Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

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

	September 30, 2018			December 31, 2017
Flight equipment	$	1,927,864		$	1,801,808
Ground equipment	55,548			53,523
Leasehold improvements, facilities and office equipment	28,609			26,897
Aircraft modifications and projects in progress	152,202			121,760
	2,164,223			2,003,988
Accumulated depreciation	(937,723		)	(844,026		)
Property and equipment, net	$	1,226,500		$	1,159,962