Investments in and Advances to Unconsolidated Affiliates - Unconsolidated Affiliates - Schedule of Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Combined and Condensed Statements of Operations
Depreciation and amortization	$ (30,866)	$ (34,457)	$ (93,601)	$ (101,627)
Company's equity in earnings (losses) of unconsolidated affiliates	644	(624)	4,013	(155)
Unconsolidated Affiliates
Combined and Condensed Statements of Operations
Revenues	17,912	17,302	54,734	53,170
Operating and other expenses	(6,845)	(6,234)	(19,878)	(18,996)
Interest expense	(4,733)	(4,865)	(14,136)	(15,135)
Depreciation and amortization	(6,320)	(7,947)	(20,797)	(20,831)
Gain on disposition of properties	0	0	3,206	0
Net income (loss) attributable to unconsolidated affiliates	14	(1,744)	3,129	(1,792)
Operating Partnership, as General Partner or Managing Member
Combined and Condensed Statements of Operations
Company’s share of equity in net income of unconsolidated affiliates	899	21	4,965	(153)
Income attributable to unconsolidated affiliated recently sold or consolidated	0	(11)	0	1,280
Basis differential amortization	(255)	(634)	(952)	(1,282)
Company's equity in earnings (losses) of unconsolidated affiliates	$ 644	$ (624)	$ 4,013	$ (155)