Capital markets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue
Mortgage Brokerage and Debt Placement	$ 639,635	$ 527,326	$ 1,195,865	$ 977,469
Total	759,112	633,375	1,424,606	1,179,874
Capital Markets
Disaggregation of Revenue
Total	223,453	162,040	396,980	292,806
Investment Sales
Disaggregation of Revenue
Other sources of revenue	106,623	91,731	199,481	162,554
Fair Value of Expected Net Future Cash Flows from Servicing Recognized at Commitment, Net
Disaggregation of Revenue
Other sources of revenue	24,747	23,395	46,150	39,539
Loan Originations Related Fees and Sales Premiums, Net
Disaggregation of Revenue
Other sources of revenue	26,946	18,654	49,026	35,353
Mortgage Brokerage and Debt Placement
Disaggregation of Revenue
Mortgage Brokerage and Debt Placement	$ 65,137	$ 28,260	$ 102,323	$ 55,360