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- Definition

Impairment of Real Estate, Reserve for Capital Expenditures

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No definition available.

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- Definition

Number of Malls with Impairment

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- Definition

Number of Stores Disposed

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No definition available.

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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No definition available.

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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- Definition

The number of derivative instruments of a particular group held by the entity.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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No definition available.

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- Definition

Ratio of the net operating income produced by an asset and its capital cost (original prices paid to buy the asset), used as an input to measure fair value.

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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No definition available.

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Fair Value Measurements (Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($)	Jun. 30, 2016 USD ($) mall	Mar. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) mall outparcel anchor_store	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) derivative_instrument
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value		$ 4,890,967			$ 4,890,967		$ 4,890,967		$ 4,945,622
Mortgage and other indebtedness, net		4,540,479			4,540,479		4,540,479		4,710,628
Loss on impairment		43,493		$ 2,781	63,178	$ 2,781
Fair value of real estate investments		105,647			105,647		105,647
Long-term debt		$ 4,540,479			4,540,479		$ 4,540,479		$ 4,710,628
Outparcel Sale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment					$ 830
Number of properties disposed of \| outparcel					3
River Ridge Mall
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of equity interest in real estate property	25.00%	25.00%	25.00%		25.00%		25.00%	25.00%
River Ridge Mall \| Corporate Joint Venture
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of equity interest in real estate property	75.00%		75.00%					75.00%
Anchor Parcel at River Ridge Mall \| Corporate Joint Venture
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of equity interest in real estate property	25.00%		25.00%					25.00%
The Lakes and Fashion Square, Wausau Center, Bonita Lakes, Midland Mall and Ridge River Mall
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment					$ 62,348
Number of malls with impairment \| mall					6
The Lakes and Fashion Square
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment		$ 32,096
Number of malls with impairment \| mall		2
Fair value of real estate investments		$ 65,447			$ 65,447		$ 65,447
Sales price		66,500			66,500		$ 66,500
Percentage of total consolidated revenues							1.60%
Wausau Center
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment		10,738
Fair value of real estate investments		11,000			$ 11,000		$ 11,000
Percentage of total consolidated revenues							0.40%
Number of properties disposed of \| anchor_store					2
Holding period (up to) (in years)					10 years
Capitalization rate (as a percent)					13.25%
Discount rate (as a percent)					13.00%
Wausau Center \| Non-recourse loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt		$ 17,689			$ 17,689		$ 17,689
Bonita Lakes Mall and Crossing
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of real estate investments	$ 27,440		$ 27,440					$ 27,440
Sales price	27,910		27,910					$ 27,910
Percentage of total consolidated revenues								0.70%
Midland Mall
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment			4,681
Fair value of real estate investments	29,200		$ 29,200					$ 29,200
Percentage of total consolidated revenues								0.60%
Holding period (up to) (in years)			10 years
Capitalization rate (as a percent)			9.75%
Discount rate (as a percent)			11.50%
River Ridge Mall
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of real estate investments	$ 20,033		$ 20,033					$ 20,033
Percentage of total consolidated revenues								0.60%
Interest Rate Swap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of Instruments \| derivative_instrument									4
Bonita Lakes Mall and Crossing
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment			5,323
River Ridge Mall
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on impairment			9,510
Ownership percentage sold	75.00%				75.00%
Reserve for capital expenditures			$ 2,100