Income Taxes Deferred Tax Assets and Liabilities (Details) - Subsidiary of Common Parent - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investments, Owned, Federal Income Tax Note
Real estate asset basis differences	$ 25,627	$ 25,561
Deferred revenue	22	18
Deferred expenses	14,106	13,923
Net operating loss carryforward	28,493	27,215
Accrued liabilities	3,951	3,974
Deferred tax assets	72,199	70,691
Deferred tax liabilities, real estate asset basis differences	(145)	(913)
Deferred Tax Liabilities, Net	(145)	(913)
Net deferred tax assets, before valuation allowance	72,054	69,778
Valuation Allowance	(72,054)	(69,778)
Net deferred tax assets, included in other assets	$ 0	$ 0