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LIABILITIES AND LONG-TERM DEBT (Details) (USD $)
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0 Months Ended | 6 Months Ended | 6 Months Ended | |||||||
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Jun. 30, 2014
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Dec. 31, 2013
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Jul. 10, 2014
Domestic Bank [Member]
Revolving Loan [Member]
bbl
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Jun. 30, 2014
Domestic Bank [Member]
Revolving Loan [Member]
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Dec. 31, 2013
Domestic Bank [Member]
Revolving Loan [Member]
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May 25, 2006
Domestic Bank [Member]
Revolving Loan [Member]
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Jun. 30, 2014
Term loan [Member]
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Dec. 31, 2013
Term loan [Member]
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Nov. 30, 2008
Term loan [Member]
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Sep. 30, 2007
Term loan [Member]
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| Debt Instrument [Line Items] | ||||||||||
| Face amount | $ 14,000,000 | $ 10,000,000 | ||||||||
| Maturity date | Oct. 31, 2018 | |||||||||
| Short-term amount outstanding | 1,400,000 | 1,400,000 | 1,400,000 | 1,400,000 | ||||||
| Long-term amount outstanding | 8,139,000 | 11,839,000 | 3,500,000 | 6,500,000 | 4,700,000 | 5,400,000 | ||||
| Interest rate on loan (in hundredths) | 2.25% | 2.25% | ||||||||
| Principal payments | 350,000 | |||||||||
| Derivative amount of hedged item | 10,000,000 | |||||||||
| Maximum borrowing capacity | 25,000,000 | 18,000,000 | 12,000,000 | |||||||
| Expiration date | Jun. 30, 2018 | |||||||||
| Credit agreement sub limit available to support hedging program | 3,000,000 | |||||||||
| Interest rate (in hundredths) | 2.25% | 2.25% | ||||||||
| Quarterly commitment fee on the unused portion of loan (in hundredths) | 0.25% | |||||||||
| Available remaining borrowing capacity | $ 14,500,000 | |||||||||
| Total Increase of supply (in barrels) | 6,700 | |||||||||
| Increase of supply per day (in barrels) | 11,000 | |||||||||
| Commercial style amortization period | 15 years |