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Insurance Operations - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
UPCIC      
Statutory Accounting Practices [Line Items]      
Ordinary dividend capacity accordance with Florida Insurance Code     $ 2,100,000
Dividend paid to immediate parent company $ 0 $ 0  
APPCIC      
Statutory Accounting Practices [Line Items]      
Dividend paid to immediate parent company $ 0 $ 0  
UPCIC and APPCIC      
Statutory Accounting Practices [Line Items]      
Minimum capitalization rate 10.00%    
UPCIC and APPCIC | Minimum      
Statutory Accounting Practices [Line Items]      
Minimum capitalization amount $ 10,000,000.0