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Long-Term Debt - Narrative (Details) $ in Thousands		1 Months Ended			3 Months Ended	9 Months Ended
	Sep. 29, 2023 USD ($) Aircraft	Jun. 30, 2023 USD ($)	May 31, 2023 USD ($) Aircraft	Feb. 28, 2023 USD ($) Aircraft	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 27, 2023 USD ($)	Feb. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 92,700
Proceeds from (repayments of) debt	$ 112,800
Debt instrument with collateralized aircraft, term	12 years
Other noncurrent liabilities					$ 3,569,191	$ 3,569,191			$ 3,290,599
A-320
Debt Instrument [Line Items]
Number of collateralized aircraft | Aircraft	7
B-737-Max
Debt Instrument [Line Items]
Number of collateralized aircraft | Aircraft	4
Consolidated Variable Interest Entity | A-320
Debt Instrument [Line Items]
Number of aircrafts included as collateral | Aircraft			6	1
Variable Interest Entity, Primary Beneficiary | Consolidated Variable Interest Entity
Debt Instrument [Line Items]
Other noncurrent liabilities				$ 27,000
Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from lines of credit						$ 164,800
Repayments of lines of credit		$ 61,000			$ 112,800
Revolving Credit Facility | BNP Paribas and JSA International U.S. Holdings, LLC
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity							$ 412,100
Line of credit, current	$ 196,400
Revolving Credit Facility | Credit Agricole Corporate and Investment Bank
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity								$ 100,000

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