Business Acquisition and Disposition - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended				0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2013 Solvix [Member]	Nov. 08, 2012 Solvix [Member]	Apr. 08, 2013 Refusol [Member]	Jun. 30, 2013 Refusol [Member]	Jun. 30, 2013 Accrued Liabilities [Member] Solvix [Member]	Dec. 31, 2012 Accrued Liabilities [Member] Solvix [Member]	Jun. 30, 2013 Other Long Term Liabilities [Member] Solvix [Member]	Oct. 15, 2010 Gas Flow Control [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses														$ 43,300,000
Sales	139,711,000	115,658,000	251,525,000	221,445,000						19,800,000
Total fair value of consideration transferred								21,246,000	89,084,000
Payments to Acquire Businesses, Net of Cash Acquired			77,211,000	0			16,000,000		77,200,000
Business Acquisition, Contingent Consideration, Potential Cash Payment							7,900,000
Contingent consideration								5,253,000	11,873,000				2,300,000
Contingent consideration											1,982,000	2,773,000
Entity Number of Employees								10
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period					170,500,000	5,200,000
Net Income (Loss) Attributable to Parent	(9,782,000)	8,928,000	(2,956,000)	9,997,000						(5,400,000)
Restructuring charges	24,206,000	(144,000)	24,206,000	2,431,000						3,800,000
Amortization of intangible assets	1,975,000	1,351,000	4,188,000	2,723,000						700,000
Gain (Loss) on Disposition of Assets		$ 1,900,000