Business Segments - Summary of Information for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Summary information for the reportable segments
Total revenues	$ 197,307	$ 200,871	$ 623,677	$ 565,849
Other operating expenses not allocated to segments	100,695	110,290	320,567	300,720
Total operating expenses	158,771	174,299	510,689	477,399
Proportionate property net operating income (loss)	38,536	26,572	112,988	88,450
Other items included in income (loss) before income tax expense	676,571	(23,130)	594,085	528,955
Income before income tax expense	715,107	3,442	707,073	617,405
Real Estate
Summary information for the reportable segments
Property operating expenses	58,076	64,009	190,122	176,679
Segment Reconciling Items
Summary information for the reportable segments
Total revenues	11,981	32,402	80,124	93,187
Other operating expenses not allocated to segments	0	0	0	0
Total operating expenses	9,076	13,468	37,850	38,559
Proportionate property net operating income (loss)	2,905	18,934	42,274	54,628
Other items included in income (loss) before income tax expense	0	0	0	0
Income before income tax expense	2,905	18,934	42,274	54,628
Segment Reconciling Items | Real Estate
Summary information for the reportable segments
Property operating expenses	9,076	13,468	37,850	38,559
Corporate Non-Segment
Summary information for the reportable segments
Total revenues	4,164	12,435	11,568	45,173
Other operating expenses not allocated to segments	100,695	110,290	320,567	300,720
Total operating expenses	101,184	118,699	327,815	321,725
Proportionate property net operating income (loss)	(97,020)	(106,264)	(316,247)	(276,552)
Other items included in income (loss) before income tax expense	676,571	(23,130)	594,085	528,955
Income before income tax expense	579,551	(129,394)	277,838	252,403
Corporate Non-Segment | Real Estate
Summary information for the reportable segments
Property operating expenses	489	8,409	7,248	21,005
Same Store | Operating Segments
Summary information for the reportable segments
Total revenues	151,619	142,009	445,881	411,052
Other operating expenses not allocated to segments	0	0	0	0
Total operating expenses	40,353	37,349	117,014	111,316
Proportionate property net operating income (loss)	111,266	104,660	328,867	299,736
Other items included in income (loss) before income tax expense	0	0	0	0
Income before income tax expense	111,266	104,660	328,867	299,736
Same Store | Operating Segments | Real Estate
Summary information for the reportable segments
Property operating expenses	40,353	37,349	117,014	111,316
Other Real Estate | Operating Segments
Summary information for the reportable segments
Total revenues	29,543	14,025	86,104	16,437
Other operating expenses not allocated to segments	0	0	0	0
Total operating expenses	8,158	4,783	28,010	5,799
Proportionate property net operating income (loss)	21,385	9,242	58,094	10,638
Other items included in income (loss) before income tax expense	0	0	0	0
Income before income tax expense	21,385	9,242	58,094	10,638
Other Real Estate | Operating Segments | Real Estate
Summary information for the reportable segments
Property operating expenses	$ 8,158	$ 4,783	$ 28,010	$ 5,799