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Mortgage and Other Indebtedness, Net - Compliance with Key Covenant Ratios of Credit Facilities and Term Loans (Details) - Unsecured Credit Facility and Term Loan $ in Thousands	Sep. 30, 2018 USD ($)
Unsecured Term Loan 2
Debt Instrument [Line Items]
Remaining borrowing capacity of credit facility	$ 697,627
Current borrowing capacity of credit facility	$ 491,436
Required
Debt Instrument [Line Items]
Debt to total asset value (as a percent)	60.00%
Total unencumbered assets to unsecured debt (as a percent)	60.00%
Unencumbered NOI to unsecured interest expense (as a percent)	175.00%
EBITDA to fixed charges (debt service) (as a percent)	150.00%
Actual
Debt Instrument [Line Items]
Debt to total asset value (as a percent)	53.00%
Total unencumbered assets to unsecured debt (as a percent)	49.00%
Unencumbered NOI to unsecured interest expense (as a percent)	260.00%
EBITDA to fixed charges (debt service) (as a percent)	230.00%

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EBITDA to Fixed Charged (Debt Service)

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Ratio of Total Debt to Total Assets

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Total Unencumbered Assets to Unsecured Debt

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Unencumbered NOI to Unsecured Interest Expense

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

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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

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-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

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