Summary of Significant Accounting Policies - Provisions, Segment Reporting, Direct Vessel Expenses, Employee Benefits, Income Taxes and Dividends (Details) |
8 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
|
Aug. 30, 2019
USD ($)
|
Dec. 31, 2022 |
Dec. 31, 2019
USD ($)
|
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
| Provision for loss making voyages in progress | $ 0 | $ 1,604,000 | |||
| Number of Reportable Segments | 3 | 2 | |||
| Termination of indemnities liability | $ 0 | 1,550,000 | |||
| Dividends paid to common stockholders | 0 | 0 | $ 0 | ||
| Dividends paid to preferred stockholders | 0 | 0 | 0 | ||
| Income tax (expense)/benefit | $ (1,475,000) | $ 1,108,000 | $ 3,192,000 | ||
| Annual growth factor management fees every second year | 3.00% | ||||
| Severance and retirement compensation plan | |||||
| Description of defined contribution pension and other postretirement plans | The amount of compensation was based on the number of years of service and the amount of remuneration at the date of dismissal or retirement up to a maximum of two years’ salary. If the employees remained in the employment of the Company until normal retirement age, they were entitled to retirement compensation which was equal to 40% of the compensation amount that would be payable if they were dismissed at that time. The number of employees that would remain with the Company until retirement age was not known. | ||||
| Defined Benefit Plan, Funded Percentage | 40.00% | ||||
| Argentina | |||||
| Effective Income Tax Rate Continuing Operations | 25.00% | 30.00% | 30.00% | 35.00% | |
| Income tax (expense)/benefit | $ (208,000) | $ 2,837,000 | |||
| US Retirement Savings Plan | |||||
| Description of defined contribution pension and other postretirement plans | The Company sponsored a 401(k) retirement savings plan, which was categorized as a defined contribution plan. The plan was available to full time employees who met the plan’s eligibility requirements. The plan permitted employees to make contributions up to 15% of their annual salary with the Company matching up to the first 6%. The Company made monthly contributions (matching contributions) to the plan based on amounts contributed by employees. Subsequent to making the matching contributions, the Company had no further obligations. The Company might make an additional discretionary contribution annually if such a contribution was authorized by the Board of Directors. The plan was administered by an independent professional firm that specialized in providing such services. | ||||
| Minimum | Stock-Based Compensation | |||||
| Vesting Period | 3 years | ||||
| Maximum | Stock-Based Compensation | |||||
| Vesting Period | 4 years | ||||
| Management agreement | NSM | |||||
| Termination date of agreement | Aug. 29, 2024 | ||||
| Management agreement | Owned Vessels | NSM | |||||
| Daily management fee | $ 3,700 | ||||
| Management agreement | After two years | Owned Vessels | NSM | |||||
| Rate of annual increase in management fees | 3.00% | ||||
| Management agreement | Chartered-in vessels | NSM | |||||
| Daily management fee | $ 30 | ||||