Income Taxes , Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Minimum Percent of Income From Qualifying Sources to Allow For Real Estate Investment Trust Classification			95.00%
Required Minimum Percent of Taxable Income Distributed to Stock Holders			90.00%
Deferred Tax Liabilities, Gross	$ 22,500		$ 22,500
Provision for state income taxes	100	$ (283)	(100)	$ (567)
Deferred Income Tax Expense (Benefit)	$ (81)	$ 0	$ (745)	$ 0