
Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		525,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		425,000,000
Line of Credit \| Term Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		100,000,000
Line of Credit \| Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility payable, net		194,000,000
Secured Debt \| Term Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 100,000,000
Secured Debt \| Term Loan \| Agreement Ending October 1, 2027
Debt Instrument [Line Items]
Derivative, notional amount						50,000,000
Secured Debt \| Term Loan \| Agreement Ending October 1, 2030
Debt Instrument [Line Items]
Derivative, notional amount						$ 50,000,000
Secured Debt \| Secured Overnight Financing Rate (SOFR) \| Term Loan \| Agreement Ending October 1, 2027 \| Forecast
Debt Instrument [Line Items]
Derivative, fixed interest rate				2.96%
Secured Debt \| Secured Overnight Financing Rate (SOFR) \| Term Loan \| Agreement Ending October 1, 2030 \| Forecast
Debt Instrument [Line Items]
Derivative, fixed interest rate			2.91%
Mortgages
Debt Instrument [Line Items]
Repayments of debt	$ 9,300,000
Mortgages \| BJ’s Wholesale Club
Debt Instrument [Line Items]
Long-term debt, term	10 years
Debt instrument, face amount	$ 15,300,000
Debt instrument, interest rate, stated percentage	6.07%
Debt instrument, periodic payment	$ 99,200
Amortization period	25 years
Debt instrument, payment at maturity	$ 11,700,000
Mortgages \| Avenel Business Park
Debt Instrument [Line Items]
Long-term debt		22,600,000
Mortgages \| The Waycroft Mortgage
Debt Instrument [Line Items]
Long-term debt		151,800,000
Mortgages \| Ashbrook Marketplace Mortgage
Debt Instrument [Line Items]
Long-term debt		20,700,000
Mortgages \| Kentlands Place Mortgage
Debt Instrument [Line Items]
Long-term debt		$ 28,000,000