Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Annual dividends distribution percentage to shareholders to qualify as a REIT	90.00%
Significant temporary differences or tax credits associated with our taxable REIT subsidiaries	$ 0
Difference Between Carry Value Of Net Assets And Tax Basis Of Net Assets	1,300,000
Income tax expense	1,424	$ 1,224	$ 1,617
Uncertain tax positions or unrecognized tax benefits	$ 0
Minimum [Member]
Operating Loss Carryforwards, Expiration Dates	Jan. 01, 2034
Maximum [Member]
Operating Loss Carryforwards, Expiration Dates	Jan. 01, 2037