Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Grouping, Financial Statement Captions
Carrying Value	$ 834.8	$ 837.0
Ark 2021 Subordinated Notes
Balance Sheet Grouping, Financial Statement Captions
Fair Value	176.2	179.2
Carrying Value	159.3	159.7
Kudu Credit Facility
Balance Sheet Grouping, Financial Statement Captions
Fair Value	356.6	365.3
Carrying Value	350.6	350.4
HG Global Senior Notes
Balance Sheet Grouping, Financial Statement Captions
Fair Value	152.0	153.8
Carrying Value	147.9	147.8
Distinguished Credit Facility
Balance Sheet Grouping, Financial Statement Captions
Fair Value	130.9	131.2
Carrying Value	129.6	129.9
Distinguished other debt
Balance Sheet Grouping, Financial Statement Captions
Fair Value	12.9	12.2
Carrying Value	11.2	10.9
Other Operations debt
Balance Sheet Grouping, Financial Statement Captions
Fair Value	36.3	38.0
Carrying Value	$ 36.2	$ 38.3

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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+ Details