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Insurance Operations - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  | 3 Months Ended | 9 Months Ended
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Mar. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2011 | Oct. 04, 2013 Subsequent Event [Member] | Oct. 03, 2013 Subsequent Event [Member] Extraordinary Dividend [Member] Florida Office of Insurance Regulation [Member] | Mar. 31, 2012 Previous Accounting Guidance [Member] | Mar. 31, 2012 Adjustments for New Accounting Pronouncement [Member] | Sep. 30, 2013 American Platinum Property and Casualty Insurance Company [Member] State | Sep. 30, 2013 Universal Property and Casualty Insurance Company [Member] State | Sep. 30, 2013 UPCIC and APPCIC [Member] | Sep. 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 |  |  |  |  |  | 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
Administrative Fine |  |  |  | $ 1,300,000 | $ 1,300,000 |  |  |  |  |  |

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