Borrowing Arrangements (Details 3)	9 Months Ended					9 Months Ended				1 Months Ended	12 Months Ended																			9 Months Ended					9 Months Ended
	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 USD ($)	Dec. 31, 2012 U.S. Credit Facility due November 17, 2016 USD ($)	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 Minimum	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 Maximum	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 Letters of credit USD ($)	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 Base rate borrowings Prime rate	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 Base rate borrowings Overnight federal funds rate	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 Base rate borrowings LIBOR rate	Sep. 30, 2013 U.S. Credit Facility due November 17, 2016 LIBOR-based borrowings LIBOR rate	Apr. 30, 2011 Belgian Loan	Dec. 31, 2011 Belgian Loan EUR (€)	Sep. 30, 2013 Belgian Loan USD ($)	Sep. 30, 2013 Belgian Loan EUR (€)	Sep. 30, 2013 Belgian credit facility EUR (€)	Dec. 31, 2012 Belgian credit facility EUR (€)	Sep. 30, 2013 Belgian credit facility Bank guarantees EUR (€)	Dec. 31, 2012 Belgian credit facility Bank guarantees EUR (€)	Sep. 30, 2013 United Kingdom credit facility GBP (£)	Sep. 30, 2013 United Kingdom credit facility Bank guarantees GBP (£)	Dec. 31, 2012 United Kingdom credit facility Bank guarantees GBP (£)	Sep. 30, 2013 China Credit Facility USD ($)	Sep. 30, 2013 China Credit Facility CNY	Dec. 31, 2012 China Credit Facility USD ($)	Dec. 31, 2012 China Credit Facility CNY	Dec. 31, 2012 CCJ Japanese Term Loan due March 2013 USD ($)	Dec. 31, 2012 CCJ Japanese Term Loan due March 2013 JPY (¥)	Sep. 30, 2013 CCJ Japanese Term Loan due May 2017 USD ($)	Sep. 30, 2013 CCJ Japanese Term Loan due May 2017 JPY (¥)	May 10, 2013 CCJ Japanese Term Loan due May 2017 JPY (¥)	Sep. 30, 2013 CCJ Japanese Term Loan due May 2017 Uncollateralized Overnight Call Rate	Sep. 30, 2013 CCJ Japanese working capital loan USD ($)	Sep. 30, 2013 CCJ Japanese working capital loan JPY (¥)	Dec. 31, 2012 CCJ Japanese working capital loan USD ($)	Dec. 31, 2012 CCJ Japanese working capital loan JPY (¥)	Sep. 30, 2013 CCJ Japanese working capital loan Prime rate
Borrowing arrangements
Maximum borrowing capacity	$ 125,000,000				$ 30,000,000						€ 6,000,000			€ 2,000,000				£ 600,000			$ 1,600,000	10,000,000							¥ 1,000,000,000			¥ 1,500,000,000
Bond installment increments for drawing on the loan											120,000
Percentage of plant expansion investment that installment draw downs are based upon											25.00%
Maturity period										7 years
Interest rate (as a percent)												5.35%	5.35%
Aggregate increase in borrowing capacity that may be requested	50,000,000
Quarterly nonrefundable commitment fee payable (as a percent)	0.25%
Total availability under the revolving credit facility	84,800,000	78,600,000
Basis for variable interest rate						Lender prime rate	Weighted average federal funds rate	daily LIBOR	one, two, three or six month LIBOR																					Uncollateralized Overnight Call Rate					Short-term Prime Rate
Margin added to variable rate (as a percent)							3.00%	2.75%	1.25%
Rate of interest at balance sheet date (as a percent)			1.25%	1.44%																	5.32%	5.32%								0.70%					1.475%
Principal amount																									7,700,000	722,000,000
Amount outstanding	$ 38,000,000	$ 44,300,000										$ 100,000	€ 120,000	€ 0	€ 0	€ 1,000,000	€ 1,200,000		£ 400,000	£ 400,000	$ 300,000	1,700,000	$ 0	0	$ 1,000,000	¥ 82,000,000	$ 10,200,000	¥ 1,000,000,000			$ 0	¥ 0	$ 18,600,000	¥ 1,600,000,000