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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 22, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-33251    
Entity Registrant Name UNIVERSAL INSURANCE HOLDINGS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 65-0231984    
Entity Address, Address Line One 1110 W. Commercial Blvd.    
Entity Address, City or Town Fort Lauderdale    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33309    
City Area Code 954    
Local Phone Number 958-1200    
Title of 12(b) Security Common Stock, $0.01 Par Value    
Trading Symbol UVE    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 505,691,628
Entity Common Stock, Shares Outstanding   31,205,653  
Documents Incorporated by Reference The information required by Part III of this Annual Report on Form 10-K, to the extent not set forth herein, is incorporated herein by reference to the registrant’s definitive proxy statement relating to the Annual Meeting of Shareholders to be held in 2021, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates.    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000891166