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Schedule III - Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2023
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract] |
Schedule III - Supplementary Insurance Information | SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION For the Twelve Months Ended December 31, 2023, 2022 and 2021 Supplementary Information ($ in millions)
Year Ended December 31, 2023 |  | Deferred Policy Acquisition Costs |  | Net Reserves for Losses and LAE |  | Net Reserves for Unearned Premiums |  | Net Earned Premiums |  | Net Investment Income |  | Losses and LAE Expenses |  | Policy Acquisition Expenses |  | Net Written Premiums |  | General and Administrative Expenses
Reinsurance |  | $ | 201.5 |  |  | $ | 1,373.1 |  |  | $ | 644.5 |  |  | $ | 1,154.5 |  |  |  |  | $ | 611.1 |  |  | $ | 208.6 |  |  | $ | 1,098.0 |  |  | $ | 120.6 |
Insurance |  | 94.7 |  |  | 1,859.7 |  |  | 1,048.3 |  |  | 1,460.0 |  |  |  |  | 941.9 |  |  | 171.6 |  |  | 1,483.9 |  |  | 233.9 |
Total |  | $ | 296.2 |  |  | $ | 3,232.8 |  |  | $ | 1,692.8 |  |  | $ | 2,614.5 |  |  | $ | 275.7 |  |  | $ | 1,553.0 |  |  | $ | 380.2 |  |  | $ | 2,581.9 |  |  | $ | 354.5 |
Year to date December 31, 2022 |  | Deferred Policy Acquisition Costs |  | Net Reserves for Losses and LAE |  | Net Reserves for Unearned Premiums |  | Net Earned Premiums |  | Net Investment Income |  | Losses and LAE Expenses |  | Policy Acquisition Expenses |  | Net Written Premiums |  | General and Administrative Expenses
Reinsurance |  | $ | 227.2 |  |  | $ | 1,360.7 |  |  | $ | 862.4 |  |  | $ | 1,251.8 |  |  |  |  | $ | 770.3 |  |  | $ | 252.4 |  |  | $ | 1,426.4 |  |  | $ | 142.5 |
Insurance |  | 91.8 |  |  | 1,452.5 |  |  | 857.8 |  |  | 1,436.9 |  |  |  |  | 909.7 |  |  | 179.4 |  |  | 1,469.6 |  |  | 244.0 |
Total |  | $ | 319.0 |  |  | $ | 2,813.2 |  |  | $ | 1,720.2 |  |  | $ | 2,688.7 |  |  | $ | 188.1 |  |  | $ | 1,680.0 |  |  | $ | 431.8 |  |  | $ | 2,896.0 |  |  | $ | 386.5 |
Year to date December 31, 2021 |  | Deferred Policy Acquisition Costs |  | Net Reserves for Losses and LAE |  | Net Reserves for Unearned Premiums |  | Net Earned Premiums |  | Net Investment Income |  | Losses and LAE Expenses |  | Policy Acquisition Expenses |  | Net Written Premiums |  | General and Administrative Expenses
Reinsurance |  | $ | 205.2 |  |  | $ | 2,148.4 |  |  | $ | 688.6 |  |  | $ | 1,118.8 |  |  |  |  | $ | 705.2 |  |  | $ | 221.6 |  |  | $ | 1,199.0 |  |  | $ | 121.3 |
Insurance |  | 85.6 |  |  | 2,165.3 |  |  | 827.6 |  |  | 1,291.7 |  |  |  |  | 988.1 |  |  | 192.5 |  |  | 1,388.7 |  |  | 211.8 |
Total |  | $ | 290.8 |  |  | $ | 4,313.7 |  |  | $ | 1,516.2 |  |  | $ | 2,410.5 |  |  | $ | 147.5 |  |  | $ | 1,693.3 |  |  | $ | 414.1 |  |  | $ | 2,587.7 |  |  | $ | 333.1 |

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- Definition The entire disclosure for supplementary insurance information by segment. Includes, but is not limited to, deferred policy acquisition cost; future policy benefit, loss, claim and loss expenses; unearned premium; other policy claim and benefit payable; premium revenue; net investment income; benefit, claim, loss and settlement expenses; amortization of deferred policy acquisition cost; other operating expense; and premium written. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 16 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16(Column G)(Footnote 3)) -SubTopic 235 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480149/944-235-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16(Column J)(Footnote 3)) -SubTopic 235 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480149/944-235-S99-1 + Details
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