Summary of Financial Statement Preparation and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property, Plant and Equipment

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

	June 30, 2018			December 31, 2017
Flight equipment	$	1,870,120		$	1,801,808
Ground equipment	54,165			53,523
Leasehold improvements, facilities and office equipment	28,660			26,897
Aircraft modifications and projects in progress	148,999			121,760
	2,101,944			2,003,988
Accumulated depreciation	(900,947		)	(844,026		)
Property and equipment, net	$	1,200,997		$	1,159,962