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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue
Revenues from contracts with customers:	$ 567,976	$ 513,151	$ 1,545,446	$ 1,432,292
Total	685,912	616,283	1,865,786	1,722,926
Leasing and other commissions
Disaggregation of Revenue
Revenues from contracts with customers:	214,581	203,268	581,937	600,185
Total	214,581	203,268	581,937	600,185
Investment sales
Disaggregation of Revenue
Revenues from contracts with customers:	99,223	94,707	261,777	244,304
Mortgage brokerage and debt placement
Disaggregation of Revenue
Revenues from contracts with customers:	42,195	24,479	97,555	60,955
Management services
Disaggregation of Revenue
Revenues from contracts with customers:	211,977	190,697	604,177	526,848
Management services | Revision of Prior Period, Adjustment
Disaggregation of Revenue
Revenues from contracts with customers:		(2,200)		(6,300)
Fair value of expected net future cash flows from servicing recognized at commitment, net
Disaggregation of Revenue
Other sources of revenue	26,220	20,997	65,759	58,142
Loan originations related fees and sales premiums, net
Disaggregation of Revenue
Other sources of revenue	21,070	19,083	56,423	52,639
Servicing fees and other
Disaggregation of Revenue
Other sources of revenue	$ 70,646	63,052	$ 198,158	179,853
Servicing fees and other | Revision of Prior Period, Adjustment
Disaggregation of Revenue
Other sources of revenue		$ 2,200		$ 6,300