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FAIR VALUE MEASUREMENTS Table 3 (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Fair Value and Carrying Value of Debt and Note Receivable from Counterparty [Line Items]    
Fair value, debt $ 2,783,666 $ 2,636,734
Carrying amount, debt 2,731,551 2,655,553
Carrying amount, note receivable from related party 0 165,440
Axeon [Member]
   
Fair Value and Carrying Value of Debt and Note Receivable from Counterparty [Line Items]    
Fair value, note receivable 148,300 133,416
Carrying amount, note receivable from Axeon 170,385  
Carrying amount, note receivable from related party   $ 165,440