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Revenue Recognition (Tables)
9 Months Ended
Sep. 30, 2021
Revenue Recognition [Abstract]  
Disaggregation of Revenue [Table Text Block]
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)2021202020212020
Scheduled service$195,225 $79,464 $552,765 $325,404 
Ancillary air-related charges224,170 100,262 558,687 342,520 
Co-brand redemptions4,401 2,190 12,785 9,423 
Total passenger revenue$423,796 $181,916 $1,124,237 $677,347 
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
The following table presents the activity of the co-brand point liability for the periods indicated:
Nine Months Ended September 30,
(in thousands)20212020
Balance at January 1$21,841 $15,613 
Points awarded (deferral of revenue)23,319 15,018 
Points redeemed (recognition of revenue)(12,785)(9,510)
Balance at September 30$32,375 $21,121