Goodwill, Intangibles and Equity Investments - Schedule of Acquired Intangible Assets (Details) $ in Thousands	3 Months Ended
Mar. 31, 2023 USD ($)
Finite and Indefinite-lived Intangible Assets [Roll Forward]
Carrying value at beginning of period, airline certificates	$ 96,668
Carrying value at beginning of period, amortizing intangibles	87,668
Amortization of Intangible Assets	(2,552)
Carrying value at end of period, airline certificates	94,116
Carrying value at end of period, amortizing intangibles	85,116
Airline Certificates
Finite and Indefinite-lived Intangible Assets [Roll Forward]
Carrying value at beginning of period, airline certificates	9,000
Carrying value at end of period, airline certificates	$ 9,000

Finite and Indefinite-lived Intangible Assets [Roll Forward]

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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