v3.26.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2026
Nov. 03, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Trading Symbol HCI  
Entity Registrant Name HCI Group, Inc.  
Entity Central Index Key 0001400810  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(b) Security Common Shares  
Security Exchange Name NYSE  
Entity File Number 001-34126  
Entity Incorporation, State or Country Code FL  
Entity Tax Identification Number 20-5961396  
Entity Address, Address Line One 3802 Coconut Palm Drive  
Entity Address, City or Town Tampa  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33619  
City Area Code 877  
Local Phone Number 304-9394  
Document Quarterly Report true  
Document Transition Report false  
Entity Common Stock, Shares Outstanding   12,430,682