Other Operating Charges (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Other Operating Costs [Line Items]
Unusual or infrequent item operating	$ 1,126,000	$ 920,000	$ 3,900,000	$ 1,762,000
Other Operating Expense
Other Operating Costs [Line Items]
Unusual or infrequent item operating	1,126,000	920,000	3,900,000	1,762,000
Other Severance And Nonrecurring Costs	300,000		900,000	1,200,000
Nondebtor Reorganization Items, Legal and Advisory Professional Fees		600,000		600,000
U.S. Residential Products | Other Operating Expense
Other Operating Costs [Line Items]
Unusual or infrequent item operating	33,000	59,000	157,000	64,000
U.S. Commercial Products | Other Operating Expense
Other Operating Costs [Line Items]
Unusual or infrequent item operating	208,000	151,000	295,000	177,000
European Roll Coated Aluminum | Other Operating Expense
Other Operating Costs [Line Items]
Unusual or infrequent item operating	44,000	16,000	190,000	500,000
European Engineered Products | Other Operating Expense
Other Operating Costs [Line Items]
Unusual or infrequent item operating	834,000	108,000	3,044,000	185,000
Other Severance And Nonrecurring Costs	800,000		1,400,000
Other Non-Allocated | Other Operating Expense
Other Operating Costs [Line Items]
Unusual or infrequent item operating	7,000	586,000	214,000	836,000
Fair Value, Inputs, Level 1 | European Engineered Products | Other Operating Expense
Other Operating Costs [Line Items]
Asset impairment charges			$ 1,600,000