Other Operating Charges (Details) (USD $)	3 Months Ended
	Apr. 03, 2015	Mar. 28, 2014
Other Operating Costs [Line Items]
Other operating charges	$ 2,263,000	$ 965,000
Other operating charges
Other Operating Costs [Line Items]
Other operating charges	2,263,000	965,000
Retention costs	800,000
Professional and contract services expense	700,000
Other severance and nonrecurring costs	300,000
Other operating charges | United States
Other Operating Costs [Line Items]
Restructuring and related cost, incurred cost		100,000
U.S. Residential Products | Other operating charges
Other Operating Costs [Line Items]
Other operating charges	0	108,000
U.S. Commercial Products | Other operating charges
Other Operating Costs [Line Items]
Other operating charges	0	30,000
European Roll Coated Aluminum | Other operating charges
Other Operating Costs [Line Items]
Other operating charges	268,000	0
Retention costs	300,000
European Engineered Products | Other operating charges
Other Operating Costs [Line Items]
Other operating charges	242,000	423,000
Restructuring and related cost, incurred cost	200,000	400,000
European Engineered Products | Other operating charges | France
Other Operating Costs [Line Items]
Other severance and nonrecurring costs		100,000
European Engineered Products | Other operating charges | U.K.
Other Operating Costs [Line Items]
Other severance and nonrecurring costs		300,000
Other Non-Allocated | Other operating charges
Other Operating Costs [Line Items]
Other operating charges	1,753,000	404,000
Professional and contract services expense		$ 400,000