Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Lease income	$ 1,283,939	$ 1,187,452	$ 1,113,368
Other property income	11,573	10,719	12,456
Management, transaction, and other fees	26,954	25,851	40,337
Total revenues	1,322,466	1,224,022	1,166,161
Operating expenses:
Depreciation and amortization	352,282	319,697	303,331
Property operating expense	229,209	196,148	184,553
Real estate taxes	165,560	149,795	142,129
General and administrative	97,806	79,903	78,218
Other operating expenses	9,459	6,166	5,751
Total operating expenses	854,316	751,709	713,982
Other expense (income):
Interest expense, net	154,249	146,186	145,170
Provision for impairment of real estate			84,389
Gain on sale of real estate, net of tax	(661)	(109,005)	(91,119)
Early extinguishment of debt	(99)
Net investment (income) loss	(5,665)	6,921	(5,463)
Total other expense	147,824	44,102	132,977
Income from operations before equity in income of investments in real estate partnerships	320,326	428,211	319,202
Equity in income of investments in real estate partnerships (note 4)	50,541	59,824	47,086
Net income	370,867	488,035	366,288
Noncontrolling interests:
Exchangeable operating partnership units	(2,008)	(2,105)	(1,615)
Limited partners’ interests in consolidated partnerships	(4,302)	(3,065)	(3,262)
Income attributable to noncontrolling interests	(6,310)	(5,170)	(4,877)
Net income attributable to the Company	364,557	482,865	361,411
Preferred stock dividends	(5,057)
Net income attributable to common shareholders	$ 359,500	$ 482,865	$ 361,411
Income per common share - basic (note 15)	$ 2.04	$ 2.82	$ 2.12
Income per common share - diluted (note 15)	$ 2.04	$ 2.81	$ 2.12
Partnership Interest [Member]
Revenues:
Lease income	$ 1,283,939	$ 1,187,452	$ 1,113,368
Other property income	11,573	10,719	12,456
Management, transaction, and other fees	26,954	25,851	40,337
Total revenues	1,322,466	1,224,022	1,166,161
Operating expenses:
Depreciation and amortization	352,282	319,697	303,331
Property operating expense	229,209	196,148	184,553
Real estate taxes	165,560	149,795	142,129
General and administrative	97,806	79,903	78,218
Other operating expenses	9,459	6,166	5,751
Total operating expenses	854,316	751,709	713,982
Other expense (income):
Interest expense, net	154,249	146,186	145,170
Provision for impairment of real estate			84,389
Gain on sale of real estate, net of tax	(661)	(109,005)	(91,119)
Early extinguishment of debt	(99)
Net investment (income) loss	(5,665)	6,921	(5,463)
Total other expense	147,824	44,102	132,977
Income from operations before equity in income of investments in real estate partnerships	320,326	428,211	319,202
Equity in income of investments in real estate partnerships (note 4)	50,541	59,824	47,086
Net income	370,867	488,035	366,288
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(4,302)	(3,065)	(3,262)
Income attributable to noncontrolling interests	(4,302)	(3,065)	(3,262)
Net income attributable to the Company	366,565	484,970	363,026
Preferred unit distributions and issuance costs	(5,057)
Net income attributable to common unit holders	$ 361,508	$ 484,970	$ 363,026
Income per common unit - basic (note 15):	$ 2.04	$ 2.82	$ 2.12
Income per common unit - diluted (note 15):	$ 2.04	$ 2.81	$ 2.12