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Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Depreciable lives of operating equipment are summarized as follows:
 
DC-8 combi aircraft and flight equipment
Less than 1 year
Boeing 767 and 757 aircraft and flight equipment
10 to 20 years
Support equipment
5 to 10 years
Vehicles and other equipment
3 to 8 years
Property and equipment, to be held and used, is summarized as follows (in thousands):
 
 
September 30,
2013
 
December 31,
2012
Aircraft and flight equipment
$
1,232,284

 
$
1,148,781

Support equipment
51,179

 
52,209

Vehicles and other equipment
1,706

 
1,597

Leasehold improvements
1,091

 
814

 
1,286,260

 
1,203,401

Accumulated depreciation
(437,710
)
 
(384,477
)
Property and equipment, net
$
848,550

 
$
818,924