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Insurance Operations - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
UPCIC [Member]      
Statutory Accounting Practices [Line Items]      
Ordinary dividend capacity accordance with Florida Insurance Code     $ 12,100,000
Dividend paid to immediate parent company $ 0 $ 0  
Statutory capital contribution 44,000,000.0 44,000,000.0 $ 30,000,000
APPCIC [Member]      
Statutory Accounting Practices [Line Items]      
Dividend paid to immediate parent company 0 $ 0  
UPCIC and APPCIC [Member]      
Statutory Accounting Practices [Line Items]      
Minimum capitalization rate   10.00%  
Minimum capital required   greater of ten percent of the insurer’s total liabilities or $10.0 million  
UPCIC and APPCIC [Member] | Minimum [Member]      
Statutory Accounting Practices [Line Items]      
Minimum capitalization amount $ 10,000,000.0 $ 10,000,000.0