Capital markets (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
Mortgage brokerage and debt placement	$ 567,976	$ 513,151	$ 1,545,446	$ 1,432,292
Total	685,912	616,283	1,865,786	1,722,926
Capital markets
Disaggregation of Revenue
Total	188,708	159,266	481,514	416,040
Investment sales
Disaggregation of Revenue
Other sources of revenue	99,223	94,707	261,777	244,304
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
Mortgage brokerage and debt placement
Disaggregation of Revenue
Mortgage brokerage and debt placement	$ 42,195	$ 24,479	$ 97,555	$ 60,955