Discontinued Operations and Properties Held for Sale	12 Months Ended
Discontinued Operations and Properties Held for Sale	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Properties Held for Sale	Discontinued Operations and Properties Held for Sale The Company separately classifies properties held for sale in the accompanying consolidated balance sheets and operating results for those properties as discontinued operations in the accompanying consolidated statements of operations and comprehensive loss. In the normal course of business, changes in the market may compel the Company to decide to classify a property as held for sale or reclassify a property that is designated as held for sale back to held for investment. In these situations, the property is transferred to held for sale or back to held for investment at the lesser of fair value or depreciated cost. As of December 31, 2012 and 2011, the Company held one and two vacant properties, respectively, which were classified as held for sale on the accompanying respective balance sheets. On July 1, 2012, the Company sold one of the vacant properties, which was located in Havertown, PA, for net proceeds of $0.6 million and recorded a loss on held for sale properties of $0.5 million. Additionally, in 2012, the Company recorded an impairment on assets held for sale of $0.1 million on its remaining property classified as held for sale.

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

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