The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for assets of a disposal group, including a component of the entity (discontinued operation), to be sold or that has been disposed of through sale, as of the financial statement date.

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Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items before deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Liability (such as a mortgage) related to a disposal group that is held for sale and anticipated to be sold in less than one year. The liability is expected to be discharged as part of the plan of sale for the asset.

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Cash received for the sale of real estate that is not part of an investing activity during the current period.

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Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Total revenues	$ 9,744	$ 20,163	$ 36,486	$ 61,883
Total expenses	6,061	18,830	25,723	58,508
Operating Income from Discontinued Operations	3,683	1,333	10,763	3,375
Net gain on extinguishment of debt	0	0
Disposal Group Including Discontinued Operation Litigation Loss Accruals Impairments		(5,000)	0	(15,056)
Income (loss) from discontinued operations	3,683	(3,667)	146,293	(11,681)
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	253,352		253,352		519,285
Liabilities related to discontinued operations	8,954		8,954		267,652
Other real estate [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Cash Sale of Real Estate			40,990
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Net gains on sale of real estate	0		5,761
Washington DC1140 Connecticut Avenue [Member]
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	0		0		36,271
Liabilities related to discontinued operations	0		0		18,948
Washington DC1227 Twenty Fifth Street [Member]
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	0		0		43,630
Liabilities related to discontinued operations	0		0		0
High Point Complex [Member]
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Net gain on extinguishment of debt			83,907	0
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	0		0		154,563
Liabilities related to discontinued operations	0		0		236,974
Retail Properties [Member]
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	83,019		83,019		121,837
Liabilities related to discontinued operations	7,826		7,826		11,730
Washington DC 1140 Connecticut Avenue and 1227 Twenty Fifth Street [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Cash Sale of Real Estate			127,000
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Net gains on sale of real estate			45,862
West Mart 350 [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Square Footage Of Real Estate Property			1,200,000
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	170,333		170,333		162,984
Liabilities related to discontinued operations	$ 1,128		$ 1,128		$ 0