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DEBT (Maturities of Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Debt Instruments [Abstract]    
2014 $ 208,994  
2015 506,446  
2016 302,190  
2017 375,564  
2018 12  
Thereafter 1,925,000  
Total maturities of debt 3,318,206  
Unamortized discount (22,088)  
Debt Instrument, fair value basis adjustment attributable to hedged debt 58,055 56,520
Total long-term debt, net of current portion $ 3,354,173 $ 3,370,522