Debt Instrument, Debt Default Threshold, Minimum Loan Amount

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- Definition

Debt Instrument, Period Of Extension Option

+ References

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- Definition

Debt Instrument, Weighted Average Remaining Term to Maturity

+ References

No definition available.

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- Definition

Number of extension options available.

+ References

No definition available.

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- Definition

Number of Debt Instruments

+ 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

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

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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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.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

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- 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.

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- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

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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
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Mortgage and Other Indebtedness, Net - Narrative (Details)	1 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2018 USD ($)	Sep. 30, 2018 USD ($) extension_option loan credit_line	Dec. 31, 2017	Jun. 04, 2018 USD ($)
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		5.04%	4.74%
Principal maturities in 2018		$ 411,284,000
Principal maturities in 2020		$ 661,816,000
Weighted-average maturity period		3 years 10 months 10 days	4 years 4 months 24 days
Unsecured lines of credit
Debt Instrument [Line Items]
Number of unsecured term loans \| credit_line		3
Variable rate (as a percent)		1.55%
Annual facility fee (as a percent)		0.30%
Aggregate capacity of the three unsecured lines of credit		$ 1,100,000,000
Unsecured lines of credit \| Minimum
Debt Instrument [Line Items]
Variable rate (as a percent)		0.875%
Annual facility fee (as a percent)		0.125%
Unsecured lines of credit \| Maximum
Debt Instrument [Line Items]
Variable rate (as a percent)		1.55%
Annual facility fee (as a percent)		0.30%
Unsecured Term Loan 2
Debt Instrument [Line Items]
Variable rate (as a percent)		1.75%
Face amount of debt instrument		$ 350,000,000
Interest rate (as a percent)		3.85%
Unsecured Term Loan 1
Debt Instrument [Line Items]
Variable rate (as a percent)		2.00%
Face amount of debt instrument		$ 300,000,000
Option extension term of debt instrument		1 year
Interest rate (as a percent)		4.10%
Number of extension options available \| extension_option		2
Unsecured Term Loan 3
Debt Instrument [Line Items]
Variable rate (as a percent)		1.65%
Face amount of debt instrument		$ 45,000,000
Interest rate (as a percent)		3.75%
Operating property loan
Debt Instrument [Line Items]
Principal maturities in 2018		$ 43,716,000
Unsecured Term Loan
Debt Instrument [Line Items]
Number of unsecured term loans \| loan		1
Fixed Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		5.37%	5.37%
Variable Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		3.95%	2.90%
Unsecured Debt
Debt Instrument [Line Items]
Number of unsecured term loans \| loan		3
Senior Notes Due 2026
Debt Instrument [Line Items]
Face amount of debt instrument		$ 625,000,000
Senior Notes Due 2026 \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		5.95%	5.95%
Senior Notes Due 2024
Debt Instrument [Line Items]
Face amount of debt instrument		$ 300,000,000
Senior Notes Due 2024 \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		4.60%	4.60%
Unsecured lines of credit \| Variable Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		3.65%	2.56%
Non-recourse loans on operating properties
Debt Instrument [Line Items]
Face amount of debt instrument				$ 43,716,000
Default minimum of debt instrument		$ 50,000,000
Non-recourse loans on operating properties \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		5.33%	5.33%
Non-recourse loans on operating properties \| Variable Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		0.00%	3.37%
Recourse loans on operating properties
Debt Instrument [Line Items]
Default minimum of debt instrument		$ 150,000,000
Recourse loans on operating properties \| Variable Rate Interest
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		4.73%	4.00%
Principal amortization
Debt Instrument [Line Items]
Principal maturities in 2018		$ 17,568,000
Cary Towne Center \| Unsecured Term Loan
Debt Instrument [Line Items]
Principal maturities in 2018		$ 350,000,000
Hickory Point Mall
Debt Instrument [Line Items]
Amount financed	$ 27,446,000