Acquisitions and Dispositions (Details 3) (USD $)	3 Months Ended		6 Months Ended							3 Months Ended							6 Months Ended	1 Months Ended					3 Months Ended			6 Months Ended	3 Months Ended	6 Months Ended					6 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2011	Dec. 31, 2010	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] Oklahoma [Member]	Jun. 30, 2011 Woolfolk Medical Group LLC [Member]	Mar. 31, 2011 Iowa [Member] HR Ladco Holdings, LLC [Member]	Mar. 31, 2011 HR Ladco Holdings, LLC [Member]	Mar. 31, 2011 Colorado [Member] Lakewood MOB, LLC [Member]	Mar. 31, 2011 Lakewood MOB, LLC [Member]	Jan. 03, 2011 Iowa [Member]	Mar. 31, 2011 Florida [Member]	Mar. 31, 2011 Maryland [Member]	Dec. 31, 2010 Michigan and Indiana [Member]	Jun. 30, 2011 Michigan and Indiana [Member]	Mar. 31, 2011 Missouri [Member]	Jun. 30, 2011 Missouri [Member]	Jun. 30, 2011 Oklahoma [Member]	Mar. 31, 2011 7.7% Mortgage loan [Member]	Mar. 31, 2011 7.0% Mortgage Loan [Member]	Mar. 31, 2011 11.0% Mortgage Loan [Member]	Jun. 30, 2011 Mortgage Notes Receivable [Member]
Acquisitions and Dispositions (Textuals) [Abstract]
Agreement to purchase no. of outpatient buildings																	8
LLC for an aggregate purchase price																	$ 160,700,000
Assumption of debt																	58,400,000
Prepaid ground rent																	12,800,000
Square footage, whole units																	595,000	369,000
Number of on-campus properties																	7
Number of off-campus properties																	1
Percentage of campus properties and off-campus property leased	96.00%		96.00%
Percentage of total square feet of the portfolio leasing by the affiliates	40.00%		40.00%
Lease terms averaging in years			8 years
Weighted average remaining lease terms in years			2 years 10 months 24 days
Number of acute care hospitals in health system	18		18
Number of long-term care facilities in health system	16		16
Number of beds in health system	2,938		2,938
Total aggregate purchase price		5,100,000															34,800,000
Prepaid ground rent included in purchase price																	2,900,000
Deposited in an escrow account for the remainder of the closings																	2,400,000
No. of building acquired by Company																	0
Purchase consideration for additional buildings acquired																	78,500,000
Company has expensed in project cost to date related to the acquisition of this portfolio			900,000
Project costs to date related to the acquisition	300,000		600,000
Purchase of remaining equity interest in joint venture																			20.00%		1.25%
Noncontrolling Interest	3,600,000		3,600,000		3,600,000	3,600,000	3,400,000	200,000
Note receivable repayment	(3,500,000)		(3,500,000)		(3,500,000)	3,500,000	(3,500,000)
Number of 100% leased outpatient facilities owned																			9
Leased outpatient facilities																			100.00%
Aggregate investment in leased outpatient facilities																		87,600,000
Number of medical office buildings under construction		2
Aggregate budget to construct two medical office buildings and parking garage																				54,900,000
Medical Office building area																													200,000
Construction budget approximately																												91,200,000	111,400,000
Orthopedic surgical facility area																												186,000
Interest rate on senior notes																														7.70%	7.00%	11.00%	6.75%
Net worth of affiliates			more than 2.0 billion
Debt Instruments Maturity Date																																	2013
Maturities extended by the borrower																																	Jul. 01, 2015
Funded amount for the development of two facilities	24,000,000		24,000,000
Remaining fund for development of two facilities	178,600,000		178,600,000
Time duration in which remaining amount to be funded			28 months
Mortgage note financing	68,100,000		68,100,000		0			0	68,100,000	40,000,000		2,700,000	2,700,000		1,400,000	13,000,000						40,000,000
Percentage leased portion of mortgage loan at the time of origin										94.00%
Loan originated for the construction of a medical office building																											3,700,000
Cash consideration	104,200,000		104,200,000		1,300,000		800,000	500,000	68,100,000		40,000,000		2,700,000	1,400,000	500,000	13,000,000
Existing construction mortgage loans funded	10,400,000		17,800,000
Area of medical office building																								35,761
Net Investment																							3,100,000	3,500,000
Net proceeds received by company																							400,000	3,400,000
Impairment charge on the disposal																								100,000
Area of physician clinic																							28,861
Mortgage note receivable																							2,700,000
Number of skilled nursing facilities intent to purchase by tenants, whole units																									6
Net investment in skilled nursing facilities in Michigan and Indiana																										8,200,000
Expected aggregate purchase price for facilities intent to purchase by tenants																										17,300,000
Gain on sale of real estate properties																										9,100,000
Numbers of held for sale properties sold, whole units		2																					1	1
Properties classified as held for sale and reclassified to held for use, whole units		1
Gross investment in Tennessee properties	1,100,000		1,100,000
Net investment in Tennessee properties	$ 500,000		$ 500,000
Properties classified as held for sale, whole units	8		8	11
Number of properties in Potential Dispositions, whole units			6
Property reclassified to held for use		1