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Major Customers (Narrative) (Details) - number_of_largest_customers	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Major Customers [Abstract]
Sales to largest customers (Percentage)	47.00%	50.00%	53.00%
Number of customers	10	10	10

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- Definition

Major Customers Abstract

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- Definition

Number of largest customers accounted for portion of revenue

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Percentage of revenue accounted by major customers

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No definition available.

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