Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Lease income	$ 1,187,452	$ 1,113,368	$ 980,166
Other property income	10,719	12,456	9,508
Management, transaction, and other fees	25,851	40,337	26,501
Total revenues	1,224,022	1,166,161	1,016,175
Operating expenses:
Depreciation and amortization	319,697	303,331	345,900
Property operating expense	196,148	184,553	170,073
Real estate taxes	149,795	142,129	143,004
General and administrative	79,903	78,218	75,001
Other operating expenses	6,166	5,751	12,642
Total operating expenses	751,709	713,982	746,620
Other expense (income):
Interest expense, net	146,186	145,170	156,678
Goodwill impairment			132,128
Provision for impairment of real estate		84,389	18,536
Gain on sale of real estate, net of tax	(109,005)	(91,119)	(67,465)
Early extinguishment of debt			21,837
Net investment loss (income)	6,921	(5,463)	(5,307)
Total other expense (income)	44,102	132,977	256,407
Income from operations before equity in income of investments in real estate partnerships	428,211	319,202	13,148
Equity in income of investments in real estate partnerships (note 4)	59,824	47,086	34,169
Net income	488,035	366,288	47,317
Noncontrolling interests:
Exchangeable operating partnership units	(2,105)	(1,615)	(203)
Limited partners’ interests in consolidated partnerships	(3,065)	(3,262)	(2,225)
Income attributable to noncontrolling interests	(5,170)	(4,877)	(2,428)
Net income attributable to common stockholders	$ 482,865	$ 361,411	$ 44,889
Income per common share - basic (note 15)	$ 2.82	$ 2.12	$ 0.27
Income per common share - diluted (note 15)	$ 2.81	$ 2.12	$ 0.26
Partnership Interest [Member]
Revenues:
Lease income	$ 1,187,452	$ 1,113,368	$ 980,166
Other property income	10,719	12,456	9,508
Management, transaction, and other fees	25,851	40,337	26,501
Total revenues	1,224,022	1,166,161	1,016,175
Operating expenses:
Depreciation and amortization	319,697	303,331	345,900
Property operating expense	196,148	184,553	170,073
Real estate taxes	149,795	142,129	143,004
General and administrative	79,903	78,218	75,001
Other operating expenses	6,166	5,751	12,642
Total operating expenses	751,709	713,982	746,620
Other expense (income):
Interest expense, net	146,186	145,170	156,678
Goodwill impairment			132,128
Provision for impairment of real estate		84,389	18,536
Gain on sale of real estate, net of tax	(109,005)	(91,119)	(67,465)
Early extinguishment of debt			21,837
Net investment loss (income)	6,921	(5,463)	(5,307)
Total other expense (income)	44,102	132,977	256,407
Income from operations before equity in income of investments in real estate partnerships	428,211	319,202	13,148
Equity in income of investments in real estate partnerships (note 4)	59,824	47,086	34,169
Net income	488,035	366,288	47,317
Noncontrolling interests:
Limited partners’ interests in consolidated partnerships	(3,065)	(3,262)	(2,225)
Income attributable to noncontrolling interests	(3,065)	(3,262)	(2,225)
Net income attributable to common unit holders	$ 484,970	$ 363,026	$ 45,092
Income per common unit - basic (note 15):	$ 2.82	$ 2.12	$ 0.27
Income per common unit - diluted (note 15):	$ 2.81	$ 2.12	$ 0.26