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Business Segments and Major Customers - Additional Information (Detail)
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12 Months Ended | ||
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Dec. 31, 2013
Customer
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Dec. 31, 2012
Customer
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Dec. 31, 2011
Customer
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Airline Partners [Member] | CA-NA [Member]
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| Segment Reporting Information [Line Items] | |||
| Number of airline partners subject to benchmark measurement | 2 | 2 | 2 |
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Revenue [Member] | Revenue Concentration Risk [Member]
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| Segment Reporting Information [Line Items] | |||
| Number of customers meeting concentration risk threshold | 0 | 0 | 0 |
| Percentage of benchmark | 10.00% | 10.00% | 10.00% |
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Revenue [Member] | Revenue Concentration Risk [Member] | Airline Partners [Member] | CA-NA [Member]
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| Segment Reporting Information [Line Items] | |||
| Percentage of benchmark | 41.00% | 39.00% | 34.00% |
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Accounts Receivable [Member] | Accounts Receivable Concentration Risk [Member]
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| Segment Reporting Information [Line Items] | |||
| Number of customers meeting concentration risk threshold | 0 | ||
| Percentage of benchmark | 10.00% | ||
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Accounts Receivable [Member] | Accounts Receivable Concentration Risk [Member] | CA-NA [Member]
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| Segment Reporting Information [Line Items] | |||
| Number of customers meeting concentration risk threshold | 1 | ||
| Percentage of benchmark | 15.00% | ||