Transactions with Related Parties - Schedule of Related Party Transactions (Details) - Related Party - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total loans and notes receivable from related parties	$ 11,648	$ 11,231
Allowance for credit loss	(10,735)	(8,611)	$ (4,940)	$ (4,440)
Total loans and notes receivable from related parties, net of allowance for credit losses	913	2,620
Member firm loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total loans and notes receivable from related parties	11,035	10,943
Total loans and notes receivable from related parties, net of allowance for credit losses	300	2,300
Employee loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total loans and notes receivable from related parties	218	288
Total loans and notes receivable from related parties, net of allowance for credit losses	200	100
Stewardship funds
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total loans and notes receivable from related parties	$ 395	$ 0