Real Estate Loans Receivable (Details 1) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of allowance for losses on loans receivable
Balance at beginning of year		$ 0	$ 0	$ 0
Provision for loan losses		0	0	2,110
Charge-offs		0	0	2,110
Balance at end of year		0	0	0
Summary of loan impairments
Balance of impaired loans at end of year					$ 0	$ 21,000	$ 500
Allowance for loan losses		0	0	0	0	0	0
Balance of impaired loans not reserved					$ 0	$ 21,000	$ 500
Average impaired loans for the year		10,500	10,750	2,365
Interest recognized on impaired loans	[1]	$ 0	$ 757	$ 206

[1] (1) Represents interest recognized prior to placement on non-accrual status.