Restructuring Reserve and Plant Closures (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2011		$ 1,099,000
Restructuring charges		1,189,000
Cash payments		(1,646,000)
Balance as of June 30, 2012	642,000	642,000
Severance [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2011		1,068,000
Restructuring charges		(68,000)
Cash payments		(363,000)
Balance as of June 30, 2012	637,000	637,000
Facility Exit Costs & Other [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2011		31,000
Restructuring charges		1,257,000
Cash payments		(1,283,000)
Balance as of June 30, 2012	5,000	5,000
Office Furniture [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	400,000	1,600,000
Severance costs	300,000	1,200,000
Other restructuring costs	$ 100,000	$ 400,000