• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Losses and Loss Adjustment Expenses - Schedule of Incurred and Paid Claims Development (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Claims
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 504,617          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 422,450          
All outstanding liabilities before 2012, net of reinsurance 538          
Liabilities for losses and loss adjustment, net of reinsurance 82,705          
Homeowners Wind-only Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 3,411          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 2,103          
Liabilities for losses and loss adjustment, net of reinsurance 1,308          
Any Hurricane Prior to 2017 [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 24,297          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 20,188          
Liabilities for losses and loss adjustment, net of reinsurance 4,109          
Hurricane Irma [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 53,430          
Total of IBNR Plus Expected Development on Reported Claims $ 9,614          
Cumulative Number of Reported Claims | Claims 17,862          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 43,742          
Liabilities for losses and loss adjustment, net of reinsurance 9,688          
Accident Year 2012 [Member] | Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 66,465 $ 67,058 $ 66,505 $ 64,083 $ 62,742 $ 66,425
Total of IBNR Plus Expected Development on Reported Claims $ 155          
Cumulative Number of Reported Claims | Claims 6,617          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 65,903 64,667 62,836 59,041 53,225 $ 36,914
Accident Year 2013 [Member] | Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 71,604 72,020 69,906 69,932 67,579  
Total of IBNR Plus Expected Development on Reported Claims $ 540          
Cumulative Number of Reported Claims | Claims 7,003          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 70,224 68,106 64,257 57,374 $ 40,240  
Accident Year 2014 [Member] | Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 88,054 84,917 81,773 75,810    
Total of IBNR Plus Expected Development on Reported Claims $ 2,350          
Cumulative Number of Reported Claims | Claims 7,649          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 82,463 77,712 68,897 $ 47,650    
Accident Year 2015 [Member] | Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 96,173 90,902 78,017      
Total of IBNR Plus Expected Development on Reported Claims $ 4,398          
Cumulative Number of Reported Claims | Claims 7,627          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 87,784 76,042 50,939      
Accident Year 2015 [Member] | Homeowners Wind-only Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 569 401 308      
Total of IBNR Plus Expected Development on Reported Claims $ 2          
Cumulative Number of Reported Claims | Claims 100          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 464 332 $ 156      
Accident Year 2016 [Member] | Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 90,878 81,446        
Total of IBNR Plus Expected Development on Reported Claims $ 12,840          
Cumulative Number of Reported Claims | Claims 6,863          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 73,037 51,663        
Accident Year 2016 [Member] | Homeowners Wind-only Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 1,314 1,005        
Total of IBNR Plus Expected Development on Reported Claims $ 41          
Cumulative Number of Reported Claims | Claims 228          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 1,155 689        
Accident Year 2016 [Member] | Any Hurricane Prior to 2017 [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 24,126 21,414        
Total of IBNR Plus Expected Development on Reported Claims $ 3,435          
Cumulative Number of Reported Claims | Claims 2,410          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 20,025 $ 12,227        
Accident Year 2017 [Member] | Homeowners Multi-peril and Dwelling Fire Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 91,443          
Total of IBNR Plus Expected Development on Reported Claims $ 37,388          
Cumulative Number of Reported Claims | Claims 5,325          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 43,039          
Accident Year 2017 [Member] | Homeowners Wind-only Insurance [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance 1,528          
Total of IBNR Plus Expected Development on Reported Claims $ 866          
Cumulative Number of Reported Claims | Claims 144          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 484          
Accident Year 2017 [Member] | Any Hurricane Prior to 2017 [Member]            
Claims Development [Line Items]            
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 171          
Cumulative Number of Reported Claims | Claims 113          
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance $ 163