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Market Concentrations (Schedule of Revenues Concentration from Major Customers and Narrative) (Details) (Customer Concentration Risk)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sales Revenue, Goods, Gross | Customer 1
Concentration Risk [Line Items]
Concentration risk, percentage	35.00%	36.00%	35.00%
Sales Revenue, Goods, Gross | Customer 2
Concentration Risk [Line Items]
Concentration risk, percentage	30.00%	28.00%	31.00%
Sales Revenue, Goods, Gross | Customer 3
Concentration Risk [Line Items]
Concentration risk, percentage	28.00%	31.00%	26.00%
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	81.00%	95.00%
Concentration risk, number of major customers exceeding 10 percent threshhold	3

X

- Definition

Concentration risk, number of major customers exceeding 10 percent threshhold

+ References

No definition available.

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X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611

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