Segment Information - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										9 Months Ended	12 Months Ended
	Dec. 31, 2012		Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011		Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Sep. 28, 2012 segments	Dec. 31, 2012		Dec. 30, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Third party, net sales	$ 195,492		$ 219,173	$ 223,792	$ 198,683	$ 219,661		$ 246,780	$ 256,858	$ 210,379		$ 837,140		$ 933,678		$ 883,700
Intersegment, net sales												0		0		0
Total net sales												837,140		933,678		883,700
Income (loss) from operations	(3,034)		6,610	8,065	(286)	(2,863)		3,776	8,569	812		11,355		10,294		18,968
Depreciation and amortization	8,846		8,624	8,633	8,681	9,130		9,318	9,509	9,237		34,784		37,194		38,700
Capital expenditures												7,140		10,151		12,165
Total assets	594,422	[1]				619,246	[1]					594,422	[1]	619,246	[1]	666,890	[1]
Multiemployer pension withdrawal expense												39		1,200		0
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												281,099		305,366		300,262
Intersegment, net sales												951		1,177		1,342
Total net sales												282,050		306,543		301,604
Income (loss) from operations												22,489		18,226		24,701	[2]
Depreciation and amortization												11,674		11,994		12,285
Capital expenditures												1,495		996		2,639
Total assets	173,719	[1]				174,835	[1]					173,719	[1]	174,835	[1]	190,699	[1]
Multiemployer pension withdrawal expense														1,200
U.S. Commercial Products
Segment Reporting Information [Line Items]
Third party, net sales												292,304		301,286		293,679
Intersegment, net sales												519		284		1,117
Total net sales												292,823		301,570		294,796
Income (loss) from operations												(1,399)		(3,901)		(7,569)
Depreciation and amortization												10,774		11,004		11,610
Capital expenditures												1,255		3,558		2,660
Total assets	115,525	[1]				117,709	[1]					115,525	[1]	117,709	[1]	112,257	[1]
European Roll Coated Aluminum
Segment Reporting Information [Line Items]
Third party, net sales												196,087		243,497		210,534
Intersegment, net sales												519		553		1,030
Total net sales												196,606		244,050		211,564
Income (loss) from operations												9,208		13,619		17,331
Depreciation and amortization												9,455		10,790		10,848
Capital expenditures												2,275		2,144		2,126
Total assets	221,950	[1]				234,513	[1]					221,950	[1]	234,513	[1]	257,550	[1]
European Engineered Products
Segment Reporting Information [Line Items]
Third party, net sales												67,650		83,529		79,225
Intersegment, net sales												0		0		0
Total net sales												67,650		83,529		79,225
Income (loss) from operations												(6,586)		(2,055)		310
Depreciation and amortization												2,480		3,086		2,941
Capital expenditures												627		1,629		2,585
Total assets	55,898	[1]				63,579	[1]					55,898	[1]	63,579	[1]	67,355	[1]
Other Non-Allocated
Segment Reporting Information [Line Items]
Third party, net sales												0		0		0
Intersegment, net sales												0		0		0
Total net sales												0		0		0
Income (loss) from operations												(12,357)		(15,595)		(15,805)
Depreciation and amortization												401		320		1,016
Capital expenditures												1,488		1,824		2,155
Total assets	27,330	[1]				28,610	[1]					27,330	[1]	28,610	[1]	39,029	[1]
Eliminations
Segment Reporting Information [Line Items]
Third party, net sales												0		0		0
Intersegment, net sales												(1,989)		(2,014)		(3,489)
Total net sales												(1,989)		(2,014)		(3,489)
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]
UNITED STATES
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Number of legal entities into which US operating companies are organized											1
Number of reportable segments											2

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

[2] Income from operations in our U.S. Residential Products Segment for the year ended December 30, 2011 included a $1.2 million charge for the early exit from a multiemployer pension plan.