Real Estate Loans Receivable (Details) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Advances on real estate loans receivable:
Investments in new loans	$ 11,807	$ 24,416
Draws on existing loans	16,660	18,838
Sub-total	28,467	43,254
Less: Seller financing on property sales		(1,470)
Net cash advances on real estate loans	28,467	41,784
Receipts on real estate loans receivable:
Loan payoffs	129,860	1,599
Principal payments on loans	8,536	7,821
Total receipts on real estate loans	138,396	9,420
Net advances (receipts) on real estate loans	(109,929)	32,364
Senior housing triple-net [Member]
Advances on real estate loans receivable:
Investments in new loans	11,807	8,617
Draws on existing loans	8,824	18,838
Sub-total	20,631	27,455
Net cash advances on real estate loans	20,631	27,455
Receipts on real estate loans receivable:
Loan payoffs	129,860	1,599
Principal payments on loans	5,164	7,705
Total receipts on real estate loans	135,024	9,304
Net advances (receipts) on real estate loans	(114,393)	18,151
Medical facilities [Member]
Advances on real estate loans receivable:
Investments in new loans		15,799
Draws on existing loans	7,836
Sub-total	7,836	15,799
Less: Seller financing on property sales		(1,470)
Net cash advances on real estate loans	7,836	14,329
Receipts on real estate loans receivable:
Principal payments on loans	3,372	116
Total receipts on real estate loans	3,372	116
Net advances (receipts) on real estate loans	$ 4,464	$ 14,213