Net Capital Requirement (Details) $ in Thousands	Sep. 30, 2026 USD ($)
Lincoln International LLC
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Regulatory net capital	$ 35,700
Minimum regulatory net capital requirement	13,600
Amount in excess of minimum net capital requirement	$ 22,100
Aggregate indebtedness to net capital ratio	5.7
MarshBerry Capital, LLC
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Regulatory net capital	$ 4,200
Minimum regulatory net capital requirement	40
Amount in excess of minimum net capital requirement	$ 4,200
Aggregate indebtedness to net capital ratio	0.1