Revenues from Contracts with Customers - Schedule of Revenues from Contracts with Customers and Our Other Sources of Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue
Revenues from contracts with customers	$ 2,081,390	$ 2,304,500	$ 2,499,008
Revenues	2,470,368	2,705,527	2,906,443
Leasing and other commissions
Disaggregation of Revenue
Revenues from contracts with customers	839,595	831,874	826,942
Revenues	839,595	831,874	826,942
Investment sales
Disaggregation of Revenue
Revenues from contracts with customers	381,276	606,416	757,744
Revenues	381,276	606,416	757,744
Mortgage brokerage and debt placement
Disaggregation of Revenue
Revenues from contracts with customers	126,934	173,253	180,561
Management services
Disaggregation of Revenue
Revenues from contracts with customers	733,585	692,957	733,761
Fair value of expected net future cash flows from servicing recognized at commitment, net
Disaggregation of Revenue
Other sources of revenue	82,082	109,926	136,406
Loan originations related fees and sales premiums, net
Disaggregation of Revenue
Other sources of revenue	69,604	74,573	89,075
Servicing fees and other
Disaggregation of Revenue
Other sources of revenue	$ 237,292	$ 216,528	$ 181,954