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Liability for Unpaid Losses and Loss Adjustment Expenses (Tables)
 12 Months Ended
Dec. 31, 2021
Liability for Unpaid Losses and Loss Adjustment Expenses [Abstract]  
Changes in the liability for unpaid losses and LAE table
The following table represents a reconciliation of changes in the liability for unpaid losses and LAE.
Years Ended December 31,
202120202019
(in millions)
Unpaid losses and LAE at beginning of period$2,069.4 $2,192.8 $2,207.9 
Less reinsurance recoverable, excluding CECL allowance, on unpaid losses and LAE497.0 532.5 504.4 
Net unpaid losses and LAE at beginning of period1,572.4 1,660.3 1,703.5 
Losses and LAE, net of reinsurance, incurred during the period related to:
Current year366.5 395.9 456.1 
Prior years(39.8)(81.6)(77.5)
Total net losses and LAE incurred during the period326.7 314.3 378.6 
Paid losses and LAE, net of reinsurance, related to:
Current year76.6 83.6 106.6 
Prior years318.2 318.6 315.2 
Total net paid losses and LAE during the period394.8 402.2 421.8 
Ending unpaid losses and LAE, net of reinsurance1,504.3 1,572.4 1,660.3 
Reinsurance recoverable, excluding CECL allowance, on unpaid losses and LAE476.9 497.0 532.5 
Unpaid losses and LAE at end of period$1,981.2 $2,069.4 $2,192.8 
Short-duration Insurance Contracts, Claims Development [Table Text Block]
The Company analyzed the usefulness of disaggregation of its results and determined the characteristics associated with the policies and the related unpaid loss reserves, incurred losses, and payment patterns are similar in nature. As such, the following tables show the Company's historical incurred and cumulative paid losses and LAE development, net of reinsurance, as well as IBNR loss reserves and the number of reported claims on an aggregated basis as of December 31, 2021 for each of the previous 10 accident years.
Incurred Losses and LAE, Net of Reinsurance
Years Ended December 31,As of December 31, 2021
Accident Year
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021IBNRCumulative number of reported claims
(in millions, except claims counts)
2012$348.8 $359.9 $360.9 $386.4 $388.2 $382.8 $379.8 $378.5 $372.4 $369.4 $23.5 26,046 
2013452.6 460.6 478.6 472.6 468.9 464.6 459.3 446.8 440.9 28.2 28,927 
2014463.4 445.8 432.9 434.6 430.5 424.7 415.5 406.0 34.6 28,594 
2015422.2 425.8 423.9 419.6 408.7 396.7 384.9 33.4 27,264 
2016419.0 414.6 395.4 375.0 364.6 354.8 35.6 25,806 
2017412.4 391.3 358.3 337.9 329.8 43.0 25,091 
2018422.5 424.6 407.7 400.6 52.2 27,977 
2019422.4 435.7 448.5 83.2 32,885 
2020365.7 374.0 94.6 23,948 
2021339.2 163.0 19,287 
Total$3,848.0 
Cumulative Paid Losses and LAE, Net of Reinsurance
Years Ended December 31,
Accident Year
2012(1)
2013(1)
2014(1)
2015(1)
2016(1)
2017(1)
2018(1)
2019(1)
2020(1)
2021
(in millions)
2012$58.6 $148.3 $214.2 $261.4 $289.9 $305.0 $316.9 $324.3 $328.4 $332.3 
201368.5 184.4 263.8 317.4 346.1 365.9 379.3 386.6 391.3 
201465.3 172.7 248.9 297.2 323.4 342.1 351.4 357.7 
201565.5 174.5 246.9 290.5 311.2 322.2 329.3 
201665.6 166.8 227.7 261.2 278.3 290.0 
201763.5 160.2 215.7 243.7 260.0 
201877.9 189.9 254.2 293.6 
201988.8 212.6 285.2 
202071.9 175.6 
202166.1 
Total$2,781.1 
All outstanding liabilities for unpaid losses and LAE prior to 2012, net of reinsurance374.4 
Total outstanding liabilities for unpaid losses and LAE, net of reinsurance$1,441.3 
(1)Data presented for these calendar years is required supplementary information, which is unaudited.
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block]
The following table represents a reconciliation of claims development to the aggregate carrying amount of the liability for unpaid losses and LAE:
December 31, 2021
(in millions)
Liabilities for unpaid losses and LAE, net of reinsurance$1,441.3 
Reinsurance recoverable, excluding CECL allowance, on unpaid losses476.9 
Unallocated LAE (adjusting and other)63.0 
Total liability for unpaid losses and LAE$1,981.2 
Short-duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block]
The following table presents the average annual percentage payout of incurred claims by age, net of reinsurance, as of December 31, 2021 and is presented as required supplementary information, which is unaudited:
Average Annual Percentage Payout of Claims by Age, Net of Reinsurance
Year 1Year 2Year 3Year 4Year 5Year 6Year 7Year 8Year 9Year 10
18.0 %27.4 %17.5 %10.8 %6.0 %3.9 %2.6 %1.7 %1.1 %1.1 %