Investments in and Advances to Unconsolidated Affiliates - Unconsolidated Affiliates - Schedule of Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Statement Of Financial Position [Abstract]
Real estate under development	$ 203,773		$ 247,201
Other assets	186,509		170,281
Total assets	4,261,746	[1]	4,131,069	[1]	$ 4,251,695
Total liabilities and equity	4,261,746		4,131,069
Investments carried at fair value or cost	3,811		1,881
Company's share of distributions in excess of income from and investments in unconsolidated affiliates	9,939		15,616
Investments in and advances to unconsolidated affiliates	322,326		272,829
Unconsolidated Affiliates
Statement Of Financial Position [Abstract]
Rental property, net	631,661		633,375
Real estate under development	8,112		14,664
Other assets	78,300		70,710
Total assets	718,073		718,749
Mortgage notes payable	571,461		569,040
Other liabilities	69,166		76,341
Partners’ equity	77,446		73,368
Total liabilities and equity	718,073		718,749
Company's share of accumulated equity	113,285		112,088
Basis differential	66,031		66,724
Deferred fees, net of portion related to the Company's interest	4,071		3,559
Amounts receivable/payable by the Company	666		363
Investments in and advances to unconsolidated affiliates, net of Company's share of distributions in excess of income from and investments in unconsolidated affiliates	184,053		182,734
Investments carried at fair value or cost	128,334		74,479
Company's share of distributions in excess of income from and investments in unconsolidated affiliates	9,939		15,616
Investments in and advances to unconsolidated affiliates	$ 322,326		$ 272,829

[1] Real estate at cost and total assets for the Funds segment include $657.0 million and $641.7 million, or $190.9 million and $186.5 million net of non-controlling interests, related to Fund II’s City Point property at December 31, 2021 and 2020, respectively.