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Rental Expense And Contractual Commitments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Contractual Commitments [Line Items]
Rental expenses for continuing operations from the consecutive year	$ 3.6	$ 3.2	$ 2.9
Contractual obligations for plant construction and purchases of real property and equipment amounted	16.4
Capacity Expansion In Cabo De Santo Agostinho [Member]
Contractual Commitments [Line Items]
Contractual commitments due within one year	$ 14.0

X

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X

- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

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X

- Definition

Amount of contractual obligation maturing in the next fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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