Property and Equipment (Tables)

3 Months Ended

Mar. 31, 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):

	March 31, 2022		December 31, 2021
Flight equipment	$	3,364,376	$	3,301,113
Ground equipment	66,759		64,641
Leasehold improvements, facilities and office equipment	39,090		38,769
Aircraft modifications and projects in progress	262,380		206,917
	3,732,605		3,611,440
Accumulated depreciation	(1,550,529)		(1,481,506)
Property and equipment, net	$	2,182,076	$	2,129,934