Business Changes and Developments - Intangible Assets Associated with Acquisitions (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 33,817
Accumulated Amortization	3,727
Client Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	22,904
Accumulated Amortization	1,909
Advisory Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,913
Accumulated Amortization	1,818
Investment Banking & Equities
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,817
Accumulated Amortization	3,727
Investment Banking & Equities | Client Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	22,904
Accumulated Amortization	1,909
Investment Banking & Equities | Advisory Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,913
Accumulated Amortization	1,818
Investment Management
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0
Accumulated Amortization	0
Investment Management | Client Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0
Accumulated Amortization	0
Investment Management | Advisory Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0
Accumulated Amortization	$ 0