Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Operating activities:
Net income (loss)		$ (643,805)	$ (263,812)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operations:
Losses reclassified from other comprehensive income		55	129
Share-based compensation		5,374	9,322
Allowance for doubtful accounts (recoveries)		822	159
Amortization of debt issuance costs		10,625	11,675
Depreciation and amortization		249,860	241,335
Accretion of 8.00% senior secured notes		3,157	3,157
Amortization of debt discount		8,650	5,262
Deferred income tax benefit		(36,208)	(66,877)
Loss (gain) on disposal of assets		(13,885)	5,652
Changes in operating assets and liabilities:
Accounts receivable, net		(20,972)	26,158
Deposits and other assets		(59,303)	(23,105)
Deferred heavy maintenance		(74,739)	(162,675)
Income tax receivable		(4,193)	35,712
Accounts payable		(23,508)	9,406
Air traffic liability		75,807	(263)
Other liabilities		(109,826)	106,769
Other		(2,203)	(1,890)
Net cash provided by (used in) operating activities		(634,292)	(63,886)
Investing activities:
Purchase of available-for-sale investment securities		(132,040)	(95,473)
Proceeds from the maturity and sale of available-for-sale investment securities		131,100	93,770
Proceeds from sale of property and equipment		164,313	52,466
Pre-delivery deposit and other payments on flight equipment		(3,648)	(86,245)
Pre-delivery deposit refunds on flight equipment		349,830	88,223
Capitalized interest		(13,171)	(16,117)
Assets under construction for others		1,376	(11,086)
Purchase of property and equipment		(91,754)	(211,083)
Net cash provided by (used in) investing activities		406,006	(185,545)
Financing activities:
Proceeds from issuance of long-term debt		123,500	0
Payments on debt obligations		(151,517)	(287,005)
Payments for the early extinguishment of debt		(124,007)	0
Payments on finance lease obligations		(257)	(408)
Reimbursement for assets under construction for others		(1,159)	11,088
Repurchase of common stock		(649)	(1,708)
Debt issuance and refinancing costs		(8,603)	(555)
Net cash provided by (used in) financing activities		(162,692)	(278,588)
Net increase (decrease) in cash, cash equivalents, and restricted cash		(390,978)	(528,019)
Cash, cash equivalents, and restricted cash at beginning of period	[1]	984,611	1,465,742
Cash, cash equivalents, and restricted cash at end of period	[1]	593,633	937,723
Cash payments for:
Interest, net of capitalized interest		126,127	101,729
Income taxes paid (received), net		7,384	(32,724)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases		388,328	289,465
Financing cash flows for finance leases		25	25
Non-cash transactions:
Capital expenditures funded by finance lease borrowings		274	145
Capital expenditures funded by operating lease borrowings		$ 1,177,514	$ 821,133

[1] (1) The sum of cash and cash equivalents and restricted cash on the Company's condensed consolidated balance sheets equals cash, cash equivalents, and restricted cash in the Company's condensed consolidated statement of cash flows.