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Additional Financial Information (Narrative) (Details)	12 Months Ended
Additional Financial Information (Narrative) (Details)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Additional Financial Information [Line Items]
Number of customers exceeding threshold for significance	0	0	0
Threshold for customer significance (as a percent of consolidated revenues) (in hundredths)	10.00%	10.00%	10.00%

For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, this item identifies a second characteristic of the concentration. For example, "Europe" is the second characteristic in the phrase: "net assets in Europe are 70% of total net assets".

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