Segment Information - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013 segments	Sep. 28, 2012
Segment Reporting Information [Line Items]
Third party, net sales	$ 227,835	$ 219,173	$ 630,241	$ 641,648
Income (loss) from operations	8,687	6,610	11,139	14,389
Depreciation and amortization	8,514	8,624	25,557	25,938
Capital expenditures	(2,397)	(1,939)	(7,355)	(4,586)
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	87,706	77,660	226,725	215,439
Income (loss) from operations	9,281	7,475	18,857	18,261
Depreciation and amortization	2,891	2,926	8,721	8,665
Capital expenditures	(873)	(345)	(2,076)	(1,085)
U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	80,775	79,367	209,573	222,429
Income (loss) from operations	2,251	1,707	(1,830)	165
Depreciation and amortization	2,628	2,686	7,866	8,089
Capital expenditures	(361)	(329)	(1,367)	(724)
European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	45,747	48,716	145,430	152,453
Income (loss) from operations	1,782	2,095	7,422	7,979
Depreciation and amortization	2,435	2,299	7,149	7,054
Capital expenditures	(717)	(493)	(2,527)	(1,243)
European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	13,940	13,830	49,583	52,704
Income (loss) from operations	(1,612)	(1,461)	(5,144)	(2,304)
Depreciation and amortization	401	615	1,397	1,868
Capital expenditures	(180)	(89)	(396)	(541)
Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Income (loss) from operations	(3,015)	(3,206)	(8,166)	(9,712)
Depreciation and amortization	159	98	424	262
Capital expenditures	(266)	(683)	(989)	(993)
Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	(333)	(400)	(1,070)	(1,377)
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	227,835	219,173	630,241	641,648
Operating Segments [Member] | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	87,518	77,469	226,203	214,665
Operating Segments [Member] | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	80,717	79,334	209,217	222,267
Operating Segments [Member] | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	45,660	48,540	145,238	152,012
Operating Segments [Member] | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	13,940	13,830	49,583	52,704
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	188	191	522	774
Segment Reconciling Items [Member] | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	58	33	356	162
Segment Reconciling Items [Member] | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	87	176	192	441
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	$ (333)	$ (400)	$ (1,070)	$ (1,377)