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Related Party Transactions | 12 Months Ended
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Dec. 31, 2024
Related Party Transactions [Abstract] |
Related Party Transactions [Text Block] | 18. Related Party Transactions The Company engages in certain related party transactions in the normal course of business at arm's length. Fund Management Within the Company's insurance-linked securities operations, the Company provides investment and insurance management services through Nephila Holdings Ltd. (together with its subsidiaries, Nephila). Nephila serves as the investment manager to several Bermuda based private funds (the Nephila Funds). To provide access for the Nephila Funds to a variety of insurance-linked securities in the property catastrophe, climate and specialty markets, Nephila also acts as an insurance manager to certain Bermuda licensed reinsurers and as the managing agent to Lloyd's Syndicate 2357 and Lloyd's Syndicate 2358 (collectively, the Nephila Reinsurers). Neither the Nephila Funds nor the Nephila Reinsurers are consolidated by the Company. Nephila receives management fees for its investment and insurance management services based on either the net asset value of the accounts managed or gross premium volume for the underlying risks to which the investors subscribed. Nephila also may earn incentive fees from certain funds based on annual performance. For the years ended December 31, 2024, 2023 and 2022, total fund management revenues attributed to unconsolidated entities managed by Nephila were $94.6 million, $97.6 million and $74.3 million, respectively. Program Services and ILS Fronting Through the Company's program services and ILS fronting operations, the Company has programs with the Nephila Reinsurers through which the Company writes insurance policies that are fully ceded to the Nephila Reinsurers in exchange for fronting fees. Through these programs, Nephila utilizes certain of the Company's licensed insurance companies to write a portion of its portfolio of U.S. catastrophe-exposed property and specialty risks. A portion of this business is placed by Velocity, a managing general agent in which the Company has a minority interest. Gross premiums written through the Company's program services and ILS operations that were ceded to the Nephila Reinsurers were $1.3 billion, $1.1 billion and $1.0 billion for the years ended December 31, 2024, 2023 and 2022, respectively, for which the Company earned fronting fees totaling $39.4 million, $34.7 million and $37.0 million, respectively. As of December 31, 2024 and 2023, reinsurance recoverables on the consolidated balance sheets included $968.9 million and $794.3 million, respectively, due from Nephila Reinsurers. Under its programs with Nephila Reinsurers, the Company bears underwriting risk for annual aggregate agreement year losses in excess of a limit the Company believes is unlikely to be exceeded. To the extent losses under these programs exceed the prescribed limits, the Company is obligated to pay such losses to the cedents without recourse to the Nephila Reinsurers. While the Company believes losses under these programs are unlikely, those losses, if incurred, could be material to the Company's consolidated results of operations and financial condition. Beginning in 2024, in order for the Nephila Reinsurers to obtain reinsurance protection for a portion of their exposures, the Company also fronted ceded reinsurance contracts, primarily in the form of industry loss warranties, for the Nephila Reinsurers. Through this arrangement, the underlying risk of the Nephila Reinsurers was retroceded back to the Company and then fully ceded to third-party reinsurers. In 2024, the Company's gross written premiums from the Nephila Reinsurers under this ILS fronting program were $168.0 million, all of which were ceded to third parties. The Company has also entered into other assumed and ceded reinsurance transactions with the Nephila Reinsurers in the normal course of business, which are not material to the Company's consolidated financial statements. Hagerty The Company holds a minority ownership interest in Hagerty, which operates primarily as a managing general agent and also includes Hagerty Reinsurance Limited (Hagerty Re), a Bermuda Class 3 reinsurance company. Through the Company's underwriting operations, the Company underwrites insurance for Hagerty, a portion of which is ceded to Hagerty Re. The amounts attributed to these arrangements are summarized in the following table.
| Years Ended December 31,
(dollars in thousands) | 2024 |  | 2023 |  | 2022
Gross written premiums attributable to Hagerty | $ | 922,657 |  |  | $ | 805,673 |  |  | $ | 689,670 |
Premiums ceded to Hagerty Re | $ | 708,147 |  |  | $ | 616,491 |  |  | $ | 456,637 |
As of December 31, 2024 and 2023, reinsurance recoverables on the consolidated balance sheets included $308.8 million and $214.8 million, respectively, due from Hagerty Re.

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(e)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/850/tableOfContent Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-6 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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