Consolidated Statements of Cash Flows (Parenthetical) $ in Thousands	12 Months Ended
Dec. 31, 2015 USD ($)
Cash of Tankers Investments Ltd. upon acquisition, net of transaction costs (note 4a)	$ 0
SPT
Cash of Tankers Investments Ltd. upon acquisition, net of transaction costs (note 4a)	$ 377

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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