Debt Instrument, Market-to-Market Adjustments For Convertible Notes

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Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Aggregate amount of interest paid or due on all long-term debt.

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Amount of the fee for available but unused credit capacity under the credit facility.

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Debt and Other Obligations - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Commitment and other fees	$ 830	$ 612	$ 1,785	$ 1,644
Amortization of deferred financing costs	3,202	3,273	10,634	10,056
Total	23,708	35,709	91,712	120,177
Accretion expense			782	1,012
Amortization of debt discount			10,154	0
8.00% senior secured notes due 2025
Debt Instrument [Line Items]
Accretion expense	300	300	800	1,000
Interest expense	$ 10,200	10,200	$ 30,600	40,400
8.00% senior secured notes due 2025 \| 8.00% Senior Secured Notes Due 2025
Debt Instrument [Line Items]
Stated interest rate percentage	8.00%		8.00%		8.00%
Interest expense	$ 10,461	10,461	$ 31,382	41,436
Fixed-rate term loans
Debt Instrument [Line Items]
Interest expense	10,273	10,522	31,442	32,171
Unsecured term loans \| Unsecured term loans
Debt Instrument [Line Items]
Interest expense	344	344	1,020	824
Class A 2015-1 EETC
Debt Instrument [Line Items]
Interest expense	2,985	3,212	8,986	9,665
Class B 2015-1 EETC
Debt Instrument [Line Items]
Interest expense	581	671	1,772	2,039
Class C 2015-1 EETC
Debt Instrument [Line Items]
Interest expense	856	997	2,629	3,051
Class AA 2017-1 EETC
Debt Instrument [Line Items]
Interest expense	1,615	1,734	4,893	5,248
Class A 2017-1 EETC
Debt Instrument [Line Items]
Interest expense	582	625	1,764	1,892
Class B 2017-1 EETC
Debt Instrument [Line Items]
Interest expense	503	546	1,525	1,659
Class C 2017-1 EETC
Debt Instrument [Line Items]
Interest expense	1,104	1,104	3,275	3,275
Convertible notes
Debt Instrument [Line Items]
Interest expense	(9,641)	1,585	(9,442)	5,412
Convertible notes \| Convertible Debt Due In 2025 And 2026
Debt Instrument [Line Items]
Interest expense	1,600		4,700
Convertible notes \| Convertible notes due 2026
Debt Instrument [Line Items]
Interest expense		1,600		5,400
Amortization of debt discount	3,800		10,200
Offset of market-to-market adjustment	(15,000)		(24,300)
Convertible notes \| Convertible Debt Due in 2025
Debt Instrument [Line Items]
Interest expense		1,600		5,400
Revolving credit facilities
Debt Instrument [Line Items]
Interest expense	0	0	0	1,733
Finance leases
Debt Instrument [Line Items]
Interest expense	$ 13	$ 23	$ 47	$ 72