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Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2012 item
Discontinued Operations
Number of properties sold			5
Discontinued Operations
Rental income	$ 507	$ 1,600
Depreciation and amortization	38	249
Real estate expenses		102
Interest expense	100	332
Total expenses	138	683
Income from operations	369	917
Net gain on sales	15,050	17,254
Income from discontinued operations	$ 15,419	$ 18,171

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Amount of expense from discontinued operations, that reflects the allocation of the cost of tangible and intangible assets over the assets' useful lives.

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Amount of interest expense allocated to disposal group, including a discontinued operation.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, 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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