Fee and Other Income - Summary of Fee and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fee income:
Total fee income	$ 6,561	$ 9,153	$ 19,432	$ 21,692
Other income	1,719	2,202	4,509	5,353
Total fee and other income	8,280	11,355	23,941	27,045
Property Management Fees [Member]
Fee income:
Total fee income	2,176	2,270	6,457	6,959
Asset Management Fees [Member]
Fee income:
Total fee income	3,280	3,636	10,175	10,728
Acquisition Disposition Leasing And Other [Member]
Fee income:
Total fee income	$ 1,105	$ 3,247	$ 2,800	$ 4,005