Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment, to be held and used, is summarized as follows (in thousands):

	June 30, 2022		December 31, 2021
Flight equipment	$	3,405,297	$	3,301,113
Ground equipment	$	68,565	64,641
Leasehold improvements, facilities and office equipment	$	39,216	38,769
Aircraft modifications and projects in progress	$	308,306	206,917
	$	3,821,384	3,611,440
Accumulated depreciation	$	(1,550,728)	(1,481,506)
Property and equipment, net	$	2,270,656	$	2,129,934