Schedule IV - Mortgage Loans on Real Estate (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Mortgage Loans on Real Estate [Line Items]
Carrying Amount	$ 162,191	[1]
Medical Office [Member] | Permanent Mortgage Loans [Member] | Iowa [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.70%	[2]
Maturity Date	Jan. 10, 2014	[2]
Original Face Amount	40,000
Carrying Amount	40,000	[1]
Balloon	40,000
Medical Office [Member] | Permanent Mortgage Loans [Member] | Florida [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.50%	[3]
Maturity Date	Apr. 10, 2015	[3]
Original Face Amount	3,750
Carrying Amount	3,750	[1]
Balloon	3,750
Medical Office [Member] | Construction Loans [Member] | Oklahoma [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%	[3]
Maturity Date	Dec. 31, 2013	[3]
Original Face Amount	91,179
Carrying Amount	56,842	[1]
Balloon	56,842
Orthopedic Surgical Facility [Member] | Construction Loans [Member] | Missouri [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	6.75%	[3]
Maturity Date	Dec. 31, 2013	[3]
Original Face Amount	111,400
Carrying Amount	61,599	[1]
Balloon	$ 61,599

[1] A rollforward of Mortgage loans on real estate for the three years ended December 31, 2012 follows:

[2] Interest only until maturity. Principal payments may be made during term without penalty with remaining principal balance due at maturity.

[3] Interest only until maturity.