Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Three vessels | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Impairment loss | $ 59,108 | $ 92,013 |
| Chartered-in vessels | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Impairment loss | $ 1,361 | $ 38,636 |