XML 114 R93.htm IDEA: XBRL DOCUMENT v3.10.0.1
Liability for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Claims Development [Line Items]        
Prior year claims and claims adjustment expense $ 99,522,000 $ 27,499,000 $ (4,690,000)  
Increase of unpaid losses and loss adjustment expenses 224,404,000 189,931,000 (40,346,000)  
Unpaid losses and loss adjustment expenses 472,829,000 248,425,000 $ 58,494,000 $ 98,840,000
Reinsurance recoverable $ 418,603,000 182,405,000    
Insurance claim maximum settlement time 1 year      
Initial case reserve for claims $ 2,500      
LAE case reserves 0      
Subrogation        
Claims Development [Line Items]        
Reserve for losses and loss adjustment expenses 99,000,000 $ 85,000,000    
Hurricane        
Claims Development [Line Items]        
Increase of unpaid losses and loss adjustment expenses $ 14,800,000