Business Segments - Summary of Information for Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary information for the reportable segments
Rental and other property revenues	$ 169,836	$ 151,451	$ 143,692
Property operating expenses	67,613	61,514	57,541
Other operating expenses not allocated to segments	117,863	104,294	71,092
Total operating expenses	185,476	165,808	128,633
Proportionate property net operating income (loss)	(15,640)	(14,357)	15,059
Other items included in loss before income tax benefit	(2,910)	(1,563)	(18,247)
Loss before income tax benefit	(18,550)	(15,920)	(3,188)
Operating Segments [Member]
Summary information for the reportable segments
Rental and other property revenues	136,250	130,797	131,175
Property operating expenses	43,463	41,683	41,090
Total operating expenses	43,463	41,683	41,090
Proportionate property net operating income (loss)	92,787	89,114	90,085
Loss before income tax benefit	92,787	89,114	90,085
Segment Reconciling Items [Member]
Summary information for the reportable segments
Rental and other property revenues	6,851	6,088	5,629
Property operating expenses	6,727	5,702	5,202
Total operating expenses	6,727	5,702	5,202
Proportionate property net operating income (loss)	124	386	427
Loss before income tax benefit	124	386	427
Corporate Non-Segment [Member]
Summary information for the reportable segments
Rental and other property revenues		65
Property operating expenses	5,285	9,000	9,318
Other operating expenses not allocated to segments	117,863	104,294	71,092
Total operating expenses	123,148	113,294	80,410
Proportionate property net operating income (loss)	(123,148)	(113,229)	(80,410)
Other items included in loss before income tax benefit	(2,910)	(1,563)	(18,247)
Loss before income tax benefit	(126,058)	(114,792)	(98,657)
Development and Redevelopment [Member] | Operating Segments [Member]
Summary information for the reportable segments
Rental and other property revenues	12,418	1,515
Property operating expenses	7,931	981
Total operating expenses	7,931	981
Proportionate property net operating income (loss)	4,487	534
Loss before income tax benefit	4,487	534
Other [Member] | Operating Segments [Member]
Summary information for the reportable segments
Rental and other property revenues	14,317	12,986	6,888
Property operating expenses	4,207	4,148	1,931
Total operating expenses	4,207	4,148	1,931
Proportionate property net operating income (loss)	10,110	8,838	4,957
Loss before income tax benefit	$ 10,110	$ 8,838	$ 4,957