Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues:
Lease income	$ 308,801	$ 293,645
Other property income	3,138	3,104
Management, transaction, and other fees	6,038	6,684
Total revenues	317,977	303,433
Operating expenses:
Depreciation and amortization	82,707	77,842
Property operating expense	51,022	46,461
Real estate taxes	38,477	36,869
General and administrative	25,280	18,792
Other operating (income) expenses	(497)	2,173
Total operating expenses	196,989	182,137
Other expense (income):
Interest expense, net	36,393	36,738
Gain on sale of real estate, net of tax	(250)	(101,948)
Net investment (income) loss	(1,727)	2,494
Total other expense (income)	34,416	(62,716)
Income from operations before equity in income of investments in real estate partnerships	86,572	184,012
Equity in income of investments in real estate partnerships	11,916	12,804
Net income	98,488	196,816
Noncontrolling interests:
Exchangeable operating partnership units	(420)	(863)
Limited partners' interests in consolidated partnerships	(787)	(725)
Income attributable to noncontrolling interests	(1,207)	(1,588)
Net income attributable to common shareholders	$ 97,281	$ 195,228
Income per common share - basic	$ 0.57	$ 1.14
Income per common share - diluted	$ 0.57	$ 1.14
Partnership Interest [Member]
Revenues:
Lease income	$ 308,801	$ 293,645
Other property income	3,138	3,104
Management, transaction, and other fees	6,038	6,684
Total revenues	317,977	303,433
Operating expenses:
Depreciation and amortization	82,707	77,842
Property operating expense	51,022	46,461
Real estate taxes	38,477	36,869
General and administrative	25,280	18,792
Other operating (income) expenses	(497)	2,173
Total operating expenses	196,989	182,137
Other expense (income):
Interest expense, net	36,393	36,738
Gain on sale of real estate, net of tax	(250)	(101,948)
Net investment (income) loss	(1,727)	2,494
Total other expense (income)	34,416	(62,716)
Income from operations before equity in income of investments in real estate partnerships	86,572	184,012
Equity in income of investments in real estate partnerships	11,916	12,804
Net income	98,488	196,816
Noncontrolling interests:
Limited partners' interests in consolidated partnerships	(787)	(725)
Income attributable to noncontrolling interests	(787)	(725)
Net income attributable to common unit holders	$ 97,701	$ 196,091
Income per common share - basic	$ 0.57	$ 1.14
Income per common share - diluted	$ 0.57	$ 1.14