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Understanding our Financial Statements and the Impact to the Common Shareholder - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Total revenues	$ 4,419	$ (10,235)	$ 23,026	$ (55,739)
Operating Segments | Ben Liquidity
Related Party Transaction [Line Items]
Total revenues	11,297	11,275	34,124	36,303
Operating Segments | Ben Custody
Related Party Transaction [Line Items]
Total revenues	$ 5,410	$ 5,897	$ 16,178	$ 18,961
Customer ExAlt Trusts
Related Party Transaction [Line Items]
Recurring fee, percentage	2.80%		2.80%
Minimum | Customer ExAlt Trusts
Related Party Transaction [Line Items]
Interest rate	5.00%		5.00%
One time fee, percentage	1.00%		1.00%
Maximum | Customer ExAlt Trusts
Related Party Transaction [Line Items]
Interest rate	14.00%		14.00%
One time fee, percentage	7.00%		7.00%

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