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RELATED PARTY TRANSACTIONS (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Jan. 10, 2013 | Dec. 15, 2012
Related Party Transaction [Line Items] |  |  |  |  |
Total costs for services recognized under the Management Agreement | 3,930,000 | $ 3,821,000 | $ 3,686,000 |  |
Noncash share-based compensation expense recognized | 1,541,000 | 67,000 | 2,838,000 |  |
Share component price (in dollars per share) |  |  |  |  | $ 8.52
Share price as of the transaction date (in dollars per share) |  |  |  | $ 9.50 |
Share-based compensation arrangement shares cliff vesting period, first range (in years) |  | 4 years |  |  |
Number of restricted shares for which requirements have been lifted |  |  |  | 174,000 |
Costs and expenses, related party | 3,930,000 | 3,821,000 | 3,686,000 |  |
Number of tankers withdrawn from pool | 9 |  |  |  |
Scandic American Shipping Ltd [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Manager's right to ownership of company's total outstanding shares (in hundredths) | 2.00% |  |  |  |
New amount of management fee due to decrease/increase in the period | 150,000 | 500,000 |  |  |
Previous amount of management fee before decrease/increase in the period | 500,000 | 350,000 |  |  |
Accounts payable | 1,500,000 | 900,000 |  |  |
Underwritten public offering of common shares | 5,500,000 |  |  |  |
Restricted shares issued to the Manager (in shares) | 112,245 | 4,612 |  |  |
Fair value of shares issued to manager (in dollars per share) | 13.73 | $ 14.45 |  |  |
Number of follow-on offerings | 9 |  |  |  |
Restricted shares issued in connection to follow-on offerings (in shares) | 1,054,833 |  |  |  |
Agreement to acquire shares |  |  |  |  | 100.00%
Purchase price |  |  |  |  | 25,000,000
Purchase price paid in shares |  |  |  |  | 17,000,000
Purchase price paid in cash |  |  |  |  | 8,000,000
Share component price (in dollars per share) |  |  |  | $ 8.90 |
Restricted shares authorized (in shares) |  | 400,000 |  |  |
Restricted shares issued to the Manager (in shares) |  | 174,000 |  |  |
Share-based compensation arrangement shares authorized and issued, first range (in shares) |  | 100,000 |  |  |
Share-based compensation arrangement shares cliff vesting period, second range (in years) |  | 5 years |  |  |
Share-based compensation arrangement shares authorized and issued, second range (in shares) |  | 74,000 |  |  |
Ownership of company by Manager and Owners (in hundredths) | 2.17% |  |  |  |
Management Agreement remaining term (in years) | 10 years |  |  |  |
Continuous length of the Management Agreement unless terminated (in years) | 10 years |  |  |  |
Director [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Total costs for services recognized under the Management Agreement | 100,000 | 100,000 | 100,000 |  |
Accounts payable | 0 | 0 |  |  |
Costs and expenses, related party | 100,000 | 100,000 | 100,000 |  |
Advisor to the Chairman [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Total costs for services recognized under the Management Agreement | 100,000 | 100,000 | 100,000 |  |
Accounts payable | 0 | 0 |  |  |
Costs and expenses, related party | 100,000 | 100,000 | 100,000 |  |
Orion Tankers Pool [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party receivable | 37,000,000 | 18,900,000 |  |  |
Initial funding per vessel | 200,000 | 200,000 |  |  |
Number of months working capital is to be repaid (in months) | 6 |  |  |  |
Accounts receivable, net related party | 12,900,000 | $ 1,600,000 |  |  |

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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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- Definition Aggregate value of stock related to Restricted Stock Awards issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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