• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reserves For Losses And Loss Adjustment Expenses [Line Items]      
Unpaid claims and claim adjustment expenses overall development $ 18,707 $ 20,539 $ 8,899
Reserve Strengthening [Member]      
Reserves For Losses And Loss Adjustment Expenses [Line Items]      
Unpaid claims and claim adjustment expenses overall development 16,200    
2015 and 2016 Loss Years [Member      
Reserves For Losses And Loss Adjustment Expenses [Line Items]      
Unpaid claims and claim adjustment expenses overall development 17,869    
Accident Year 2017 [Member] | Hurricane Irma [Member]      
Reserves For Losses And Loss Adjustment Expenses [Line Items]      
Preliminary losses estimated 267,000    
Preliminary net loss estimated 54,000    
Accident Year 2016 [Member] | Hurricane Matthew [Member]      
Reserves For Losses And Loss Adjustment Expenses [Line Items]      
Unpaid claims and claim adjustment expenses overall development $ 2,500