Income Taxes Deferred Tax Assets and Liabilities (Details) - Subsidiary of Common Parent - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investments, Owned, Federal Income Tax Note
Real estate asset basis differences	$ 13,387	$ 25,627
Deferred revenue	0	22
Deferred expenses	12,481	14,106
Net operating loss carryforward	32,585	28,493
Accrued liabilities	102	3,951
Deferred tax assets	58,555	72,199
Deferred tax liabilities, real estate asset basis differences	(311)	(145)
Deferred Tax Liabilities, Net	(311)	(145)
Net deferred tax assets, before valuation allowance	58,244	72,054
Valuation Allowance	(58,244)	(72,054)
Net deferred tax assets, included in other assets	$ 0	$ 0