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Concentrations (Details) (Sales Revenue, Customer Concentration Risk)
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9 Months Ended | |
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Sep. 30, 2014
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Sep. 30, 2013
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Sales Revenue | Customer Concentration Risk
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| Concentration Risk [Line Items] | ||
| Southwest Airlines, Concentration Risk, Percentage | 22.00% | 14.00% |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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