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Note 24 - Subsequent Event - Additional Information (Details Textual) - USD ($)	Jan. 31, 2026	Jan. 27, 2026	Dec. 31, 2025	Dec. 31, 2024
Gray Casualty & Surety Company | Subsequent Event
Subsequent Event [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Combination, Consideration Transferred	$ 311,000
Unsecured Credit Facilities
Subsequent Event [Line Items]
Long-Term Line of Credit		$ 450,000,000
Unsecured Credit Facilities | Subsequent Event
Subsequent Event [Line Items]
Line of Credit Facility, Maturity Date		Jan. 27, 2031
Revolving Credit Facility
Subsequent Event [Line Items]
Long-Term Line of Credit		$ 150,000,000	$ 0	$ 0
Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Line of Credit Facility, Maturity Date		Jan. 27, 2031
Term Loan
Subsequent Event [Line Items]
Long-Term Line of Credit		$ 300,000,000
Term Loan | Subsequent Event
Subsequent Event [Line Items]
Line of Credit Facility, Maturity Date		Jan. 27, 2031

X

- Definition

Percentage of voting equity interest acquired in business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
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-Section 50
-Paragraph 8
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Balance Type:	na
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X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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Balance Type:	credit
Period Type:	duration

X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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X

- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

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Balance Type:	na
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X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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