CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CONSOLIDATED STATEMENTS OF CASH FLOWS
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 343,535	$ 686,955
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(1,758,125)	(1,071,637)
Sales of marketable securities	1,390,198	1,041,149
Acquisition of property and equipment:
Aircraft and rotable spare parts	(522,683)	(223,605)
Buildings and ground equipment	(11,365)	(10,473)
Proceeds from the sale of property and equipment	8,494	7,104
Deposits on aircraft	(37,100)	(100,105)
Aircraft deposits applied towards acquired aircraft	115,085	10,987
Increase in other assets	(49,073)	(50,205)
NET CASH USED IN INVESTING ACTIVITIES	(864,569)	(396,785)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	601,389	213,326
Principal payments on long-term debt	(299,785)	(448,466)
Net proceeds from issuance of common stock	2,958	3,146
Employee income tax paid on vested equity awards	(1,150)	(1,573)
Payment of debt issuance cost	(1,949)	(495)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	301,463	(234,062)
Increase (decrease) in cash and cash equivalents	(219,571)	56,108
Cash and cash equivalents at beginning of period	258,421	215,723
CASH AND CASH EQUIVALENTS AT END OF PERIOD	38,850	271,831
Non-cash investing and financing activities:
Acquisition of property and equipment	15,801	13,168
Warrants issued to U.S. Treasury		5,804
Cash paid during the period for:
Interest, net of capitalized amounts	92,230	96,397
Income taxes	$ 356	$ 6,374