Commitments and Contingencies (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2012 Facilities Affiliate sqft Project Lease MortgageLoan Property
Property, Plant and Equipment [Line Items]
Number of Properties	1
Commitments and Contingencies (Additional Textual) [Abstract]
Number of construction project remaining with an estimated completion date of the third quarter of 2012	1
Area developed for various projects	96,433
Cost of construction of office building	$ 14,000,000
Total construction mortgage note	68,700,000
Estimated Investment	13,959,000
Number of construction loan	2
Remaining funding commitment on mortgage notes affiliated with Mercy Health	133,900,000
Number of properties of a company developed	11
Properties leased	51.00%
Properties occupied	33.00%
Number of Affiliates	2
Number of facilities	2
Number of leases terminated	2
Plaintiff Commission	1,340,000
Life Care [Member]
Commitments and Contingencies (Additional Textual) [Abstract]
Maximum estimated amount sought by plaintiffs	2,000,000
Frisco [Member] | Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Compensatory and punitive	10,000,000
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Number of Properties	1	[1]
Commitments and Contingencies (Additional Textual) [Abstract]
Estimated Investment	13,959,000	[1]
Mortgage Construction Notes [Member]
Property, Plant and Equipment [Line Items]
Number of Properties	2
Commitments and Contingencies (Additional Textual) [Abstract]
Estimated Investment	202,614,000
Stabilization in Progress [Member]
Property, Plant and Equipment [Line Items]
Number of Properties	11	[1]
Commitments and Contingencies (Additional Textual) [Abstract]
Estimated Investment	396,026,000	[1]
Texas One Garage [Member]
Commitments and Contingencies (Additional Textual) [Abstract]
Estimated Investment	$ 4,100,000

[1] The estimated total budget for the development properties reflects the original budget including estimated tenant improvement allowances but does not include any estimate of excess tenant improvement cost financing by the Company. To the extent actual amounts funded for the development properties reflect excess tenant improvement costs financed by the Company, the estimated remaining fundings could be greater than the amount budgeted.