Commitments and Contingencies (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011 Property sqft	Dec. 31, 2010
Construction In Progress
Properties	3
Approximate Square Feet, whole units	300,614
CIP	$ 86,328	$ 80,262
Estimated Remaining Funding	22,130
Estimated total investment	83,282
Colorado Estimated Completion Date Two [Member]
Construction In Progress
Estimated Completion Date	1Q 2012
Property Type	MOB
Properties	1
Approximate Square Feet, whole units	90,579
CIP	15,408
Estimated Remaining Funding	6,189
Estimated total investment	21,597
South Dakota [Member]
Construction In Progress
Estimated Completion Date	1Q 2012
Property Type	INPATIENT
Properties	1
Approximate Square Feet, whole units	113,602
CIP	37,974
Estimated Remaining Funding	5,626
Estimated total investment	43,600
Texas One [Member]
Construction In Progress
Estimated Completion Date	3Q 2012
Property Type	MOB
Properties	1
Approximate Square Feet, whole units	96,433
CIP	7,770
Estimated Remaining Funding	10,315
Estimated total investment	18,085
Land Held for Development [Member]
Construction In Progress
Estimated total investment	0
Iowa [Member]
Construction In Progress
CIP	4,403
Texas Two [Member]
Construction In Progress
CIP	$ 20,773