Real Estate Loans Receivable (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Advances on real estate loans receivable:
Investments in new loans	$ 23,919	$ 532
Draws on existing loans	29,153	19,822
Net cash advances on real estate loans	53,072	20,354
Receipts on real estate loans receivable:
Loan payoffs	44,469	0
Principal payments on loans	11,078	12,861
Total receipts on real estate loans	55,547	12,861
Net advances (receipts) on real estate loans	(2,475)	7,493
Seniors Housing Facilities Triple Net [Member]
Advances on real estate loans receivable:
Investments in new loans	23,919	532
Draws on existing loans	27,269	19,455
Net cash advances on real estate loans	51,188	19,987
Receipts on real estate loans receivable:
Loan payoffs	44,469	0
Principal payments on loans	9,589	11,613
Total receipts on real estate loans	54,058	11,613
Net advances (receipts) on real estate loans	(2,870)	8,374
Medical facilities [Member]
Advances on real estate loans receivable:
Investments in new loans	0	0
Draws on existing loans	1,884	367
Net cash advances on real estate loans	1,884	367
Receipts on real estate loans receivable:
Loan payoffs	0	0
Principal payments on loans	1,489	1,248
Total receipts on real estate loans	1,489	1,248
Net advances (receipts) on real estate loans	$ 395	$ (881)