Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2017

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, 2017			December 31, 2016
Flight equipment	$	1,689,027		$	1,541,872
Ground equipment	51,209			49,229
Leasehold improvements, facilities and office equipment	27,385			27,364
Aircraft modifications and projects in progress	157,251			113,518
	1,924,872			1,731,983
Accumulated depreciation	(813,671		)	(730,991		)
Property and equipment, net	$	1,111,201		$	1,000,992