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Schedule IV Mortgage Loans Receivable (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Mortgage Loans on Real Estate [Abstract]      
Begining, balance $ 27,461 $ 30,693 $ 27,002
Increase of interest receivable on mortgage loans, additions 2,738 3,037 4,766
Amounts received, deductions (3,491) (6,269) (1,075)
Ending, balance $ 26,708 $ 27,461 $ 30,693