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Borrowing Arrangements (Details 4)			1 Months Ended	12 Months Ended
Borrowing Arrangements (Details 4)	Jun. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Apr. 30, 2011 Belgian Loan	Dec. 31, 2011 Belgian Loan EUR (€)	Jun. 30, 2013 Belgian Loan USD ($)	Jun. 30, 2013 Belgian Loan EUR (€)	Dec. 31, 2012 Belgian Loan USD ($)	Dec. 31, 2012 Belgian Loan EUR (€)	Dec. 31, 2011 Belgian Loan Maximum EUR (€)	Dec. 31, 2012 Japanese Term Loan USD ($)	Dec. 31, 2012 Japanese Term Loan JPY (¥)
Long-term Debt
Principal amount									€ 6,000,000	$ 7,700,000	¥ 722,000,000
Bond installment increments for drawing on the loan				120,000		0
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%
Amount outstanding					156,000	120,000	158,000	120,000
Short-term debt	$ 61,000	$ 19,565,000								$ 954,000	¥ 82,000,000

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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