Segment Information (Reconciliation Of Segment Net Operating Income To Income From Continuing Operations) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended
Feb. 29, 2012	Mar. 31, 2012	Mar. 31, 2011
Segment Information [Abstract]
Total Segment Net Operating Income		$ 85,293	$ 82,296
Depreciation and Amortization		(34,377)	(32,951)
Impairment Loss		(6,852)	(770)
General and Administrative		(8,307)	(6,536)
Interest Expense, net		(31,429)	(36,694)
Interest and Other Income, net		2,386	2,055
Gain on Sale of Real Estate Joint Venture and Partnership Interests	3,500	5,562
Equity in Earnings of Real Estate Joint Ventures and Partnerships, net		4,075	3,397
Benefit for Income Taxes		22	316
Income from Continuing Operations		$ 16,373	$ 11,113

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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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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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 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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Represents segment total revenues less (1) operating expense and (2) real estate tax expense (ad valorem taxes).

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