Fee and Other Income - Summary of Fee and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fee income:
Total fee income	$ 6,201	$ 6,209	$ 12,871	$ 12,539
Other income	1,440	920	2,790	3,151
Total fee and other income	7,641	7,129	15,661	15,690
Property Management Fees [Member]
Fee income:
Total fee income	2,085	2,239	4,281	4,689
Asset Management Fees [Member]
Fee income:
Total fee income	3,409	3,571	6,895	7,092
Acquisition Disposition And Leasing [Member]
Fee income:
Total fee income	439		439
Other Fee Income [Member]
Fee income:
Total fee income	$ 268	$ 399	$ 1,256	$ 758