Mortgage Loan Activity [Line Items]

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- Definition

Real Estate Properties Used As Collateral On Credit Facility

+ References

No definition available.

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- Definition

Revolving Facility Debt Used To Repay Mortgage Debt

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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- Definition

Amount of increase in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from new investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 6))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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- Definition

The cash outflow from the repayment of a long-term debt instrument issued, secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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Financing Activity (Mortgage Loan Activity) (Detail) $ in Thousands		1 Months Ended			12 Months Ended
	Jan. 19, 2018 USD ($)	Mar. 31, 2017 USD ($)	Apr. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2018 USD ($) Mortgages	Dec. 31, 2017 USD ($)
Mortgage Loan Activity [Line Items]
Mortgage loans payable, net					$ 1,047,906	$ 1,056,084
Mortgage Loans on Real Estate [Member]
Mortgage Loan Activity [Line Items]
Real Estate Properties Used As Collateral On Credit Facility \| Mortgages					11
Mortgage Loan [Member]
Mortgage Loan Activity [Line Items]
Debt Issuance Costs, Net					$ 3,064	$ 3,400
Woodland Mall [Member]
Mortgage Loan Activity [Line Items]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan			$ 130,000
Repayments of First Mortgage Bond			$ 141,200
Woodland Mall [Member] \| LIBOR [Member]
Mortgage Loan Activity [Line Items]
Stated Interest Rate			2.00%
Mall At Prince Georges [Member]
Mortgage Loan Activity [Line Items]
Repayments of First Mortgage Bond		$ 150,600
Revolving Facility Debt Used to Repay Mortgage Debt		$ 110,000
Francis Scott Key Mall [Member]
Mortgage Loan Activity [Line Items]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan	$ 68,500			$ 68,500
Francis Scott Key Mall [Member] \| LIBOR [Member]
Mortgage Loan Activity [Line Items]
Stated Interest Rate	2.60%
Lycoming Mall [Member]
Mortgage Loan Activity [Line Items]
Repayments of First Mortgage Bond				32,800
Viewmont Mall [Member]
Mortgage Loan Activity [Line Items]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan				$ 9,000
Mortgage loans payable, net					$ 57,000
Debt Instrument, Maturity Date				Mar. 31, 2021
Viewmont Mall [Member] \| LIBOR [Member]
Mortgage Loan Activity [Line Items]
Stated Interest Rate				2.35%
Valley Mall [Member]
Mortgage Loan Activity [Line Items]
Repayments of First Mortgage Bond				$ 79,300
Revolving Facility Debt Used to Repay Mortgage Debt				50,000
New River Valley Mall [Member]
Mortgage Loan Activity [Line Items]
Repayments of First Mortgage Bond				$ 28,100
Interest Rate Swap Member Forward Starting [Member]
Mortgage Loan Activity [Line Items]
Debt Instrument, Maturity Date	Jan. 19, 2022
Variable Rate Mortgages [Member] \| Mortgage Loans on Real Estate [Member]
Mortgage Loan Activity [Line Items]
Real Estate Properties Used As Collateral On Credit Facility \| Mortgages					3