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RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle    
Deferred financing fees (net of accumulated amortization) $ 5,313 $ 2,498
Debt maturing within one year 451,232 395,105
Long-term debt $ 4,146,892 4,034,352
Reported    
New Accounting Pronouncements or Change in Accounting Principle    
Deferred financing fees (net of accumulated amortization)   29,298
Debt maturing within one year   395,334
Long-term debt   4,060,923
Adjustment    
New Accounting Pronouncements or Change in Accounting Principle    
Deferred financing fees (net of accumulated amortization)   26,800
Debt maturing within one year   229
Long-term debt   $ 26,571