XML 55 R34.htm IDEA: XBRL DOCUMENT
v3.20.1

INTEREST EXPENSES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
INTEREST EXPENSES [Abstract] |
Interest Expense on Long-term Debt | Interest expenses consist of interest expense on the long-term debt, the commitment fee and amortization of deferred financing costs related to the Credit Facility described in Note 9.
All amounts in USD ‘000 |  | 2019 |  |  | 2018 |  |  | 2017 |
Interest Expenses, net of capitalized interest |  |  | 34,018 |  |  |  | 29,753 |  |  |  | 18,286 |
Commitment Fee |  |  | - |  |  |  | 3,325 |  |  |  | 760 |
Amortization of Deferred Financing Costs |  |  | 4,372 |  |  |  | 1,470 |  |  |  | 1,393 |
Other financial costs |  |  | - |  |  |  | 1 |  |  |  | 25 |
Total Interest Expenses |  |  | 38,390 |  |  |  | 34,549 |  |  |  | 20,464 |

X
- Definition Tabular disclosure of interest expense. + References No definition available. + Details
Name: | nat_InterestExpenseOnLongTermDebtTableTextBlock
Namespace Prefix: | nat_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InterestExpenseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration