- Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014 segments	Jun. 28, 2013
Segment Reporting Information [Line Items]
Third party, net sales	$ 232,990	$ 229,861	$ 402,894	$ 402,406
Income (loss) from operations	10,131	9,884	5,121	2,452
Depreciation and amortization	8,251	8,450	16,453	17,043
Capital expenditures	(1,473)	(2,732)	(2,961)	(4,958)
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	86,926	86,766	136,505	139,019
Income (loss) from operations	9,595	9,799	8,278	9,576
Depreciation and amortization	2,723	2,905	5,456	5,830
Capital expenditures	(321)	(770)	(660)	(1,203)
U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	77,099	74,084	131,126	128,798
Income (loss) from operations	1,781	337	(3,216)	(4,081)
Depreciation and amortization	2,315	2,620	4,857	5,238
Capital expenditures	(148)	(568)	(703)	(1,006)
European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	51,707	51,400	101,844	99,683
Income (loss) from operations	3,389	3,153	7,318	5,640
Depreciation and amortization	2,358	2,380	4,711	4,714
Capital expenditures	(465)	(1,069)	(805)	(1,810)
European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	17,594	18,007	34,171	35,643
Income (loss) from operations	(598)	(904)	(944)	(3,532)
Depreciation and amortization	446	412	863	996
Capital expenditures	(319)	(47)	(482)	(216)
Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Income (loss) from operations	(4,036)	(2,501)	(6,315)	(5,151)
Depreciation and amortization	409	133	566	265
Capital expenditures	(220)	(278)	(311)	(723)
Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	(336)	(396)	(752)	(737)
Income (loss) from operations	0	0	0	0
Depreciation and amortization	0	0	0	0
Capital expenditures	0	0	0	0
Operating Segments
Segment Reporting Information [Line Items]
Third party, net sales	232,990	229,861	402,894	402,406
Operating Segments | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	86,709	86,567	136,109	138,685
Operating Segments | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	77,067	73,930	131,066	128,500
Operating Segments | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	51,620	51,357	101,548	99,578
Operating Segments | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	17,594	18,007	34,171	35,643
Operating Segments | Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Operating Segments | Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	217	199	396	334
Segment Reconciling Items | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	32	154	60	298
Segment Reconciling Items | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	87	43	296	105
Segment Reconciling Items | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items | Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Segment Reconciling Items | Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	$ (336)	$ (396)	$ (752)	$ (737)