Segment Information - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013 segments	Jun. 29, 2012
Segment Reporting Information [Line Items]
Third party, net sales	$ 229,861	$ 223,792	$ 402,406	$ 422,475
Income (loss) from operations	9,884	8,065	2,452	7,779
Depreciation and amortization	8,450	8,633	17,043	17,314
Capital expenditures	(2,732)	(1,221)	(4,958)	(2,647)
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Number of reportable segments			4
U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	86,766	76,861	139,019	137,779
Income (loss) from operations	9,799	7,484	9,576	10,786
Depreciation and amortization	2,905	2,872	5,830	5,739
Capital expenditures	(770)	(289)	(1,203)	(740)
U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	74,084	78,817	128,798	143,062
Income (loss) from operations	337	1,511	(4,081)	(1,542)
Depreciation and amortization	2,620	2,690	5,238	5,403
Capital expenditures	(568)	(200)	(1,006)	(395)
European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	51,400	49,431	99,683	103,737
Income (loss) from operations	3,153	3,291	5,640	5,884
Depreciation and amortization	2,380	2,358	4,714	4,755
Capital expenditures	(1,069)	(273)	(1,810)	(750)
European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	18,007	19,140	35,643	38,874
Income (loss) from operations	(904)	(463)	(3,532)	(843)
Depreciation and amortization	412	631	996	1,253
Capital expenditures	(47)	(149)	(216)	(452)
Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Income (loss) from operations	(2,501)	(3,758)	(5,151)	(6,506)
Depreciation and amortization	133	82	265	164
Capital expenditures	(278)	(310)	(723)	(310)
Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	(396)	(457)	(737)	(977)
Income (loss) from operations	0	0	0	0
Depreciation and amortization	0	0	0	0
Capital expenditures	0	0	0	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Third party, net sales	229,861	223,792	402,406	422,475
Operating Segments [Member] | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	86,567	76,550	138,685	137,196
Operating Segments [Member] | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	73,930	78,778	128,500	142,933
Operating Segments [Member] | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	51,357	49,324	99,578	103,472
Operating Segments [Member] | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	18,007	19,140	35,643	38,874
Operating Segments [Member] | Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Operating Segments [Member] | Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items [Member] | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	199	311	334	583
Segment Reconciling Items [Member] | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	154	39	298	129
Segment Reconciling Items [Member] | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	43	107	105	265
Segment Reconciling Items [Member] | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items [Member] | Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items [Member] | Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	$ (396)	$ (457)	$ (737)	$ (977)