v3.8.0.1
Related Party Transactions - NGHC (Details) - USD ($)
3 Months Ended 9 Months Ended
May 01, 2015
Apr. 01, 2015
Mar. 01, 2010
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Related Party Transaction [Line Items]              
Premiums earned       $ 653,866,000 $ 698,278,000 $ 2,074,475,000 $ 1,951,851,000
National General Holdings Corp. | NGHC Quota Share [Member]              
Related Party Transaction [Line Items]              
Percent participation in quota share by subsidiary     50.00%        
Percentage of net premiums received on personal lines automobile business     25.00%        
Percent of net losses related to premiums of personal lines business assumed by reinsurers     25.00%        
National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement [Member]              
Related Party Transaction [Line Items]              
Reinsurance coverage limit           8,825,000  
Premiums earned       163,000 136,000 403,000 295,000
National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement [Member] | Medical Excess of Loss Reinsurance Agreement [Member]              
Related Party Transaction [Line Items]              
Liability percentage   100.00%          
Reinsurance coverage threshold $ 1,000,000         1,175,000  
Reinsurance coverage limit 4,000,000            
Maximum limit of liability 2,000,000         2,000,000  
Premiums earned       $ 0 $ 0 $ 0 $ 157,000
National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement [Member] | Layer 1 [Member] | Medical Excess of Loss Reinsurance Agreement [Member]              
Related Party Transaction [Line Items]              
Reinsurance coverage threshold 1,000,000            
Reinsurance coverage limit 1,000,000            
National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement [Member] | Layer 2 [Member] | Medical Excess of Loss Reinsurance Agreement [Member]              
Related Party Transaction [Line Items]              
Reinsurance coverage threshold 2,000,000            
Reinsurance coverage limit 3,000,000            
National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement [Member] | Layer 3 [Member] | Medical Excess of Loss Reinsurance Agreement [Member]              
Related Party Transaction [Line Items]              
Reinsurance coverage threshold 5,000,000            
Reinsurance coverage limit $ 5,000,000