Fee and Other Income - Summary of Fee and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fee income:
Total fee income	$ 6,330	$ 5,999
Other income	2,231	3,049
Total fee and other income	8,561	9,048
Property Management Fees [Member]
Fee income:
Total fee income	2,450	1,642
Asset Management Fees [Member]
Fee income:
Total fee income	3,521	2,318
Acquisition, Disposition and Leasing Fee [Member]
Fee income:
Total fee income		1,331
Other Fee Income [Member]
Fee income:
Total fee income	$ 359	$ 708