Non-controlling Interest - Operating Partnership - Schedule of Income (Expense) Allocated and Distributions Paid to Noncontrolling Interests (Details) - Non-controlling Interest - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Noncontrolling Interest
Net income allocated	$ 671	$ 1,186
Distributions paid	$ 599	$ 570