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Long-Term Debt and Financing Arrangements - Schedule of Outstanding Debt (Parenthetical) (Detail)
9 Months Ended
Sep. 30, 2025
EASO Transaction [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 13.95%
Secured Equipment Note Maturing in 2030 [Member]  
Debt Instrument [Line Items]  
Equipment notes due period 2030
Payment Frequency monthly
Secured Equipment Note Maturing in 2030 [Member] | Commencing on 2025 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2025
Secured Equipment Notes Maturing in 2029 [Member]  
Debt Instrument [Line Items]  
Equipment notes due period 2029
Payment Frequency monthly
Secured Equipment Notes Maturing in 2029 [Member] | Commencing on 2024 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2024
Secured Equipment Notes Maturing in 2028 [Member]  
Debt Instrument [Line Items]  
Equipment notes due period 2028
Payment Frequency monthly
Secured Equipment Notes Maturing in 2028 [Member] | Commencing on 2023 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2023
Secured Equipment Notes Maturing in 2027 [Member]  
Debt Instrument [Line Items]  
Equipment notes due period 2027
Payment Frequency monthly
Secured Equipment Notes Maturing in 2027 [Member] | Commencing on 2023 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2023
Secured Equipment Notes Maturing in 2027 [Member] | Commencing on 2022 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2022
Secured Equipment Notes Maturing in 2026 [Member]  
Debt Instrument [Line Items]  
Equipment notes due period 2026
Payment Frequency monthly
Secured Equipment Notes Maturing in 2026 [Member] | Commencing on 2021 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2021
Secured Equipment Notes Maturing in 2025 [Member]  
Debt Instrument [Line Items]  
Equipment notes due period 2025
Payment Frequency monthly
Secured Equipment Notes Maturing in 2025 [Member] | Commencing on 2020 [Member]  
Debt Instrument [Line Items]  
Equipment notes, date of first required payment 2020
Minimum [Member] | Secured Equipment Note Maturing in 2030 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 5.10%
Minimum [Member] | Secured Equipment Notes Maturing in 2029 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 5.11%
Minimum [Member] | Secured Equipment Notes Maturing in 2028 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 5.21%
Minimum [Member] | Secured Equipment Notes Maturing in 2027 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 2.07%
Minimum [Member] | Secured Equipment Notes Maturing in 2026 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 1.48%
Minimum [Member] | Secured Equipment Notes Maturing in 2025 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 1.51%
Maximum [Member] | Secured Equipment Note Maturing in 2030 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 5.40%
Maximum [Member] | Secured Equipment Notes Maturing in 2029 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 6.24%
Maximum [Member] | Secured Equipment Notes Maturing in 2028 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 6.32%
Maximum [Member] | Secured Equipment Notes Maturing in 2027 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 6.45%
Maximum [Member] | Secured Equipment Notes Maturing in 2026 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 2.41%
Maximum [Member] | Secured Equipment Notes Maturing in 2025 [Member]  
Debt Instrument [Line Items]  
Interest rate secured debt 1.80%