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Income Taxes - Reclassifications of certain capital accounts (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Taxes      
Paid-in capital in excess of par value $ (334) $ (140) $ (1,487)
Net distributable earnings (accumulated losses) $ 334 $ 140 $ 1,487