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Derivatives | 12 Months Ended
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Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivatives | Derivatives HG Global Interest Rate Caps HG Global entered into two interest rate cap agreements to limit its exposure to the risk of interest rate increases on the HG Global Senior Notes. On June 16, 2022, HG Global entered into the HG Global 2022 Interest Rate Cap, effective on July 25, 2022. The notional amount of the HG Global 2022 Interest Rate Cap was $150.0 million, and the termination date was July 25, 2025. HG Global paid an initial premium of $3.3 million for the HG Global 2022 Interest Rate Cap. On August 22, 2024, HG Global entered into the HG Global 2024 Interest Rate Cap, which became effective upon the termination of the HG Global 2022 Interest Rate Cap on July 25, 2025. The initial notional amount of the HG Global 2024 Interest Rate Cap is $150.0 million, and the termination date is July 25, 2028. For interest periods after April 26, 2027, the notional amount of the HG Global 2024 Interest Rate Cap will decrease as the outstanding principal of the HG Global Senior Notes is paid down. HG Global paid an initial premium of $1.3 million for the HG Global 2024 Interest Rate Cap. Under the HG Global 2022 Interest Rate Cap, if the three-month SOFR on a quarterly determination date exceeded 3.5% through July 25, 2025, HG Global received a payment from the counterparty for the difference on the subsequent settlement date. For the years ended December 31, 2025 and 2024, HG Global received $1.0 million and $2.8 million related to the periodic settlement of the HG Global 2022 Interest Rate Cap. Under the HG Global 2024 Interest Rate Cap, if the three-month SOFR on a quarterly determination date exceeds 4.5% between July 25, 2025 and July 25, 2028, HG Global will receive a payment from the counterparty for the difference on the subsequent settlement date. As of December 31, 2025, the three-month SOFR was 3.7%. For the year ended December 31, 2025, HG Global did not receive any payments related to the periodic settlement of the HG Global 2024 Interest Rate Cap. HG Global accounts for the HG Global Interest Rate Caps as derivatives at fair value within other assets, with changes in fair value recognized in current period earnings within interest expense. For the year ended December 31, 2025, HG Global recognized a net unrealized loss of $2.3 million related to the change in fair value of both interest rate caps within interest expense. For the year ended December 31, 2024, HG Global recognized a net unrealized loss of $1.7 million related to the change in fair value of both interest rate caps within interest expense. As of December 31, 2025, the fair value of the HG Global 2024 Interest Rate Cap was $0.2 million. As of December 31, 2024, the total fair value of both interest rate caps was $2.5 million. White Mountains classifies the HG Global Interest Rate Caps as Level 2 measurements. Kudu Interest Rate Cap On September 17, 2024, Kudu entered into the Kudu Interest Rate Cap, effective on September 30, 2024, to limit its exposure to the risk of interest rate increases on the Kudu Credit Facility. The notional amount of the Kudu Interest Rate Cap is $150.0 million, and the termination date is September 30, 2027. Kudu paid an initial premium of $0.9 million for the Kudu Interest Rate Cap. Under the Kudu Interest Rate Cap, if the three-month SOFR on a quarterly determination date exceeds 4.5%, Kudu will receive a payment from the counterparty for the difference on the subsequent settlement date. As of December 31, 2025, the three-month SOFR was 3.7%. For the year ended December 31, 2025, Kudu did not receive any payments related to the periodic settlement of the Kudu Interest Rate Cap. For the year ended December 31 2024, Kudu received $0.1 million related to the periodic settlement of the Kudu Interest Rate Cap. Kudu accounts for the Kudu Interest Rate Cap as a derivative at fair value within other assets, with changes in fair value recognized in current period earnings within interest expense. For the years ended December 31, 2025 and 2024, Kudu recognized a loss of $0.9 million and a gain of $0.4 million related to the change in fair value on the Kudu Interest Rate Cap within interest expense. As of December 31, 2025 and 2024, the fair value of the Kudu Interest Rate Cap was $0.0 million and $0.9 million. White Mountains classifies the Kudu Interest Rate Cap as a Level 2 measurement. Distinguished Interest Rate Cap On September 16, 2025, Distinguished entered into the Distinguished Interest Rate Cap to limit its exposure to the risk of interest rate increases on the Distinguished Credit Facility. The notional amount of the Distinguished Interest Rate Cap is $70.0 million, and the termination date is September 16, 2028. Distinguished paid an initial premium of $0.2 million for the Distinguished Interest Rate Cap. Under the Distinguished Interest Rate Cap, if the one-month SOFR on a monthly determination date exceeds 5.0%, Distinguished will receive a payment from the counterparty for the difference on the subsequent settlement date. As of December 31, 2025, the one-month SOFR was 3.7%. Distinguished accounts for the Distinguished Interest Rate Cap as a derivative at fair value within other assets, with changes in fair value recognized in current period earnings within interest expense. For the period from September 2, 2025, the date of acquisition, through December 31, 2025, Distinguished recognized no gain or loss related to the change in fair value on the Distinguished Interest Rate Cap. As of December 31, 2025, the fair value of the Distinguished Interest Rate Cap was $0.1 million. White Mountains classifies the Distinguished Interest Rate Cap as a Level 2 measurement.

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