Investments in Unconsolidated Joint Ventures	9 Months Ended
Investments in Unconsolidated Joint Ventures	Sep. 30, 2012
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments and Joint Ventures Disclosure [Text Block]	Investments in Unconsolidated Joint Ventures Blythe Valley JV Sarl The Company has a 20% interest in Blythe Valley JV Sarl (the "joint venture"), an entity engaged in the ownership of office properties in the West Midlands, United Kingdom. The joint venture is part of the Company's United Kingdom reporting segment. During the three months ended September 30, 2012 the joint venture recorded an impairment charge, the Company's share of which was sufficient to bring the Company's investment in the joint venture to zero. The Company's share of this impairment charge was $4.5 million and is reflected in equity in (loss) earnings of unconsolidated joint ventures in the Company's consolidated statements of operations.

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

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