FINANCIAL INSTRUMENTS AND FAIR VALUE - Roll forward of notional value (Details) (Interest rate swaps, Not designated as hedging instrument, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest rate swaps | Not designated as hedging instrument
Notional Amount Of Interest Rate Derivatives [Roll Forward]
Balance, beginning of the period		$ 6,833		$ 7,667
New contracts
Matured contracts		(6,833)		(7,667)
Balance, end of the period