XML 104 R82.htm IDEA: XBRL DOCUMENT v3.20.4
Average Historical Loss and LAE Duration, Net of Reinsurance (Detail)
Dec. 31, 2020
Reinsurance Segment | Property  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year One 28.50%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Two 40.30%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Three 17.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Four 6.90%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Five 2.80%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Six 1.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Seven 0.50%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Eight 0.90%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Nine (0.10%)
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Ten 0.10%
Reinsurance Segment | Casualty & Other | Longer Tailed Lines of Business  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year One 4.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Two 8.90%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Three 13.40%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Four 15.60%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Five 13.90%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Six 10.20%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Seven 7.20%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Eight 4.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Nine 3.60%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Ten 1.70%
Reinsurance Segment | Casualty & Other | Shorter Tailed Lines Of Business  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year One 33.50%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Two 27.80%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Three 13.80%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Four 7.00%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Five 4.40%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Six 2.60%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Seven 1.40%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Eight 1.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Nine 0.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Ten 0.30%
Insurance Segment | RSUI | Property Insurance  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year One 38.90%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Two 34.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Three 11.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Four 5.50%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Five 2.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Six 2.30%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Seven 0.60%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Eight 0.60%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Nine 0.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Ten 0.10%
Insurance Segment | RSUI | Casualty Insurance  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year One 3.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Two 15.80%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Three 18.50%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Four 15.90%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Five 10.10%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Six 7.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Seven 4.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Eight 3.20%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Nine 1.30%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Ten 0.50%
Insurance Segment | CapSpecialty Incorporated  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year One 20.70%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Two 22.80%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Three 16.30%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Four 13.30%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Five 9.30%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Six 4.20%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Seven 2.20%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Eight 1.60%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Nine 0.20%
Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance Year Ten 0.00%