Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income (loss)	$ 10,169	$ (17,956)	$ 5,131	$ (24,723)
Other comprehensive income (loss), net of tax, where applicable: [Abstract]
Unrealized foreign currency translation gains (losses)	0	1	2	16
Realized (gains) losses for foreign currency translation on business disposal reclassified into Other income (expense), net	0	0	559	252
Net other comprehensive income (loss) related to foreign currency translation	0	1	561	268
Unrealized gains (losses) on derivatives for the period	(620)	19,072	15,384	22,467
Derivative (gains) losses reclassified into Net sales	(7,876)	(1,543)	(38,683)	504
Derivative (gains) losses reclassified into Cost of sales	3,760	822	16,000	586
Net other comprehensive income (loss) related to derivatives	(4,736)	18,351	(7,299)	23,557
Actuarial gains (losses) for the period, net of $0, $0, $120 and $259, respectively, of income tax benefit	(1)	0	3,266	(905)
Amortization included in pension cost	282	297	881	893
Net other comprehensive income (loss) related to defined benefit pension and severance plans	281	297	4,147	(12)
Other comprehensive income (loss), net of tax	(4,455)	18,649	(2,591)	23,813
Comprehensive income (loss)	$ 5,714	$ 693	$ 2,540	$ (910)