Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [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, 2014			December 31, 2013
Flight equipment	$	1,285,966		$	1,167,737
Ground equipment	33,677			42,368
Leasehold improvements, facilities and office equipment	25,180			11,737
Aircraft modifications and projects in progress	18,612			68,487
	1,363,435			1,290,329
Accumulated depreciation	(516,167		)	(452,157		)
Property and equipment, net	$	847,268		$	838,172