Segment Information - Summary of Certain Balance Sheet Data by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Segment Reporting Information
Real estate, at cost	$ 5,863,637	$ 6,236,476
Investments in unconsolidated real estate ventures	360,846	462,885
Total assets	5,895,980	6,386,206
Operating Segments | Commercial Segment
Segment Reporting Information
Real estate, at cost	2,747,473	3,422,278
Investments in unconsolidated real estate ventures	225,283	281,515
Total assets	3,025,885	3,591,839
Operating Segments | Multifamily Segment
Segment Reporting Information
Real estate, at cost	2,707,292	2,367,712
Investments in unconsolidated real estate ventures	56,984	103,389
Total assets	2,042,272	1,797,807
Other
Segment Reporting Information
Real estate, at cost	408,872	446,486
Investments in unconsolidated real estate ventures	78,579	77,981
Total assets	$ 827,823	$ 996,560