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Insurance Operations - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2012
Jun. 30, 2013
Dec. 31, 2011
Dec. 31, 2012
Mar. 31, 2012
Previous Accounting Guidance [Member]
Mar. 31, 2012
Adjustments for New Accounting Pronouncement [Member]
Jun. 30, 2013
American Platinum Property and Casualty Insurance Company [Member]
State
Jun. 30, 2013
Universal Property and Casualty Insurance Company [Member]
State
Jun. 30, 2013
UPCIC and APPCIC [Member]
Jun. 30, 2013
UPCIC and APPCIC [Member]
Statutory Accounting Practices [Line Items]                    
Number of states in which home owners insurance operates             1 7    
Deferred policy acquisition costs, net, difference percentage     13.00%              
Deferred policy acquisition costs, pre-tax charge against earnings $ 1,600,000                  
Capitalized costs amortization period   12 months                
Deferred policy acquisition costs, net   17,241,000   17,282,000 9,000,000 5,600,000        
Maximum dividend without prior approval is limited, Percent of statutory unassigned surplus   10.00%                
Maximum dividend paid by UPCIC and APPCIC   The maximum dividend that may be paid by UPCIC and APPCIC to their immediate parent company, Universal Insurance Holding Company of Florida ("UIHCF"), without prior approval is limited to the lesser of statutory net income from operations of the preceding calendar year or 10.0% of statutory unassigned surplus as of the preceding year end.                
Dividend paid to UIHCF                 0 0
Minimum capitalization rate                   10.00%
Capitalization maintained by the company                 5,000,000 5,000,000
Minimum capital required                 Greater of ten percent of the insurer's total liabilities or $5.0 million Greater of ten percent of the insurer's total liabilities or $5.0 million
Financial Penalties   $ 1,300,000