Exit Activity Costs And Asset Impairments (Summary Of Exit Activity Costs And Asset Impairments) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Restructuring Cost and Reserve [Line Items]
Total exit activity costs and asset impairments	$ 515,000	$ 438,000	$ 2,173,000	$ 979,000
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges related to sales of facility			448,000	753,000
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Total exit activity costs and asset impairments	522,000	438,000	1,697,000	902,000
Selling General And Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Total exit activity costs and asset impairments	$ (7,000)		$ 476,000	$ 77,000