Segment Information - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2014		Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2013		Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2014 segments		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Third party, net sales	$ 211,909		$ 239,942	$ 232,990	$ 169,904	$ 196,431		$ 227,835	$ 229,861	$ 172,545	$ 854,745		$ 826,672		$ 837,140
Income (loss) from operations	2,293		11,176	10,131	(5,010)	(4,121)		8,687	9,884	(7,432)	18,590		7,018		11,355
Depreciation and amortization	7,833		8,142	8,251	8,202	9,542		8,514	8,450	8,593	32,428		35,099		34,784
Capital expenditures											(7,333)		(10,742)		(7,140)
Total assets	536,776	[1]				571,973	[1]				536,776	[1]	571,973	[1]	594,422	[1]
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											280,799		267,209		259,888
Income (loss) from operations											20,656		16,763		19,319
Depreciation and amortization											10,925		11,820		11,674
Capital expenditures											(1,316)		(2,787)		(1,495)
Total assets	159,436	[1]				163,773	[1]				159,436	[1]	163,773	[1]	173,719	[1]
U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales											317,396		302,411		314,985
Income (loss) from operations											(1,346)		(3,242)		1,771
Depreciation and amortization											10,075		11,333		10,774
Capital expenditures											(1,464)		(2,016)		(1,255)
Total assets	114,321	[1]				107,053	[1]				114,321	[1]	107,053	[1]	115,525	[1]
European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales											193,080		193,721		196,606
Income (loss) from operations											12,555		11,004		9,208
Depreciation and amortization											9,162		9,509		9,455
Capital expenditures											(1,565)		(3,224)		(2,275)
Total assets	200,519	[1]				228,514	[1]				200,519	[1]	228,514	[1]	221,950	[1]
European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales											65,027		64,709		67,650
Income (loss) from operations											(768)		(6,849)		(6,586)
Depreciation and amortization											1,564		1,846		2,480
Capital expenditures											(1,170)		(1,612)		(627)
Total assets	48,904	[1]				52,331	[1]				48,904	[1]	52,331	[1]	55,898	[1]
Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales											0		0		0
Income (loss) from operations											(12,507)		(10,658)		(12,357)
Depreciation and amortization											702		591		401
Capital expenditures											(1,818)		(1,103)		(1,488)
Total assets	13,596	[1]				20,302	[1]				13,596	[1]	20,302	[1]	27,330	[1]
Eliminations
Segment Reporting Information [Line Items]
Third party, net sales											(1,557)		(1,378)		(1,989)
Income (loss) from operations											0		0		0
Depreciation and amortization											0		0		0
Capital expenditures											0		0		0
Total assets	0	[1]				0	[1]				0	[1]	0	[1]	0	[1]
Operating Segments
Segment Reporting Information [Line Items]
Third party, net sales											854,745		826,672		837,140
Operating Segments | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales											279,954		266,483		258,937
Operating Segments | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales											317,270		301,976		314,466
Operating Segments | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales											192,494		193,504		196,087
Operating Segments | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales											65,027		64,709		67,650
Operating Segments | Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales											0		0		0
Operating Segments | Eliminations
Segment Reporting Information [Line Items]
Third party, net sales											0		0		0
Segment Reconciling Items
Segment Reporting Information [Line Items]
Third party, net sales											0		0		0
Segment Reconciling Items | U.S. Residential Products
Segment Reporting Information [Line Items]
Third party, net sales											845		726		951
Segment Reconciling Items | U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales											126		435		519
Segment Reconciling Items | European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales											586		217		519
Segment Reconciling Items | European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales											0		0		0
Segment Reconciling Items | Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales											0		0		0
Segment Reconciling Items | Eliminations
Segment Reporting Information [Line Items]
Third party, net sales											$ (1,557)		$ (1,378)		$ (1,989)

[1] Segment assets include cash, accounts receivable, inventories, other current assets, property, plant and equipment, goodwill, intangibles, and other long term assets. Other non-allocated assets include all corporate assets, as well as deferred taxes and income taxes receivable.