Condensed Consolidated Statements of Operations (unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues:
Revenues	$ 401,922,000	$ 991,968,000	$ 1,311,532,000	$ 2,860,720,000
Operating expenses:
Aircraft fuel	94,285,000	253,847,000	327,403,000	748,489,000
Salaries, wages and benefits	228,370,000	224,069,000	682,429,000	644,345,000
Landing fees and other rents	76,526,000	69,142,000	183,995,000	193,502,000
Depreciation and amortization	71,351,000	57,712,000	206,455,000	163,351,000
Aircraft rent	49,379,000	40,026,000	143,781,000	132,330,000
Distribution	17,882,000	39,160,000	62,977,000	115,481,000
Maintenance, materials and repairs	28,213,000	36,152,000	81,516,000	102,444,000
Loss on disposal of assets	0	13,410,000	0	16,873,000
Special credits	(148,308,000)	0	(300,219,000)	0
Other operating	83,695,000	133,769,000	271,042,000	367,482,000
Total operating expenses	501,393,000	867,287,000	1,659,379,000	2,484,297,000
Operating income (loss)	(99,471,000)	124,681,000	(347,847,000)	376,423,000
Other (income) expense:
Interest expense	33,435,000	25,138,000	85,105,000	75,375,000
Capitalized interest	(4,009,000)	(3,400,000)	(11,430,000)	(8,932,000)
Interest income	(454,000)	(6,292,000)	(5,996,000)	(20,282,000)
Other (income) expense	77,000	222,000	124,000	599,000
Total other (income) expense	29,049,000	15,668,000	67,803,000	46,760,000
Income (loss) before income taxes	(128,520,000)	109,013,000	(415,650,000)	329,663,000
Provision (benefit) for income taxes	(29,380,000)	25,549,000	(144,254,000)	75,622,000
Net income (loss)	$ (99,140,000)	$ 83,464,000	$ (271,396,000)	$ 254,041,000
Basic earnings (loss) per share (in dollars per share)	$ (1.07)	$ 1.22	$ (3.38)	$ 3.71
Diluted earnings (loss) per share (in dollars per share)	$ (1.07)	$ 1.22	$ (3.38)	$ 3.71
Passenger
Operating revenues:
Revenues	$ 392,744,000	$ 973,353,000	$ 1,277,111,000	$ 2,805,848,000
Other
Operating revenues:
Revenues	$ 9,178,000	$ 18,615,000	$ 34,421,000	$ 54,872,000