v3.3.1.900

Taxation - Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | $ 126,322 | $ 103,697 | $ 104,719
Income tax expense |  |  |  |  |  |  |  |  | 2,038 | 2,164 | 1,863
Net income | $ 30,724 | $ 28,515 | $ 26,511 | $ 38,534 | $ 33,631 | $ 33,926 | $ 31,915 | $ 2,061 | $ 124,284 | $ 101,533 | $ 102,856
Reconciliation of effective tax rate (% of income before income taxes) |  |  |  |  |  |  |  |  |  |  |
Bermuda tax rate |  |  |  |  |  |  |  |  | 0.00% | 0.00% | 0.00%
U.S. taxes at statutory rates |  |  |  |  |  |  |  |  | (2.20%) | (7.30%) | (8.70%)
Valuation allowance in respect of U.S. taxes |  |  |  |  |  |  |  |  | 3.20% | 8.50% | 9.80%
Other jurisdictions |  |  |  |  |  |  |  |  | 0.60% | 0.90% | 0.70%
Actual tax rate |  |  |  |  |  |  |  |  | 1.60% | 2.10% | 1.80%

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