Commercial Mortgage Origination, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue
Revenues from contracts with customers	$ 515,331	$ 557,257	$ 1,438,586	$ 1,793,206
Revenues	616,283	664,646	1,722,926	2,098,245
Commercial mortgage origination, net
Disaggregation of Revenue
Revenues	64,559	90,633	171,736	284,483
Fair value of expected net future cash flows from servicing recognized at commitment, net
Disaggregation of Revenue
Other sources of revenue	20,997	27,386	58,142	88,357
Loan originations related fees and sales premiums, net
Disaggregation of Revenue
Other sources of revenue	19,083	21,455	52,639	57,719
Mortgage brokerage and debt placement
Disaggregation of Revenue
Revenues from contracts with customers	$ 24,479	$ 41,792	$ 60,955	$ 138,407