Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting
Number of reporting segments | segment	2
Operating revenues	$ 691,831	$ 735,152
Operating expense	696,535	683,104
Depreciation and amortization expense	94,149	102,745
Interest expense	33,620	28,592
Segment profit (loss)	(38,324)	23,456
Total assets	7,233,761	7,148,958	$ 7,414,553
Capital expenditures (including non-cash)	107,921	127,585
SkyWest Airlines
Segment Reporting
Operating revenues	568,173	603,048
Operating expense	633,392	621,028
Depreciation and amortization expense	38,258	47,694
Interest expense	4,062	1,789
Segment profit (loss)	(69,281)	(19,769)
Total assets	2,629,521	2,953,902
Capital expenditures (including non-cash)	21,111	32,696
SkyWest Leasing
Segment Reporting
Operating revenues	123,658	132,104
Operating expense	63,143	62,076
Depreciation and amortization expense	55,891	55,051
Interest expense	29,558	26,803
Segment profit (loss)	30,957	43,225
Total assets	4,604,240	4,195,056
Capital expenditures (including non-cash)	$ 86,810	$ 94,889