- Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014 segments	Sep. 27, 2013
Segment Reporting Information [Line Items]
Third party, net sales	$ 239,942	$ 227,835	$ 642,836	$ 630,241
Income (loss) from operations	11,176	8,687	16,297	11,139
Depreciation and amortization	8,142	8,514	24,595	25,557
Capital expenditures	2,272	2,397	5,233	7,355
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	94,344	87,706	230,849	226,725
Income (loss) from operations	9,660	9,281	17,938	18,857
Depreciation and amortization	2,790	2,891	8,246	8,721
Capital expenditures	301	873	961	2,076
U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	85,673	80,775	216,799	209,573
Income (loss) from operations	2,213	2,251	(1,003)	(1,830)
Depreciation and amortization	2,707	2,628	7,564	7,866
Capital expenditures	641	361	1,344	1,367
European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	44,886	45,747	146,730	145,430
Income (loss) from operations	1,979	1,782	9,297	7,422
Depreciation and amortization	2,299	2,435	7,010	7,149
Capital expenditures	415	717	1,220	2,527
European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	15,473	13,940	49,644	49,583
Income (loss) from operations	325	(1,612)	(619)	(5,144)
Depreciation and amortization	398	401	1,261	1,397
Capital expenditures	248	180	730	396
Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales	0	0	0	0
Income (loss) from operations	(3,001)	(3,015)	(9,316)	(8,166)
Depreciation and amortization	(52)	159	514	424
Capital expenditures	667	266	978	989
Eliminations
Segment Reporting Information [Line Items]
Third party, net sales	(434)	(333)	(1,186)	(1,070)
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	239,942	227,835	642,836	630,241
Operating Segments | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales	94,126	87,518	230,235	226,203
Operating Segments | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	85,633	80,717	216,699	209,217
Operating Segments | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	44,710	45,660	146,258	145,238
Operating Segments | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales	15,473	13,940	49,644	49,583
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	218	188	614	522
Segment Reconciling Items | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales	40	58	100	356
Segment Reconciling Items | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales	176	87	472	192
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	$ (434)	$ (333)	$ (1,186)	$ (1,070)