Employee Compensation and Benefit Plan - Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits [Line Items]
Total compensation payable	$ 214,041	$ 138,404
Compensation payable
Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits [Line Items]
Total compensation payable	210,879	134,648
Accrued profit sharing payable
Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits [Line Items]
Total compensation payable	$ 3,162	$ 3,756