Nature of Operations and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company has prepared the accompanying unaudited Condensed Consolidated Financial Statements (“Financial Statements”) in accordance with the rules and regulations of the United States Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, the Financial Statements do not include all of the information and footnotes required by United States Generally Accepted Accounting Principles (“U. S. GAAP”) for annual financial statements. Therefore, the Financial Statements should be read in conjunction with the audited Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed with the SEC on February 23, 2018. The condensed consolidated balance sheet at December 31, 2017, was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. In the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation have been included in the Financial Statements. The results for interim periods do not necessarily indicate the results that may be expected for any other interim period or for the full year. To conform to the current period presentation, certain amounts in the prior periods’ consolidated financial statements and notes have been reclassified. Such reclassifications were of an immaterial amount and had no effect on net income or stockholders’ equity. The Financial Statements include the accounts of UVE and its wholly-owned subsidiaries. All material intercompany balances and transactions have been eliminated in consolidation. Management must make estimates and assumptions that affect amounts reported in the Company’s Financial Statements and in disclosures of contingent assets and liabilities. Actual results could differ from those estimates.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In January 2016, the FASB revised U.S. GAAP with the issuance of ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities to improve the recognition and measurement of financial instruments. The new ASU requires certain investments in equity securities to be measured at fair value with changes in fair value reported in earnings and requires changes in instrument-specific credit risk for financial liabilities recorded at fair value under the fair value option to be reported in OCI. The Company adopted this ASU effective January 1, 2018 using the modified retrospective transition method and recorded a cumulative effect adjustment of $3.6 million to the Condensed Consolidated Balance Sheets to reclassify unrealized losses on investments in equity securities to retained earnings from other comprehensive income. The adoption of this ASU also resulted in the recognition of change in unrealized gains and losses for equity security investments as a separate component in the Condensed Consolidated Statements of Income during the three months ended March 31, 2018. In August 2016, the FASB revised U.S. GAAP with the issuance of ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments intended to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The new ASU applies to: 1) debt prepayment or debt extinguishment costs, 2) settlement of zero-coupon debt instruments, 3) contingent consideration payments made after business combination, 4) proceeds from the settlement of insurance claims, 5) proceeds from the settlement of corporate-owned life insurance policies, 6) distributions received from equity method investments, 7) beneficial interests in securitization transactions, and 8) separately identifiable cash flows and application of the predominance principle. Historically, the items outlined above have not been applicable to the Company. The Company adopted this ASU effective January 1, 2018 and the adoption did not have an impact on our Condensed Consolidated Statements of Cash Flows. In November 2016, the FASB revised U.S. GAAP, Statement of Cash Flows (Topic 230): Restricted Cash with the issuance of the ASU 2016-18, to reduce diversity in the classification and presentation of changes in restricted cash in the statement of cash flows. The new ASU requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Company is required to reconcile such total to amounts on the Condensed Consolidated Balance Sheets and disclose the nature of the restrictions. The Company adopted this ASU effective January 1, 2018, which only resulted in a change in the presentation of the Condensed Consolidated Statements of Cash Flows. In February 2018, the Financial Accounting Standards Board (“FASB”) revised U.S. GAAP, Comprehensive Income (Topic 220), with the issuance of Accounting Standards Update (“ASU”) 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income in response to the enactment of the Tax Cuts and Jobs Act of 2017 (the “Tax Act”) on December 22, 2017. The new ASU permits a company to reclassify the disproportionate income tax effects of the Tax Act on items within accumulated other comprehensive income (“AOCI”) to retained earnings and requires certain new disclosures. The Company adopted this guidance effective January 1, 2018 and made an election to reclassify the income tax effects of the 2017 Act from AOCI to retained earnings. The reclassification of approximately $0.6 million reduced retained earnings. The reclassification represents the effect of the change in the U.S. federal corporate income tax rate on the gross deferred tax amounts and related valuation allowances at the date of enactment of the Tax Act related to items remaining in accumulated other comprehensive income. The Company follows an aggregate portfolio approach and considers that it had two portfolios, an available for sale debt equity portfolio and an available for sale equity portfolio, the disproportionate tax effects relating to the available for sale equity portfolio were included in the transition adjustment when adopting ASU 2016-01.