Fair Value of the liabilities incurred by the acquirer to former owners of the acquiree, including the fair value of any contingent consideration. If liabilities transferred as consideration remain within the combined entity after the business combination (for example, because the assets or liabilities were transferred to the acquiree rather than to its former owners), and the acquirer therefore retains control of them; in that situation, the acquirer measures those liabilities at their carrying amounts immediately before the acquisition date.

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+ Details

Acquisitions of Real Estate Property (Details 4) (USD $) In Millions, unless otherwise specified		1 Months Ended			1 Months Ended		1 Months Ended		1 Months Ended
	Aug. 31, 2012	Jul. 31, 2010 Lillibridge Acquisition	Jul. 31, 2010 Lillibridge Acquisition	Jun. 30, 2010 Lillibridge Acquisition	Jul. 31, 2010 Lillibridge Acquisition 38 MOBs	Jun. 30, 2010 Lillibridge Acquisition 38 MOBs	Jul. 31, 2010 Lillibridge Acquisition 24 MOBs	Jun. 30, 2010 Lillibridge Acquisition 24 MOBs	Jul. 31, 2010 Lillibridge Acquisition 34 MOBs	Jun. 30, 2010 Lillibridge Acquisition 34 MOBs	Jun. 30, 2010 Lillibridge Acquisition Property management and other services
Business acquisition
Number of Medical office buildings		96	96		38		24		34
Purchase price of acquisition of assets	$ 380.0			$ 381.0
Assumption of debt	101.6			79.5
Acquired ownership interest in Lillibridge's services and development business (as a percent)						100.00%		20.00%		5.00%	100.00%
Number of institutional third parties holding majority interests of joint ventures				2
Repaid mortgage debt involved in acquisition				$ 132.7