SUPPLEMENTAL GUARANTOR INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Supplemental Condensed Consolidating Statement of Comprehensive Income
Net sales	$ 859,929	$ 787,936
Operating costs and expenses:
Cost of sales	756,395	712,228
Selling, general and administrative expenses	47,728	38,485
(Gain) on sale of assets, restructuring expense and other, net	(12,449)	582
Total operating costs and expenses	791,674	751,295
Operating income	68,255	36,641
Other (expense) income:
Interest (expense) income, net	(14,394)	(16,469)
Foreign exchange (gain) loss	(146)	(600)
Income before income taxes	53,715	19,572
(Benefit) provision for income taxes	18,402	7,444
Net income	35,313	12,128
Comprehensive income	38,259	17,103
Parent Company
Operating costs and expenses:
Selling, general and administrative expenses	7,823	8,616
(Gain) on sale of assets, restructuring expense and other, net	4,913
Total operating costs and expenses	12,736	8,616
Operating income	(12,736)	(8,616)
Other (expense) income:
Interest (expense) income, net	(21,502)	(19,165)
Foreign exchange (gain) loss	219	54
Equity in income (loss) of subsidiaries	57,677	29,310
Income before income taxes	23,658	1,583
(Benefit) provision for income taxes	(11,655)	(10,545)
Net income	35,313	12,128
Comprehensive income	38,259	17,103
Guarantor Subsidiaries
Supplemental Condensed Consolidating Statement of Comprehensive Income
Net sales	781,683	706,845
Operating costs and expenses:
Cost of sales	692,783	642,156
Selling, general and administrative expenses	23,193	16,606
(Gain) on sale of assets, restructuring expense and other, net	(17,454)
Total operating costs and expenses	698,522	658,762
Operating income	83,161	48,083
Other (expense) income:
Interest (expense) income, net	12,995	8,480
Foreign exchange (gain) loss	(14)	12
Equity in income (loss) of subsidiaries	(827)	(2,949)
Income before income taxes	95,315	53,626
(Benefit) provision for income taxes	30,138	17,710
Net income	65,177	35,916
Comprehensive income	64,399	35,743
Non-Guarantor Subsidiaries
Supplemental Condensed Consolidating Statement of Comprehensive Income
Net sales	126,879	128,748
Operating costs and expenses:
Cost of sales	112,245	117,729
Selling, general and administrative expenses	16,712	13,263
(Gain) on sale of assets, restructuring expense and other, net	92	582
Total operating costs and expenses	129,049	131,574
Operating income	(2,170)	(2,826)
Other (expense) income:
Interest (expense) income, net	(5,887)	(5,784)
Foreign exchange (gain) loss	(351)	(666)
Income before income taxes	(8,408)	(9,276)
(Benefit) provision for income taxes	(81)	279
Net income	(8,327)	(9,555)
Comprehensive income	(10,575)	(12,166)
Eliminations
Supplemental Condensed Consolidating Statement of Comprehensive Income
Net sales	(48,633)	(47,657)
Operating costs and expenses:
Cost of sales	(48,633)	(47,657)
Total operating costs and expenses	(48,633)	(47,657)
Other (expense) income:
Equity in income (loss) of subsidiaries	(56,850)	(26,361)
Income before income taxes	(56,850)	(26,361)
Net income	(56,850)	(26,361)
Comprehensive income	$ (53,824)	$ (23,577)