v3.19.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Jul. 31, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name NI Holdings, Inc.  
Entity Central Index Key 0001681206  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Common Stock, Shares Outstanding   22,095,065
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2019  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity File Number 001-37973  
Entity Incorporation, State or Country Code ND  
Document Quarterly Report true  
Document Transition Report false