v3.25.4
Cover
Mar. 06, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 06, 2026
Entity File Number 001-37973
Entity Registrant Name NI Holdings, Inc.
Entity Central Index Key 0001681206
Entity Tax Identification Number 81-2683619
Entity Incorporation, State or Country Code ND
Entity Address, Address Line One 1101 First Avenue North
Entity Address, City or Town Fargo
Entity Address, State or Province ND
Entity Address, Postal Zip Code 58102
City Area Code (701)
Local Phone Number 298-4200
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value per share
Trading Symbol NODK
Security Exchange Name NASDAQ
Entity Emerging Growth Company false