COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended
Mar. 31, 2014 item	Mar. 31, 2013
Legal Matters
Number of pending proceedings	0
Capital leases
Amortization expense related to the capital leases	$ 100,000	$ 0
Capital Lease Obligations Incurred	307,000	0
Operating Leases
Expenses associated with operating leases	300,000	500,000
Equipment related to capital projects
Purchase commitments
Commitments	52,300,000
Other Capital Projects [Member]
Purchase commitments
Commitments	$ 0

The increase during the period in capital lease obligations due to entering into new capital leases.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

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- Definition

The charge for the use of long-lived depreciable capital leased assets for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 3

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-Name Accounting Standards Codification

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

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