Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income (loss)	$ (17,956)	$ (17,814)	$ (24,723)	$ 15,663
Other comprehensive income (loss), net of tax, where applicable: [Abstract]
Unrealized foreign currency translation gains (losses)	1	(753)	16	(381)
Realized gains for foreign currency translation on business disposal reclassified into Other income (expense), net	0	0	252	0
Net other comprehensive income (loss) related to foreign currency translation	1	(753)	268	(381)
Change in fair value of available-for-sale investment	0	0	0	157
Realized gains of available-for-sale investment reclassified into Other income (expense), net	0	0	0	(561)
Net other comprehensive loss related to available-for-sale investment	0	0	0	(404)
Unrealized gains (losses) on derivatives for the period	19,072	(6,183)	22,467	(8,308)
Derivative (gains) losses reclassified into Net sales	(1,543)	6,114	504	21,328
Derivative (gains) losses reclassified into Cost of sales	822	(2,277)	586	(7,267)
Net other comprehensive income (loss) related to derivatives	18,351	(2,346)	23,557	5,753
Actuarial losses for the period, net of $0, $3, $259 and $133, respectively, of income tax benefit	0	(42)	(905)	(1,448)
Amortization included in pension cost	297	342	893	1,018
Net other comprehensive gain (loss) related to defined benefit pension and severance plans	297	300	(12)	(430)
Other comprehensive income (loss), net of tax	18,649	(2,799)	23,813	4,538
Comprehensive income (loss)	$ 693	$ (20,613)	$ (910)	$ 20,201