Real Estate (New Real Estate Investments and Investment Commitments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
New Real Estate Investments and Commitments	$ 159,457,000
Bickford Senior Living [Member]
New Real Estate Investments and Commitments	52,667,000
Bickford Commitment [Member]
New Real Estate Investments and Commitments	27,000,000
Landmark Senior Living [Member]
New Real Estate Investments and Commitments	20,200,000
Milestone Retirement Communities [Member]
New Real Estate Investments and Commitments	9,000,000
Sante Partners [Member]
New Real Estate Investments and Commitments	25,120,000
Chancellor Health Care [Member]
New Real Estate Investments and Commitments	12,000,000
Legend Healthcare [Member]
New Real Estate Investments and Commitments	$ 13,470,000