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Capital markets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue
Mortgage Brokerage and Debt Placement	$ 714,952	$ 567,976	$ 1,910,815	$ 1,545,446
Total	863,460	685,912	2,288,066	1,865,786
Capital Markets
Disaggregation of Revenue
Total	301,325	188,708	698,305	481,514
Investment Sales
Disaggregation of Revenue
Other sources of revenue	159,860	99,223	359,341	261,777
Fair Value of Expected Net Future Cash Flows from Servicing Recognized at Commitment, Net
Disaggregation of Revenue
Other sources of revenue	40,508	26,220	86,657	65,759
Loan Originations Related Fees and Sales Premiums, Net
Disaggregation of Revenue
Other sources of revenue	32,123	21,070	81,151	56,423
Mortgage Brokerage and Debt Placement
Disaggregation of Revenue
Mortgage Brokerage and Debt Placement	$ 68,834	$ 42,195	$ 171,156	$ 97,555

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