Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Depreciable lives are summarized as follows:

Boeing 777, 767 and 757 aircraft and flight equipment	7 to 18 years
Ground equipment	2 to 10 years
Leasehold improvements, facilities and office equipment	3 to 25 years

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

	December 31, 2020		December 31, 2019
Flight equipment	$	2,856,142	$	2,598,113
Ground equipment	65,857		59,628
Leasehold improvements, facilities and office equipment	36,193		33,649
Aircraft modifications and projects in progress	231,451		220,827
	3,189,643		2,912,217
Accumulated depreciation	(1,249,867)		(1,146,197)
Property and equipment, net	$	1,939,776	$	1,766,020