v3.26.1
Operating Revenues - Deferred revenue and unbilled revenue (Details) - Capacity Purchase Agreements - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Operating Revenues        
Total revenue recognized in excess of fixed monthly payments received during the period $ 26,872 $ 22,976 $ 50,786 $ 35,886
Capacity purchase agreements flight operations revenue (non-lease component)        
Operating Revenues        
Revenue recognized that was deferred in a prior period 16,803 11,760 34,294 21,220
Increase in unbilled revenue 2,935 5,619 993 5,707
Total revenue recognized in excess of fixed monthly payments received during the period 19,738 17,379 35,287 26,927
Capacity purchase agreements fixed aircraft lease revenue        
Operating Revenues        
Revenue recognized that was deferred in a prior period 6,134 3,799 13,391 6,034
Increase in unbilled revenue 1,000 1,798 2,108 2,925
Total revenue recognized in excess of fixed monthly payments received during the period $ 7,134 $ 5,597 $ 15,499 $ 8,959