Transactions with Related Parties - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2023	Dec. 31, 2021
Related Party Transaction [Line Items]
Other income, net	$ 826,000	$ 1,002,000
Cost of services (excluding depreciation and amortization)	166,381,000	117,963,000
Other current liabilities	9,620,000		$ 5,912,000
Prepaid expenses and other current assets	28,196,000		29,688,000
Related Party
Related Party Transaction [Line Items]
Interest income includes interest earned on loans and notes receivable from related parties	0	0
Financing receivable, before allowance for credit loss	11,214,000		11,648,000
Total loans and notes receivable from related parties, net of allowance for credit losses	479,000		913,000
Related Party | Member firm loans
Related Party Transaction [Line Items]
Financing receivable, before allowance for credit loss	11,035,000		11,035,000
Total loans and notes receivable from related parties, net of allowance for credit losses	$ 300,000		300,000
Maturity period	10 years
Related Party | Employee loans
Related Party Transaction [Line Items]
Financing receivable, before allowance for credit loss	$ 179,000		218,000
Total loans and notes receivable from related parties, net of allowance for credit losses	0		$ 200,000
Maturity period			2 years
Related Party | Stewardship Funds Maturing on December 31, 2029
Related Party Transaction [Line Items]
Financing receivable, before allowance for credit loss			$ 100,000	$ 2,000,000.0	$ 2,000,000.0
Financing receivable, term					30 days
Related Party | Stewardship Funds Maturing on December 31, 2033
Related Party Transaction [Line Items]
Financing receivable, before allowance for credit loss	0		300,000
Financing receivable, term				60 days
Related Party | Trademark and License Fees
Related Party Transaction [Line Items]
Other income, net	700,000	800,000
Cost of services (excluding depreciation and amortization)		$ 100,000
Other current liabilities	0		100,000
Related Party | Andersen Global Commitments
Related Party Transaction [Line Items]
Other current liabilities	800,000		600,000
Prepaid expenses and other current assets	5,200,000		4,300,000
Related Party | License Fees and Andersen Global Commitments
Related Party Transaction [Line Items]
Prepaid expenses and other current assets	2,100,000		1,300,000
Reserves related to receivables	3,200,000		3,100,000
Related Party | State Tax Payments
Related Party Transaction [Line Items]
Prepaid expenses and other current assets	$ 2,700,000		$ 2,700,000