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Understanding our Financial Statements and the Impact to the Common Shareholder - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Related Party Transaction [Line Items]
Total revenues	$ (12,623)	$ 10,046
Operating Segments | Ben Liquidity
Related Party Transaction [Line Items]
Total revenues	8,837	10,849
Operating Segments | Ben Custody
Related Party Transaction [Line Items]
Total revenues	$ 4,183	$ 5,382
Customer ExAlt Trusts
Related Party Transaction [Line Items]
Recurring fee, percentage	2.80%
Minimum | Customer ExAlt Trusts
Related Party Transaction [Line Items]
Interest rate	5.00%
One time fee, percentage	1.00%
Maximum | Customer ExAlt Trusts
Related Party Transaction [Line Items]
Interest rate	14.00%
One time fee, percentage	7.00%

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