Segment Reporting - Information by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Net Sales	$ 233,229		$ 253,713	$ 273,410	$ 292,714	$ 274,021		$ 304,039	$ 329,392	$ 362,916	$ 1,053,066		$ 1,270,368		$ 1,132,366
Operating (loss) income											(15,672)		39,796		5,861
Total Assets	679,822					788,806					679,822		788,806		822,323
Property, Plant and Equipment, Additions											11,604		11,650		12,867
Depreciation and amortization expense											26,188		25,867		20,472
Metals Segment
Segment Reporting Information [Line Items]
Net Sales											918,298	[1]	1,143,884	[1]	1,014,130	[1]
Operating (loss) income											(11,571)	[1]	48,473	[1]	14,191	[1]
Total Assets	580,570	[1]				693,803	[1]				580,570	[1]	693,803	[1]	729,692	[1]
Property, Plant and Equipment, Additions											10,181	[1]	9,819	[1]	10,639	[1]
Depreciation and amortization expense											24,579	[1]	24,480	[1]	19,329	[1]
Plastics Segment
Segment Reporting Information [Line Items]
Net Sales											134,768		126,484		118,236
Operating (loss) income											4,278		3,188		2,860
Total Assets	57,373					56,149					57,373		56,149		56,171
Property, Plant and Equipment, Additions											1,423		1,831		2,228
Depreciation and amortization expense											1,609		1,387		1,143
Other
Segment Reporting Information [Line Items]
Net Sales											0	[2]	0	[2]	0	[2]
Operating (loss) income											(8,379)	[2]	(11,865)	[2]	(11,190)	[2]
Total Assets	41,879	[2]				38,854	[2]				41,879	[2]	38,854	[2]	36,460	[2]
Property, Plant and Equipment, Additions											0	[2]	0	[2]	0	[2]
Depreciation and amortization expense											$ 0	[2]	$ 0	[2]	$ 0	[2]

[1] The results of Tube Supply, acquired on December 15, 2011, are included in the Company's Metals segment.

[2] “Other” – Operating loss includes the costs of executive, legal and finance departments, which are shared by both the Metals and Plastics segments. The “Other” category’s total assets consist of the Company’s investment in joint venture.