Schedule IV - Mortgage Loan on Real Estate (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Mortgage Loans on Real Estate
Balance at beginning of year	$ 20,848	$ 0	$ 0
Additions	0	21,060	0
Amortization and accretion	(63)	212	0
Repayments	(10,222)	0	0
Ending balance	$ 10,689	$ 20,848	$ 0