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FINANCIAL INSTRUMENTS AND DERIVATIVES (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Realized gain (loss)	$ 11,294	$ (2,136)	$ 3,877
Unrealized gain (loss)	10,945	(4,210)	(3,063)
Net gain (loss) on derivative contracts	$ 22,239	$ (6,346)	$ 814

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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