FINANCIAL INSTRUMENTS, Gain (Loss) by Hedging Relationship (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Effect of derivative instruments on statements of operations [Abstract]
Net gain (loss) recognized in OCI, net of tax (1)	$ 1,086	$ (516)
Net gain reclassified from accumulated OCI into income, net of tax (2)	825	518
Gain on Cash Flow Hedge Ineffectiveness	158	0
Derivative Instruments, Gain (Loss) Recognized in Income, Amount Excluded from Effectiveness Testing, Net	15	25
Net income (loss) recognized in other income and expense (4)	$ 143	$ (148)