Other Intangible Assets, net
 12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Intangible Assets, net
OTHER INTANGIBLE ASSETS, NET

Other intangible assets, net consisted of the following (dollars in thousands):
 
 
 
Useful Life
(in years)
 
As of December 31,
 
Reportable Segment
 
 
2015
 
2014
Customer relationships
Global Defense and Security
 
9
 
$
19,300

 
$
19,300

Customer relationships
Commercial Aviation Services
 
2
 
2,500

 
2,500

Type Certificate for engines used in Aircranes
Manufacturing and MRO
 
Indefinite
 
2,205

 
2,205

 
 
 
 
 
24,005

 
24,005

Less: accumulated amortization
 
 
 
 
(8,218
)
 
(3,952
)

 
 
 
 
$
15,787

 
$
20,053



During 2015, based on changes in our Brazil operations, we changed the estimated useful life of the customer relationship intangible asset related to our Commercial Aviation Services segment from nine years to two years, resulting in an increase in amortization expense of $1.0 million for the year ended December 31, 2015, or $0.05 per share. As of December 31, 2015, such intangible asset is fully amortized.

Amortization expense for other intangible assets was $3.5 million for the year ended December 31, 2015, and $2.4 million and $1.8 million for 2014 and 2013, respectively, which was included in cost of revenues on the consolidated statements of operations. As of December 31, 2015, future estimated amortization expense for other intangible assets is as follows (in thousands):

Year Ending December 31:
 
2016
$
2,144

2017
2,144

2018
2,144

2019
2,144

2020
2,144

Thereafter
2,862

 
$
13,582