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Unconsolidated Joint Ventures	3 Months Ended
Unconsolidated Joint Ventures	Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments and Joint Ventures Disclosure [Text Block]	Unconsolidated Joint Ventures Cambridge Medipark Ltd During the three months ended March 31, 2017 and 2016, Cambridge Medipark, Ltd (a joint venture in which the Company holds a 50% interest) recognized gains and losses, respectively, on the sale of land leasehold interests. The Company's share of these gains/losses was a $3.0 million gain for the three months ended March 31, 2017 compared to a loss of $106,000 for the same period in 2016.