Business Segments - Summary of Information for Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Summary information for the reportable segments
Total revenues	$ 820,036	$ 773,723	$ 740,853
Other operating expenses not allocated to segments	393,976	384,957	365,547
Total operating expenses	669,808	646,221	633,648
Proportionate property net operating income (loss)	150,228	127,502	107,205
Other items included in income before income tax expense	541,486	846,471	366,773
Income before income tax expense	691,714	973,973	473,978
Real Estate
Summary information for the reportable segments
Property management and operating expenses	275,832	261,264	268,101
Segment Reconciling Items
Summary information for the reportable segments
Total revenues	85,825	125,800	113,634
Other operating expenses not allocated to segments	0	0	0
Total operating expenses	44,295	51,350	48,101
Proportionate property net operating income (loss)	41,530	74,450	65,533
Other items included in income before income tax expense	0	0	0
Income before income tax expense	41,530	74,450	65,533
Segment Reconciling Items | Real Estate
Summary information for the reportable segments
Property management and operating expenses	44,295	51,350	48,101
Corporate Non-Segment
Summary information for the reportable segments
Total revenues	14,482	53,822	127,323
Other operating expenses not allocated to segments	393,976	384,957	365,547
Total operating expenses	434,716	435,388	444,718
Proportionate property net operating income (loss)	(420,234)	(381,566)	(317,395)
Other items included in income before income tax expense	541,486	846,471	366,773
Income before income tax expense	121,252	464,905	49,378
Corporate Non-Segment | Real Estate
Summary information for the reportable segments
Property management and operating expenses	40,740	50,431	79,171
Same Store | Operating Segments
Summary information for the reportable segments
Total revenues	600,142	556,318	499,896
Other operating expenses not allocated to segments	0	0	0
Total operating expenses	152,898	147,084	140,829
Proportionate property net operating income (loss)	447,244	409,234	359,067
Other items included in income before income tax expense	0	0	0
Income before income tax expense	447,244	409,234	359,067
Same Store | Operating Segments | Real Estate
Summary information for the reportable segments
Property management and operating expenses	152,898	147,084	140,829
Other Real Estate | Operating Segments
Summary information for the reportable segments
Total revenues	119,587	37,783	0
Other operating expenses not allocated to segments	0	0	0
Total operating expenses	37,899	12,399	0
Proportionate property net operating income (loss)	81,688	25,384	0
Other items included in income before income tax expense	0	0	0
Income before income tax expense	81,688	25,384	0
Other Real Estate | Operating Segments | Real Estate
Summary information for the reportable segments
Property management and operating expenses	$ 37,899	$ 12,399	$ 0