Document and Entity Information
Mar. 10, 2022
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001801754
Document Type 8-K
Document Period End Date Mar. 10, 2022
Entity Registrant Name TREAN INSURANCE GROUP, INC.
Entity Incorporation State Country Code DE
Entity File Number 001-39392
Entity Tax Identification Number 84-4512647
Entity Address, Address Line One 150 Lake Street West
Entity Address, City or Town Wayzata
Entity Address, State or Province MN
Entity Address, Postal Zip Code 55391
City Area Code (952)
Local Phone Number 974-2200
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.01 per share
Trading Symbol TIG
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false