Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income (loss)	$ (24,603)	$ 2,377
Other comprehensive income (loss), net of tax, where applicable: [Abstract]
Unrealized foreign currency translation gains	16	389
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	(252)	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	268	389
Change in fair value of available-for-sale investment	0	157
Realized gains of available-for-sale investment reclassified into Other income (expense), net	0	(561)
Net other comprehensive loss related to available-for-sale investment	0	(404)
Unrealized gains (losses) on derivatives for the period	(1,046)	9,062
Derivative losses reclassified into Net sales	1,027	8,632
Derivative gains reclassified into Cost of sales	(175)	(2,839)
Net other comprehensive income (loss) related to derivatives	(194)	14,855
Actuarial losses for the period, net of $259 and $145, respectively, of income tax benefit	(342)	(1,421)
Amortization included in pension cost	300	338
Net other comprehensive loss related to defined benefit pension and severance plans	(42)	(1,083)
Other comprehensive income (loss), net of tax	32	13,757
Comprehensive income (loss)	$ (24,571)	$ 16,134