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Revenue Recognition (Tables)
6 Months Ended
Jun. 30, 2021
Revenue Recognition [Abstract]  
Disaggregation of Revenue [Table Text Block]
Three Months Ended June 30,Six Months Ended June 30,
(in thousands)2021202020212020
Scheduled service$225,613 $48,680 $357,540 $245,941 
Ancillary air-related charges213,445 65,294 334,518 242,258 
Co-brand redemptions4,689 2,546 8,383 7,232 
Total passenger revenue$443,747 $116,520 $700,441 $495,431 
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:
Six Months Ended June 30,
(in thousands)20212020
Balance at January 1$21,841 $15,613 
Points awarded (deferral of revenue)10,696 10,962 
Points redeemed (recognition of revenue)(8,383)(7,232)
Balance at June 30$24,154 $19,343