Fair Value Measurements (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 lb	Sep. 30, 2012	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of deferred compensation invested in life insurance contracts	65.00%
Number of years long-term sales growth forecasted over	4 years
Average long-term sales growth forecast, over next 4 years, percent per year	20.00%
Derivative instruments outstanding	$ 0
Expired derivative liabilities recorded in accrued expenses and other current liabilities	100,000
Derivative asset recorded in prepaid expenses and other current assets			200,000
Number of pounds of aluminum settled at loss	4,700,000
Amount settled at loss	300,000
Charge due to early termination of leases of vacant facilities		(100,000)
Vacant Owned Facilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of vacant facilities owned	6	8
Number of vacant facilities reopened	2
Number of vacant owned facilities classified in fixed assets		5
Number of vacant facilities owned that did not exceed their carrying value	2	3
Impairment charge	100,000	500,000
Number of facilities a sale agreement has been signed on	1
Number of vacant owned properties classified as fixed assets	3
Estimated combined fair value		5,800,000
Number of vacant owned facilities sold at carrying value	1	2
Vacant Owned Facilities Classified In Fixed Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated combined fair value	4,000,000
Other Identifiable Intangible Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Non-cash impairment charge		1,200,000
Cost of Sales [Member] | Other Identifiable Intangible Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Non-cash impairment charge		$ 1,000,000