Acquisitions and Dispositions (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011	Jun. 30, 2011 Purchase of noncontrolling interest [Member]	Mar. 31, 2011 Purchase of noncontrolling interest [Member]	Mar. 31, 2011 Purchase of noncontrolling interest [Member] HR Ladco Holdings, LLC [Member]	Mar. 15, 2011 Purchase of noncontrolling interest [Member] Lakewood MOB, LLC [Member]	Jun. 30, 2011 Mortgage note financing [Member]	Mar. 31, 2011 Mortgage note financing [Member] Iowa [Member]	Jan. 03, 2011 Mortgage note financing [Member] Iowa [Member]	Mar. 31, 2011 Mortgage note financing [Member] Florida [Member]	Feb. 03, 2011 Mortgage note financing [Member] Florida [Member]	Jun. 30, 2011 Mortgage note financing [Member] Missouri [Member]	Mar. 24, 2011 Mortgage note financing [Member] Missouri [Member]	Jun. 30, 2011 Mortgage note financing [Member] Missouri One [Member]	Jun. 30, 2011 Mortgage note financing [Member] Oklahoma [Member]	Jun. 30, 2011 Real estate acquisitions [Member] Virginia [Member]	Jan. 03, 2011 Iowa [Member]
Asset Acquisitions
Date Acquired				Mar. 31, 2011	Mar. 15, 2011			Jan. 03, 2011		Feb. 03, 2011		Mar. 24, 2011	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2011
Cash consideration	$ 104.2	$ 1.3		$ 0.8	$ 0.5	$ 68.1		$ 40.0		$ 2.7	$ 1.4	$ 0.5	$ 11.0	$ 13.0	$ 34.8
Real Estate	32.0														32.0
Note receivable repayment	(3.5)	(3.5)	3.5	(3.5)
Mortgage note financing	68.1	0			0	68.1	40.0		2.7	2.7		1.4	11.0	13.0		40.0
Noncontrolling Interest	3.6	3.6	3.6	3.4	0.2
APIC	1.5	1.5		1.5
Other	$ 2.5	$ (0.3)		$ (0.6)	$ 0.3										$ 2.8
Square Footage	142,000														142,000