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Investments in Affiliates (Details) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |
Share of net earnings/(losses) of affiliates | $ 157 | $ (261) |
Investments in affiliates | 51,292 |  | $ 44,385
Avenir |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Share of net earnings/(losses) of affiliates | 153 | (212) |
Investments in affiliates | $ 46,887 |  | 39,984
Number of shares subscribed (in shares) | 18,000,000 |  |
Equity method, par value (in usd per share) | $ 1.00 |  |
Subscribed shares cost | $ 18,000 |  |
Others |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Share of net earnings/(losses) of affiliates | 4 | $ (49) |
Investments in affiliates | $ 4,405 |  | $ 4,401

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