Schedule of Hierarchy Categorized on Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Cash | [1] | $ 84,441 | $ 83,253 |
Total assets | | 84,441 | 83,253 |
Term loan agreements, fair value | | 434,103 | 444,740 |
Term Loan Agreement Due 2024 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 20,994 | 21,633 |
Alaska Tankers Term Loan Agreement Due 2025 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 27,792 | 30,236 |
OSG 204 LLC Term Loan Agreement Due 2025 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 25,628 | 26,231 |
OSG 205 LLC and OSG Courageous II LLC Term Loan, Due 2027 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 45,377 | 46,380 |
Term Loan Agreement Due 2028 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 313,922 | 319,870 |
Unsecured Senior Notes [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 390 | 390 |
Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Cash | [1] | 84,441 | 83,253 |
Total assets | | 84,441 | 83,253 |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 1 [Member] | Term Loan Agreements Due 2024 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 1 [Member] | Alaska Tankers Term Loan Agreement Due 2025 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 1 [Member] | OSG 204 LLC Term Loan Agreement Due 2025 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 1 [Member] | OSG 205 LLC and OSG Courageous II LLC Term Loan, Due 2027 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 1 [Member] | Term Loan Agreement Due 2028 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 1 [Member] | Unsecured Senior Notes [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | | |
Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Cash | [1] | | |
Total assets | | | |
Term loan agreements, fair value | | 428,373 | 445,081 |
Fair Value, Inputs, Level 2 [Member] | Term Loan Agreement Due 2024 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 20,006 | 21,229 |
Fair Value, Inputs, Level 2 [Member] | Alaska Tankers Term Loan Agreement Due 2025 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 25,566 | 28,695 |
Fair Value, Inputs, Level 2 [Member] | OSG 204 LLC Term Loan Agreement Due 2025 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 24,289 | 25,265 |
Fair Value, Inputs, Level 2 [Member] | OSG 205 LLC and OSG Courageous II LLC Term Loan, Due 2027 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 42,574 | 47,863 |
Fair Value, Inputs, Level 2 [Member] | Term Loan Agreement Due 2028 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | 315,550 | 321,630 |
Fair Value, Inputs, Level 2 [Member] | Unsecured Senior Notes [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | |
Term loan agreements, fair value | | $ 388 | $ 399 |
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[1]Includes current and non-current restricted cash aggregating $ 67 81 | |