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

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property, Plant and Equipment

Depreciable lives are summarized as follows:

Boeing 767 and 757 aircraft and flight equipment	10 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, 2016			December 31, 2015
Flight equipment	$	1,541,872		$	1,372,099
Ground equipment	49,229			36,593
Leasehold improvements, facilities and office equipment	27,364			25,327
Aircraft modifications and projects in progress	113,518			52,717
	1,731,983			1,486,736
Accumulated depreciation	(730,991		)	(611,335		)
Property and equipment, net	$	1,000,992		$	875,401