Real Estate Leases and Mortgage Notes Receivable (Details 1) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Summary of Company's mortgage loans
Principal Balance		$ 37,029,000
Unamortized Fees		430,000
Total	97,381,000	36,599,000	31,008,000	59,001,000
Construction Notes [Member]
Summary of Company's mortgage loans
Principal Balance		18,409,000
Unamortized Fees		430,000
Total	51,471,000	17,979,000
Other mortgage notes [Member]
Summary of Company's mortgage loans
Principal Balance	45,910,000	18,620,000
Unamortized Fees		0
Total	$ 45,910,000	$ 18,620,000