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Long-Term Debt, Finance Leases, and Other Borrowings - Schedule of Long-term Debt (Parenthetical) (Detail)
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Revolving Credit Facility Quaterly Collateralized By Underlying Equipment And Investments Through Two Thousand Twenty Eight [Member]    
Debt Instrument [Line Items]    
Debt instrument maturity year 2028 2028
Long term debt interest rate description quarterly interest based on SOFR plus interest spread at 4.50  
Revolving Credit Facility Quaterly Collateralized By Underlying Equipment And Investments Through Two Thousand Twenty Eight [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]    
Debt Instrument [Line Items]    
Long term debt, basis spread on variable rate 4.50%  
Notes Payable to Secured Parties, Due in Semi Annual Installments Collateralized by the Underlying Aircraft Through 2028 [Member]    
Debt Instrument [Line Items]    
Debt instrument maturity year 2028 2028
Long term debt interest rate description due in semi-annual installments, interest based on SOFR plus interest spread at 4.75% to 6.25%  
Notes Payable to Secured Parties, Due in Semi Annual Installments Collateralized by the Underlying Aircraft Through 2028 [Member] | Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]    
Debt Instrument [Line Items]    
Long term debt, basis spread on variable rate 4.75%  
Notes Payable to Secured Parties, Due in Semi Annual Installments Collateralized by the Underlying Aircraft Through 2028 [Member] | Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]    
Debt Instrument [Line Items]    
Long term debt, basis spread on variable rate 6.25%  
Notes Payable to the UST, Quarterly Through 2025 [Member]    
Debt Instrument [Line Items]    
Debt instrument maturity year 2025 2025
Long term debt interest rate description Notes payable to the UST, quarterly interest based on SOFR plus interest spread at 3.50  
Notes Payable to the UST, Quarterly Through 2025 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]    
Debt Instrument [Line Items]    
Long term debt, basis spread on variable rate 3.50%