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Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2012 item
Discontinued Operations
Number of properties sold		5
Discontinued Operations
Rental income	$ 550
Depreciation and amortization	110
Real estate expenses	60
Interest expense	116
Total expenses	286
Income from operations	264
Income from discontinued operations	$ 264

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Represents the number of properties sold as part of discontinued operations.

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Amount of aggregate costs and expenses attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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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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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 operating expenses attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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Amount of rental income attributable to the disposal group, including a component of the entity (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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