Business Segments - Summary of Information for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Summary information for the reportable segments
Revenues, Total	$ 183,500	$ 178,333	$ 364,978	$ 354,746
Other operating expenses not allocated to segments	80,913	83,527	176,077	166,097
Total operating expenses	144,700	148,285	303,100	295,472
Proportionate property net operating income	38,800	30,048	61,878	59,274
Other items included in income before income tax expense	(174,358)	51,770	(552,085)	11,199
Income (loss) before income tax (expense) benefit	213,158	(21,722)	613,963	70,473
Real Estate [Member]
Summary information for the reportable segments
Property operating expenses	63,787	64,758	127,023	129,375
Segment Reconciling Items [Member]
Summary information for the reportable segments
Revenues, Total	20,047	19,400	39,744	38,623
Other operating expenses not allocated to segments	0	0	0	0
Total operating expenses	9,691	10,050	19,698	19,814
Proportionate property net operating income	10,356	9,350	20,046	18,809
Other items included in income before income tax expense	0	0	0	0
Income (loss) before income tax (expense) benefit	10,356	9,350	20,046	18,809
Segment Reconciling Items [Member] | Real Estate [Member]
Summary information for the reportable segments
Property operating expenses	9,691	10,050	19,698	19,814
Corporate Non-Segment [Member]
Summary information for the reportable segments
Revenues, Total	4,108	22,615	12,947	45,083
Other operating expenses not allocated to segments	80,913	83,527	176,077	166,097
Total operating expenses	90,688	97,982	195,470	196,371
Proportionate property net operating income	(86,580)	(75,367)	(182,523)	(151,288)
Other items included in income before income tax expense	(174,358)	51,770	(552,085)	11,199
Income (loss) before income tax (expense) benefit	87,778	(127,137)	369,562	(140,089)
Corporate Non-Segment [Member] | Real Estate [Member]
Summary information for the reportable segments
Property operating expenses	9,775	14,455	19,393	30,274
Same Store [Member] | Operating Segments [Member]
Summary information for the reportable segments
Revenues, Total	142,066	134,478	280,174	268,036
Other operating expenses not allocated to segments	0	0	0	0
Total operating expenses	37,556	38,990	75,059	76,891
Proportionate property net operating income	104,510	95,488	205,115	191,145
Other items included in income before income tax expense	0	0	0	0
Income (loss) before income tax (expense) benefit	104,510	95,488	205,115	191,145
Same Store [Member] | Operating Segments [Member] | Real Estate [Member]
Summary information for the reportable segments
Property operating expenses	37,556	38,990	75,059	76,891
Other Real Estate [Member] | Operating Segments [Member]
Summary information for the reportable segments
Revenues, Total	17,279	1,840	32,113	3,004
Other operating expenses not allocated to segments	0	0	0	0
Total operating expenses	6,765	1,263	12,873	2,396
Proportionate property net operating income	10,514	577	19,240	608
Other items included in income before income tax expense	0	0	0	0
Income (loss) before income tax (expense) benefit	10,514	577	19,240	608
Other Real Estate [Member] | Operating Segments [Member] | Real Estate [Member]
Summary information for the reportable segments
Property operating expenses	$ 6,765	$ 1,263	$ 12,873	$ 2,396