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Subsequent Events - Additional Information (Detail) - USD ($) |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 28, 2016 | Apr. 13, 2016 | Jan. 14, 2016 | Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Subsequent Event [Line Items] |  |  |  |  |  |
Cash dividend declared per common share |  |  | $ 0.14 | $ 0.14 | $ 0.12 |
Common stock, par value |  |  |  | $ 0.01 |  | $ 0.01
Issuance of common stock |  |  |  |  | $ 503,000 |
Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Cash dividend declared per common share |  | $ 0.14 |  |  |  |
Dividends payable date |  | Jul. 05, 2016 |  |  |  |
Dividends payable, shareholders record date |  | Jun. 15, 2016 |  |  |  |
Subsequent Event [Member] | Private Placement [Member] | RenaissanceRe Ventures Ltd [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Number of common stock, shares issued | 583,771 |  |  |  |  |
Common stock, par value | $ 17.13 |  |  |  |  |
Issuance of common stock | $ 10,000,000 |  |  |  |  |
Cash proceeds from private placement | 2,965,000 |  |  |  |  |
Proceeds used to cancellation of outstanding indebtedness | $ 7,035,000 |  |  |  |  |

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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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