Investments - Summary of Loans Receivable, Net of Premium (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]    
Mortgage - principal $ 96,594 $ 102,315
Mortgage - premium 12,452 14,976
Mortgages, net 109,046 117,291
Other note - principal 379 430
Total loans receivable, net $ 109,425 $ 117,721