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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets
Goodwill
There were no changes in the carrying amount of goodwill for the year ended December 31, 2014. Goodwill is reviewed for impairment on an annual basis and more frequently if potential impairment indicators exist. No impairment indications were identified during any of the periods presented.
Other Intangible Assets
The following table presents the components of other intangible assets:
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
 
Useful Lives
 
(Amounts in thousands)
 
(in years)
As of December 31, 2014:
 
 
 
 
 
 
 
Customer relationships
$
51,755

 
$
(29,402
)
 
$
22,353

 
11
Trade names
15,400

 
(3,850
)
 
11,550

 
24
Technology
4,300

 
(2,580
)
 
1,720

 
10
Favorable leases
1,725

 
(1,725
)
 
0

 
3
Total intangible assets, net
$
73,180

 
$
(37,557
)
 
$
35,623

 
 
 
 
 
 
 
 
 
 
As of December 31, 2013:
 
 
 
 
 
 
 
Customer relationships
$
51,755

 
$
(24,494
)
 
$
27,261

 
11
Trade names
15,400

 
(3,208
)
 
12,192

 
24
Technology
4,300

 
(2,150
)
 
2,150

 
10
Favorable leases
1,725

 
(1,725
)
 
0

 
3
Total intangible assets, net
$
73,180

 
$
(31,577
)
 
$
41,603

 
 


Intangible assets are amortized on a straight-line basis over their useful lives. Intangible assets amortization expenses were $6.0 million, $6.0 million, and $6.2 million during 2014, 2013, and 2012, respectively. None of the intangible assets are anticipated to have a residual value. The following table presents the estimated future amortization expense related to intangible assets as of December 31, 2014:
Year Ending December 31,
Amortization Expense
 
(Amounts in thousands)
2015
$
5,980

2016
5,980

2017
5,253

2018
5,239

2019
4,809

Thereafter
8,362

Total
$
35,623