Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss		$ (194,703)	$ (112,321)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Losses reclassified from other comprehensive income		51	58
Share-based compensation		4,046	4,254
Allowance for doubtful accounts (recoveries)		0	(170)
Amortization of deferred gains, losses and debt issuance costs		3,421	3,509
Depreciation and amortization		76,191	74,312
Accretion of 8.00% senior secured notes		261	434
Amortization of debt discount		2,538	0
Deferred income tax expense (benefit)		(49,647)	(26,869)
Loss on disposal of assets		11,552	1,117
Changes in operating assets and liabilities:
Accounts receivable, net		(31,844)	(57,256)
Aircraft maintenance deposits, net		(844)	1,755
Long-term deposits and other assets		(35,339)	4,998
Prepaid income taxes		0	(303)
Deferred heavy maintenance, net		(17,698)	(10,466)
Income tax receivable		0	109,988
Accounts payable		(5,188)	3,202
Air traffic liability		175,986	107,206
Other liabilities		80,568	83,042
Other		194	158
Net cash provided by operating activities		19,545	186,648
Investing activities:
Purchase of available-for-sale investment securities		(26,749)	(20,692)
Proceeds from the maturity and sale of available-for-sale investment securities		26,500	20,500
Pre-delivery deposits on flight equipment, net of refunds		(5,858)	(52,738)
Capitalized interest		(4,172)	(4,342)
Assets under construction for others		0	(797)
Purchase of property and equipment		(47,340)	(39,437)
Net cash used in investing activities		(57,619)	(97,506)
Financing activities:
Proceeds from issuance of long-term debt		0	25,338
Proceeds from issuance of warrants		0	2,146
Payments on debt obligations		(44,338)	(135,925)
Payments on finance lease obligations		(210)	(189)
Reimbursement for assets under construction for others		0	586
Repurchase of common stock		(1,772)	(1,307)
Debt issuance costs		(1,200)	(2,444)
Net cash used by financing activities		(47,520)	(111,795)
Net increase (decrease) in cash, cash equivalents, and restricted cash		(85,594)	(22,653)
Cash, cash equivalents, and restricted cash at beginning of period	[1]	1,428,907	1,861,124
Cash, cash equivalents, and restricted cash at end of period	[1]	1,343,313	1,838,471
Cash payments for:
Interest, net of capitalized interest		25,781	40,206
Income taxes paid (received), net		303	(109,056)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases		67,089	61,378
Financing cash flows for finance leases		18	24
Non-cash transactions:
Capital expenditures funded by operating lease borrowings		$ 129,213	$ 82,745

[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 our statement of cash flows.