Restructuring Reserve (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment classfied as held for sale	$ 5,700,000	$ 0
Restructuring Reserve [Roll Forward]
Balance at January 1, 2011	605,000
Provision	2,106,000
Less: Payments	(1,511,000)
Balance at June 30, 2012	1,200,000
Severance & Personnel [Member]
Restructuring Reserve [Roll Forward]
Balance at January 1, 2011	0
Provision	783,000
Less: Payments	(783,000)
Balance at June 30, 2012	0
Other Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at January 1, 2011	605,000
Provision	1,323,000
Less: Payments	(728,000)
Balance at June 30, 2012	$ 1,200,000