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Other expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other Income and Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |
Investment expense (income) on deposit liabilities |  |  |  |  |  |  |  |  | $ 5,879 | $ (1,273) | $ 2,800
Investment expense and change in fair value of embedded derivatives in reinsurance contracts |  |  |  |  |  |  |  |  | 10,740 | 10,883 | 9,874
Other expenses | $ 3,625 | $ 5,058 | $ 3,811 | $ 4,125 | $ 2,994 | $ (1,362) | $ 3,983 | $ 3,995 | $ 16,619 | $ 9,610 | $ 12,674

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- Definition Deposit Liabilities Investment Expense (income) + References No definition available. + Details
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- Definition Reinsurance Contracts Investment Expense + References No definition available. + Details
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Namespace Prefix: | tpre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Definition The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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