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FINANCIAL INSTRUMENTS AND FAIR VALUE - Roll Forward Of Notional Value (Details) (Interest Rate Swap, USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Interest Rate Swap
       
Derivative [Line Items]        
Balance, beginning of the period $ 6,833 $ 10,166 $ 7,667 $ 11,000
New contracts            
Matured contracts (6,833) (833) (7,667) (1,667)
Balance, end of the period    $ 9,333    $ 9,333