Credit Loss Reserve and Allowances (Tables)  | 
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| Credit Loss [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable, Allowance for Credit Loss | 
 A summary of our allowances for credit losses were as follows (in thousands): 
 
(1) The current-period provision for expected credit losses was due primarily to the impact of COVID-19. One international airline partner in particular accounted for approximately 45% of the provision recorded during the three-month period ended March 31, 2020 and three other airline partners accounted for approximately 43% of the provision recorded during the same period because of financial distress caused by COVID-19. We will continue to monitor the financial conditions of all customers and will record additional credit losses in the future, as appropriate.
 
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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- References No definition available. 
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