Co-investments - Combined Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Rental properties and real estate under development	$ 21,950		$ 21,950			$ 111,562
Total assets	12,558,011		12,558,011			12,997,873
Debt	6,518,213		6,518,213			6,786,699
Other liabilities	42,027		42,027			39,969
Equity	6,006,585	$ 6,136,703	6,006,585	$ 6,136,703	$ 6,138,207	6,176,508	$ 6,210,931	$ 6,183,192
Total liabilities and equity/capital	12,558,011		12,558,011			12,997,873
Equity Method Investment, Summarized Financial Information [Abstract]
Property revenues	399,978	350,978	781,883	706,103
Interest expense	(50,477)	(50,971)	(100,854)	(102,620)
General and administrative	(13,127)	(12,222)	(25,369)	(22,034)
Net income (loss)	61,690	69,615	140,065	246,564
Total co-investment | Affiliated Entity
Equity Method Investment, Summarized Financial Information [Abstract]
Company's share of net income	1,800	2,300	3,600	4,600
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Total co-investment
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Rental properties and real estate under development	4,740,837		4,740,837			4,603,465
Other assets	328,851		328,851			278,411
Total assets	5,069,688		5,069,688			4,881,876
Debt	3,326,245		3,326,245			3,046,765
Other liabilities	170,222		170,222			200,129
Equity	1,573,221		1,573,221			1,634,982
Total liabilities and equity/capital	5,069,688		5,069,688			4,881,876
Company's share of equity	1,049,252		1,049,252			$ 1,142,257
Equity Method Investment, Summarized Financial Information [Abstract]
Property revenues	93,576	68,405	178,176	140,164
Property operating expenses	(29,509)	(27,013)	(65,302)	(54,344)
Net operating income	64,067	41,392	112,874	85,820
Interest expense	(21,779)	(15,965)	(40,081)	(32,665)
General and administrative	(6,392)	(4,029)	(10,359)	(8,310)
Depreciation and amortization	(39,381)	(31,813)	(78,188)	(64,522)
Net income (loss)	(3,485)	(10,415)	(15,754)	(19,677)
Company's share of net income	$ (8,400)	$ 18,248	$ 12,771	$ 35,259