Mortgage and Other Indebtedness, Net (Summary of Compliance With Key Covenant Ratios of Credit Facilities and Term Loans) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Unsecured Term Loan 2
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	$ 697,778
Line of credit, current borrowing capacity	$ 581,977
Required \| Unsecured Credit Facility and Term Loan
Debt Instrument [Line Items]
Debt to total asset value	60.00%
Total unencumbered assets to unsecured debt	60.00%
Unencumbered NOI to unsecured interest expense	175.00%
EBITDA to fixed charges (debt service)	150.00%
Actual \| Unsecured Credit Facility and Term Loan
Debt Instrument [Line Items]
Debt to total asset value	52.00%
Total unencumbered assets to unsecured debt	48.00%
Unencumbered NOI to unsecured interest expense	310.00%
EBITDA to fixed charges (debt service)	230.00%

EBITDA to Fixed Charged (Debt Service)

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- Definition

Ratio of Total Debt to Total Assets

+ References

No definition available.

+ Details

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- Definition

Total Unencumbered Assets to Unsecured Debt

+ References

No definition available.

+ Details

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- Definition

Unencumbered NOI to Unsecured Interest Expense

+ References

No definition available.

+ Details

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- 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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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- 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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