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Variable Interest Entities and Noncontrolling Interests - Non-redeemable noncontrolling interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Noncontrolling Interest [Line Items] |  |  |  |  |
Non-redeemable noncontrolling interests, beginning of period |  |  |  | $ 762,777 |
Amounts attributable to noncontrolling interests |  | $ 165,598 | $ 12,301 | (68,346) | $ 54,683
Other comprehensive (income) loss attributable to noncontrolling interests |  | 20,111 | 2,891 | (12,947) | 7,030
Non-redeemable noncontrolling interests, end of period |  | 679,089 | 855,347 | 679,089 | 855,347
Watford Holdings Ltd |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Non-redeemable noncontrolling interests, beginning of period |  | 492,785 | 838,081 | 762,777 | 791,560
Additional paid in capital attributable to noncontrolling interests |  | 595 | 2,074 | 472 | 2,074
Repurchases attributable to non-redeemable noncontrolling interests | [1] |  |  | (2,867) | 0
Amounts attributable to noncontrolling interests |  | 165,598 | 12,301 | (68,346) | 54,683
Other comprehensive (income) loss attributable to noncontrolling interests |  | 20,111 | 2,891 | (12,947) | 7,030
Non-redeemable noncontrolling interests, end of period |  | $ 679,089 | $ 855,347 | $ 679,089 | $ 855,347
Noncontrolling shareholders | Common shares | Watford Holdings Ltd |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Noncontrolling interest, ownership percentage by noncontrolling owners |  | 87.00% |  | 87.00% |
[1] | During 2020, Watford’s board of directors authorized the investment in Watford’s common shares through a share repurchase program.

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