Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Depreciable lives are summarized as follows:

Boeing 777, 767, 757 and 737 aircraft and flight equipment	7 to 18 years
Ground equipment	3 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, 2019			December 31, 2018
Flight equipment	$	2,598,113		$	2,340,840
Ground equipment	59,628			57,455
Leasehold improvements, facilities and office equipment	33,649			28,745
Aircraft modifications and projects in progress	220,827			74,449
	2,912,217			2,501,489
Accumulated depreciation	(1,146,197		)	(946,484		)
Property and equipment, net	$	1,766,020		$	1,555,005