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Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Thousands | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 27, 2015 | Jun. 30, 2015 | May. 04, 2015
Common Shares |  |  |
Subsequent Event [Line Items] |  |  |
Common shares repurchased during period, Number of shares |  | 83 |
Common shares repurchased during period, Aggregate amount |  | $ 8,400,000 |
Common shares repurchased during period, Average cost per share |  | $ 101.99 |
Common Shares | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Common shares repurchased during period, Number of shares | 67 |  |
Common shares repurchased during period, Aggregate amount | $ 6,900,000 |  |
Common shares repurchased during period, Average cost per share | $ 102.70 |  |
DaVinciRe Holdings Ltd. |  |  |
Subsequent Event [Line Items] |  |  |
Related party debt to be repaid |  |  | $ 100,000,000
DaVinciRe Holdings Ltd. | 4.750% Senior Notes Due May 1, 2025 |  |  |
Subsequent Event [Line Items] |  |  |
Debt Instrument, face amount |  |  | $ 150,000,000
Senior notes interest rate |  |  | 4.75%

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