XML 35 R26.htm IDEA: XBRL DOCUMENT v3.5.0.2

RELATED PARTY TRANSACTIONS (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Scandic American Shipping Ltd [Member]
Related Party Transaction [Line Items]
Management fee received	$ 100,000		$ 150,000
Nordic American Offshore Limited [Member]
Related Party Transaction [Line Items]
Costs and expenses, related party	$ 800,000	$ 900,000

X

- Definition

Amount of management fee received during the period.

+ References

No definition available.

+ Details

Name:	nat_RelatedPartyTransactionAmountOfManagementFeeReceivedDuringThePeriod
Namespace Prefix:	nat_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Costs of sales and operating expenses for the period incurred from transactions with related parties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_CostsAndExpensesRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=nat_ScandicAmericanShippingLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=nat_NordicAmericanOffshoreLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: