Revenues from Contracts with Customers - Schedule of Revenues from Contracts with Customers and Our Other Sources of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue
Revenues from contracts with customers	$ 478,706	$ 653,533	$ 923,255	$ 1,235,949
Revenues	585,844	755,351	1,106,643	1,433,599
Leasing and other commissions
Disaggregation of Revenue
Revenues from contracts with customers	203,611	212,825	396,917	411,778
Revenues	203,611	212,825	396,917	411,778
Investment sales
Disaggregation of Revenue
Revenues from contracts with customers	77,604	209,053	149,597	361,167
Revenues	77,604	209,053	149,597	361,167
Mortgage brokerage and debt placement
Disaggregation of Revenue
Revenues from contracts with customers	19,330	50,326	36,476	96,615
Management services
Disaggregation of Revenue
Revenues from contracts with customers	178,161	181,329	340,265	366,389
Fair value of expected net future cash flows from servicing recognized at commitment, net
Disaggregation of Revenue
Other sources of revenue	23,046	31,499	37,145	60,971
Loan originations related fees and sales premiums, net
Disaggregation of Revenue
Other sources of revenue	21,593	17,963	33,556	36,264
Servicing fees and other
Disaggregation of Revenue
Other sources of revenue	$ 62,499	$ 52,356	$ 112,687	$ 100,415