Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended |
|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2020 |
Dec. 31, 2019 |
|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | |||
| Impairment loss | $ 472 | ||
| Two vessels | |||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | |||
| Impairment loss | $ 8,967 | ||
| Three vessels | |||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | |||
| Impairment loss | $ 92,013 | ||
| Chartered-in vessels | |||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | |||
| Impairment loss | $ 38,636 |