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