Business Segments (Details 3)	12 Months Ended
Dec. 31, 2012 item	Dec. 31, 2010 Sales Customer concentration Independent representative
Sales and accounts receivable
Percentage of sales and accounts receivable (as a percent)		10.00%
Number of independent representatives	1

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.

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

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-Name Accounting Standards Codification

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

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

-Publisher FASB

-Name Accounting Standards Codification

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Data Type:	num:percentItemType
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Period Type:	duration