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Cover Page Document
Jan. 09, 2024
Document Information [Line Items]  
Amendment Flag false
Document Type 8-K
Document Period End Date Jan. 09, 2024
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Title of 12(b) Security Common stock, $0.0001 par value per share
Entity Registrant Name AMERICAN COASTAL INSURANCE CORPORATION
Entity Incorporation, State or Country Code DE
Entity File Number 001-35761
Entity Tax Identification Number 75-3241967
Entity Address, Address Line One 800 2nd Avenue S.
Entity Address, Postal Zip Code 33701
Entity Address, City or Town Saint Petersburg,
Entity Address, State or Province FL
City Area Code (727)
Local Phone Number 633-0851
Trading Symbol ACIC
Security Exchange Name NASDAQ
Entity Central Index Key 0001401521