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RELATED-PARTY TRANSACTIONS (Details) (USD $)
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12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
|
Dec. 31, 2013
General partner
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Dec. 31, 2012
General partner
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Dec. 31, 2011
General partner
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Dec. 31, 2013
Equipower
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Dec. 31, 2012
Equipower
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Dec. 31, 2011
Equipower
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Dec. 31, 2013
IPS Engineering/EPC
|
Dec. 31, 2013
Sponsors
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Dec. 31, 2012
Sponsors
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Oct. 27, 2011
Notes Payable
Sponsors
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Jul. 31, 2012
Notes Payable
Sponsors
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May 31, 2012
Notes Payable
Sponsors
|
Dec. 31, 2013
Notes Payable
Sponsors
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Jul. 31, 2012
Revolving credit facility
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May 31, 2012
Revolving credit facility
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| RELATED-PARTY TRANSACTIONS | ||||||||||||||||||
| Due to affiliate | $ 653,000 | $ 0 | $ 653,000 | $ 0 | ||||||||||||||
| Due from affiliate | 0 | 774,000 | 0 | 774,000 | ||||||||||||||
| General and administrative expense allocation | 3,914,000 | 1,200,000 | 0 | |||||||||||||||
| Payments for electricity management consulting services | 199,000 | 204,000 | 11,000 | 200,000 | ||||||||||||||
| Notes | 200,000,000.0 | |||||||||||||||||
| Interest rate (as a percent) | 8.00% | |||||||||||||||||
| Additional borrowings | 50,000,000 | 163,000,000 | ||||||||||||||||
| Prepayment of notes | 49,200,000 | 160,000,000 | ||||||||||||||||
| Interest paid in kind | 0 | 5,426,000 | 2,025,000 | 6,300,000 | ||||||||||||||
| Interest expense capitalized related to costs incurred on capital projects under construction | 900,000 | |||||||||||||||||
| Transaction expenses receivable | 1,300,000 | |||||||||||||||||
| Reimbursements received for transaction expenses | 300,000 | |||||||||||||||||
| Write-off of transaction expense receivable | $ 1,000,000 | |||||||||||||||||