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Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Financial Guarantee Insurance Contracts, Claim Liability [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered		$ 41,225
Financial Guarantee
Financial Guarantee Insurance Contracts, Claim Liability [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered	$ 85,687

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- Definition

Ceded Loss And Loss Expenses Paid Not Yet Recovered

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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