v3.21.2
Reserve for Loss and Loss Adjustment Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Insurance [Abstract]            
Reserve for reported loss and LAE $ 906,833   $ 906,833   $ 998,691  
Reserve for losses incurred but not reported ("IBNR") 767,757   767,757   894,608  
Reserve for loss and LAE 1,674,590 $ 2,071,222 1,674,590 $ 2,071,222 1,893,299 $ 2,439,907
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]            
Reserve for loss and LAE 1,674,590 2,071,222 1,674,590 2,071,222 1,893,299 2,439,907
Less: reinsurance recoverable on unpaid losses, January 1     592,571 623,422    
Liability for Unpaid Claims and Claims Adjustment Expense, Net, Total 1,109,041 1,453,726 1,109,041 1,453,726 $ 1,300,728 $ 1,816,485
Net incurred losses related to Current year     15,393 32,687    
Net incurred losses related to Prior year     (18,361) (593)    
Net loss and loss adjustment expenses (5,327) 11,008 (2,968) 32,094    
Net paid losses related to Current year     8,479 (1,832)    
Net paid losses related to Prior years     (206,708) (387,023)    
Net paid losses     (198,229) (388,855)    
Retroactive reinsurance adjustment     20,687 1,410    
Effect of foreign exchange rate movements     (11,177) (7,408)    
Net loss and LAE reserves, June 30 1,109,041 1,453,726 1,109,041 1,453,726    
Reinsurance recoverable on unpaid losses, June 30 565,549 617,496 565,549 617,496    
Gross loss and LAE reserves, June 30 1,674,590 2,071,222 1,674,590 2,071,222    
Segment Reporting Information [Line Items]            
Net adverse prior year development (net favorable prior year reserve development) (12,807) (60) (18,361) (593)    
AmTrust Quota Share Reinsurance Segment            
Segment Reporting Information [Line Items]            
Deferred gain on retroactive reinsurance, increase (decrease)     (20,687)      
Diversified Reinsurance            
Segment Reporting Information [Line Items]            
Net adverse prior year development (net favorable prior year reserve development) (951) 362 (937) (171)    
AmTrust Reinsurance            
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]            
Less: reinsurance recoverable on unpaid losses, January 1     519,941      
Reinsurance recoverable on unpaid losses, June 30 499,254   499,254      
Segment Reporting Information [Line Items]            
Net adverse prior year development (net favorable prior year reserve development) $ (11,856) $ (422) $ (17,424) $ (422)