Supplemental Consolidating Financial Information Condensed Statement of Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net sales	$ 761,990	$ 774,252
Cost of sales	685,252	679,151
Selling, general and administrative	59,850	53,777
Depreciation	13,499	13,627
Amortization	2,341	2,342
Income (Loss) from Equity Method Investments	0	0
Restructuring and relocation costs	460	217
Operating income (loss)	588	25,138
Interest income	664	732
Interest expense	(15,468)	(14,564)
Loss on debt extinguishment	(521)	(6,275)
Other income (expense), net	(3,894)	555
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(18,631)	5,586
Income Tax Expense (Benefit)	(5,972)	(3,209)
Income (Loss) from Continuing Operations Attributable to Parent	(24,603)	2,377
Net income (loss)	(24,603)	2,377
Consolidation, Eliminations [Member]
Net sales	(242,586)	(230,509)
Cost of sales	(242,199)	(230,492)
Selling, general and administrative	0	0
Depreciation	0	0
Amortization	0	0
Income (Loss) from Equity Method Investments	3,997	53,563
Restructuring and relocation costs	0	0
Operating income (loss)	(4,384)	(53,580)
Interest income	0	0
Interest expense	0	0
Loss on debt extinguishment	0	0
Other income (expense), net	387	18
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(3,997)	(53,562)
Income Tax Expense (Benefit)	(711)	3,002
Net income (loss)	(4,708)	(50,560)
Parent Company [Member] | Reportable Legal Entities [Member]
Net sales	0	0
Cost of sales	0	96
Selling, general and administrative	13,367	7,952
Depreciation	0	0
Amortization	0	0
Income (Loss) from Equity Method Investments	95	(19,812)
Restructuring and relocation costs	460	0
Operating income (loss)	(13,922)	11,764
Interest income	0	0
Interest expense	(5,292)	(6,372)
Loss on debt extinguishment	0	(843)
Other income (expense), net	583	1,037
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(18,631)	5,586
Income Tax Expense (Benefit)	(5,972)	(3,209)
Net income (loss)	(24,603)	2,377
Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Net sales	209,044	185,042
Cost of sales	202,000	179,813
Selling, general and administrative	3,787	3,707
Depreciation	1,276	1,448
Amortization	0	0
Income (Loss) from Equity Method Investments	(7,565)	(33,719)
Restructuring and relocation costs	0	71
Operating income (loss)	9,546	33,722
Interest income	2	5
Interest expense	(9,231)	(8,157)
Loss on debt extinguishment	(521)	(5,432)
Other income (expense), net	109	(326)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(95)	19,812
Income Tax Expense (Benefit)	(343)	923
Net income (loss)	(438)	20,735
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Net sales	293,273	307,726
Cost of sales	262,872	270,771
Selling, general and administrative	22,172	19,678
Depreciation	6,199	6,699
Amortization	2,335	2,336
Income (Loss) from Equity Method Investments	3,473	(32)
Restructuring and relocation costs	0	149
Operating income (loss)	(3,778)	8,125
Interest income	33	54
Interest expense	(884)	(15)
Loss on debt extinguishment	0	0
Other income (expense), net	(451)	101
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(5,080)	8,265
Income Tax Expense (Benefit)	1,968	(3,274)
Net income (loss)	(3,112)	4,991
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Net sales	502,259	511,993
Cost of sales	462,579	458,963
Selling, general and administrative	20,524	22,440
Depreciation	6,024	5,480
Amortization	6	6
Income (Loss) from Equity Method Investments	0	0
Restructuring and relocation costs	0	(3)
Operating income (loss)	13,126	25,107
Interest income	629	673
Interest expense	(61)	(20)
Loss on debt extinguishment	0	0
Other income (expense), net	(4,522)	(275)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	9,172	25,485
Income Tax Expense (Benefit)	(914)	(651)
Net income (loss)	$ 8,258	$ 24,834