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Property and Casualty Insurance Activity (Details 2)
 3 Months Ended
Mar. 31, 2021
USD ($)
integer
2012 incurred claims $ 10,885,000
2013 incurred claims 10,511,000
2014 incurred claims 16,414,000
2015 incurred claims 23,359,000
2016 incurred claims 27,857,000
2017 incurred claims 36,186,000
2018 incurred claims 58,511,000
2019 incurred claims 72,371,000
2020 incurred claims 63,014,000
Total incurred claims 340,551,000
2021 incurred claims 21,443,000
Two Thousand Twelve Member  
2012 incurred claims 9,539,000
IBNR $ 13,000
Cumulative Number of Reported Claims | integer 4,704
Two Thousand Thirteen Member  
2012 incurred claims $ 9,344,000
2013 incurred claims 10,728,000
IBNR $ 4,000
Cumulative Number of Reported Claims | integer 1,564
Two Thousand Fourteen Member  
2012 incurred claims $ 10,278,000
2013 incurred claims 9,745,000
2014 incurred claims 14,193,000
IBNR $ 180,000
Cumulative Number of Reported Claims | integer 2,138
Two Thousand Fifteen Member  
2012 incurred claims $ 10,382,000
2013 incurred claims 9,424,000
2014 incurred claims 14,260,000
2015 incurred claims 22,340,000
IBNR $ 95,000
Cumulative Number of Reported Claims | integer 2,557
Two Thousand Sixteen Member  
2012 incurred claims $ 10,582,000
2013 incurred claims 9,621,000
2014 incurred claims 14,218,000
2015 incurred claims 21,994,000
2016 incurred claims 26,062,000
IBNR $ 512,000
Cumulative Number of Reported Claims | integer 2,878
Two Thousand Seventeen Member  
2012 incurred claims $ 10,790,000
2013 incurred claims 10,061,000
2014 incurred claims 14,564,000
2015 incurred claims 22,148,000
2016 incurred claims 24,941,000
2017 incurred claims 31,605,000
IBNR $ 400,000
Cumulative Number of Reported Claims | integer 3,393
Two Thousand Eighteen Member  
2012 incurred claims $ 10,791,000
2013 incurred claims 10,089,000
2014 incurred claims 15,023,000
2015 incurred claims 22,491,000
2016 incurred claims 24,789,000
2017 incurred claims 32,169,000
2018 incurred claims 54,455,000
2019 incurred claims 11,015,000
IBNR $ 1,963,000
Cumulative Number of Reported Claims | integer 4,215
Two Thousand Nineteen Member  
2012 incurred claims $ 11,015,000
2013 incurred claims 10,607,000
2014 incurred claims 16,381,000
2015 incurred claims 23,386,000
2016 incurred claims 27,887,000
2017 incurred claims 35,304,000
2018 incurred claims 56,351,000
2019 incurred claims 75,092,000
IBNR $ 8,809,000
Cumulative Number of Reported Claims | integer 4,453
Two Thousand Twenty Member  
2012 incurred claims $ 10,885,000
2013 incurred claims 10,495,000
2014 incurred claims 16,428,000
2015 incurred claims 23,291,000
2016 incurred claims 27,966,000
2017 incurred claims 36,160,000
2018 incurred claims 58,441,000
2019 incurred claims 72,368,000
2020 incurred claims 63,083,000
IBNR $ 8,473,000
Cumulative Number of Reported Claims | integer 5,772
Two Thousand Twenty One Member  
IBNR $ 7,581,000
Cumulative Number of Reported Claims | integer 816