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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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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