Capital markets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue
Mortgage Brokerage and Debt Placement	$ 2,770,302	$ 2,272,989	$ 2,072,839
Total	3,294,024	2,738,502	2,470,368
Capital Markets
Disaggregation of Revenue
Total	1,047,229	774,186	659,896
Investment Sales
Disaggregation of Revenue
Other sources of revenue	559,392	417,684	381,276
Fair Value of Expected Net Future Cash Flows from Servicing Recognized at Commitment, Net
Disaggregation of Revenue
Other sources of revenue	122,833	100,171	82,082
Loan Originations Related Fees and Sales Premiums, Net
Disaggregation of Revenue
Other sources of revenue	110,754	91,645	69,604
Mortgage Brokerage and Debt Placement
Disaggregation of Revenue
Mortgage Brokerage and Debt Placement	$ 254,250	$ 164,686	$ 126,934