v3.26.3
Operating Revenues - Deferred revenue and unbilled revenue (Details) - Capacity Purchase Agreements - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Operating Revenues        
Total revenue recognized in excess of fixed monthly payments received during the period $ 23,454 $ 17,082 $ 74,240 $ 52,968
Capacity purchase agreements flight operations revenue (non-lease component)        
Operating Revenues        
Revenue recognized that was deferred in a prior period 14,331 7,487 48,625 28,707
Increase in unbilled revenue 1,336 3,786 2,329 9,493
Total revenue recognized in excess of fixed monthly payments received during the period 15,667 11,273 50,954 38,200
Capacity purchase agreements fixed aircraft lease revenue        
Operating Revenues        
Revenue recognized that was deferred in a prior period 5,656 4,481 19,047 10,515
Increase in unbilled revenue 2,131 1,328 4,239 4,253
Total revenue recognized in excess of fixed monthly payments received during the period $ 7,787 $ 5,809 $ 23,286 $ 14,768