Leases - Schedule of Components of Operating Lease Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lease Cost [Line Items]
Total operating lease cost	$ 15,094	$ 14,751	$ 13,196
Occupancy [Member]
Lease Cost [Line Items]
Operating lease cost - office space	11,325	11,034	12,861
Variable lease costs	3,379	3,327	237
Technology and Communications [Member]
Lease Cost [Line Items]
Operating lease cost - equipment	$ 390	$ 390	$ 98