Investment In Real Estate Joint Ventures And Partnerships (Combined Condensed Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Investment In Real Estate Joint Ventures And Partnerships [Line Items]
Revenues, net	$ 131,681	$ 118,802
Expenses:
Depreciation and amortization	39,719	33,231
Interest, net	17,952	31,297
Operating	25,356	22,419
Real estate taxes, net	15,202	13,810
General and administrative	6,667	8,307
Provision for income taxes	(153)	(22)
Impairment loss	56	6,852
Total	87,000	84,619
Operating income	44,830	14,931
Unconsolidated Real Estate Joint Ventures [Member]
Investment In Real Estate Joint Ventures And Partnerships [Line Items]
Revenues, net	42,161	49,847
Expenses:
Depreciation and amortization	12,021	16,136
Interest, net	7,545	9,086
Operating	6,154	8,625
Real estate taxes, net	4,583	6,238
General and administrative	286	361
Provision for income taxes	62	73
Impairment loss	1,815	0
Total	32,466	40,519
Operating income	$ 9,695	$ 9,328

Depreciation of property, plant and equipment directly related to services rendered by an entity during the reporting period.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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Interest and debt related expenses associated with nonoperating financing activities of the entity.

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The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

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The aggregate revenue from real estate operations during the reporting period.

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A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land).

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The charge against earnings from continuing operations resulting from the aggregate write down of all assets from their carrying value to their fair value.

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Generally recurring costs associated with normal operations including the portion of these expenses which can be clearly related to production and in cost of sales or services. Includes selling, general and administrative expense.

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