Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Income Tax Expense Computed by Applying our Bermuda Statutory Rate and Reported Income Tax Expense (Details)

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Income Taxes - Reconciliation of Income Tax Expense Computed by Applying our Bermuda Statutory Rate and Reported Income Tax Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Tax at Bermuda statutory rate $ 0 $ 0 $ 0
Foreign income taxes at different rates (18,630) (17,540) (28,188)
Tax contingencies (206) (5) 11,184
Return to provision adjustments 2,014 2,961 (1,397)
Benefit (expense) from change in tax rate (14) 117 7,659
Valuation allowance 35,699    
Tax benefit connection with the reversal of substantially all of valuation allowance on net operating loss carryforwards 35,700    
Income tax benefit (expense) $ 18,863 $ (14,467) $ (10,742)