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 Benefit (Expense) (Details)

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Income Taxes - Reconciliation of Income Tax Expense Computed by Applying our Bermuda Statutory Rate and Reported Income Tax Benefit (Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Tax at Bermuda statutory rate $ 0 $ 0 $ 0
Foreign income taxes at different rates 24,479 (18,630) (17,540)
Tax contingencies (626) (206) (5)
Return to provision adjustments 1,684 2,014 2,961
Benefit (expense) from change in tax rate   (14) 117
Valuation allowance (38,004) 35,699  
Income tax benefit (expense) $ (12,467) $ 18,863 $ (14,467)