Commercial Mortgage Origination, Net (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
Commercial mortgage origination, net
Disaggregation of Revenue
Revenues	278,620	357,752	406,042
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
Mortgage brokerage and debt placement
Disaggregation of Revenue
Revenues from contracts with customers	$ 126,934	$ 173,253	$ 180,561