v3.26.1
Operating Revenues - Deferred revenue and unbilled revenue (Details) - Capacity Purchase Agreements - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Nature of Operations and Summary of Significant Accounting Policies [Line Items]    
Total revenue recognized in excess of fixed monthly payments received during the period $ 23,914 $ 12,910
Capacity purchase agreements flight operations revenue (non-lease component)    
Nature of Operations and Summary of Significant Accounting Policies [Line Items]    
Revenue recognized that was deferred in a prior period 17,491 9,460
Increase (decrease) in unbilled revenue (1,942) 88
Total revenue recognized in excess of fixed monthly payments received during the period 15,549 9,548
Capacity purchase agreements fixed aircraft lease revenue    
Nature of Operations and Summary of Significant Accounting Policies [Line Items]    
Revenue recognized that was deferred in a prior period 7,257 2,235
Increase (decrease) in unbilled revenue 1,108 1,127
Total revenue recognized in excess of fixed monthly payments received during the period $ 8,365 $ 3,362