Summary of Significant Accounting Policies - Schedule of Revenue by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from External Customer
Revenues	$ 2,470,368	$ 2,705,527	$ 2,906,443
Management services, servicing fees and other
Revenue from External Customer
Revenues	970,877	909,485	915,715
Leasing and other commissions
Revenue from External Customer
Revenues	839,595	831,874	826,942
Investment sales
Revenue from External Customer
Revenues	381,276	606,416	757,744
Commercial mortgage origination, net
Revenue from External Customer
Revenues	$ 278,620	$ 357,752	$ 406,042