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Goodwill and Other Intangible Assets
9 Months Ended
Sep. 30, 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 nine months ended September 30, 2014. Goodwill is reviewed annually for impairment 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 as of September 30, 2014 and December 31, 2013.
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
 
Useful Lives
 
(Amounts in thousands)
 
(in years)
As of September 30, 2014:
 
 
 
 
 
 
 
Customer relationships
$
51,755

 
$
(28,175
)
 
$
23,580

 
11
Trade names
15,400

 
(3,690
)
 
11,710

 
24
Technology
4,300

 
(2,472
)
 
1,828

 
10
Favorable leases
1,725

 
(1,725
)
 
0

 
3
Software
550

 
(550
)
 
0

 
2
Total intangible assets, net
$
73,730

 
$
(36,612
)
 
$
37,118

 
 
 
 
 
 
 
 
 
 
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
Software
550

 
(550
)
 
0

 
2
Total intangible assets, net
$
73,730

 
$
(32,127
)
 
$
41,603

 
 

Intangible assets are amortized on a straight-line basis over their useful lives. Intangible assets amortization expense was $1.5 million for the three months ended September 30, 2014 and 2013, respectively, and $4.5 million for the nine months ended September 30, 2014 and 2013, respectively. The following table presents the estimated future amortization expenses related to intangible assets as of September 30, 2014:
 
Year Ending
 
Amortization Expense
 
 
(Amounts in thousands)
Remainder of 2014

$
1,495

2015
 
5,980

2016
 
5,980

2017
 
5,253

2018
 
5,239

Thereafter
 
13,171

Total
 
$
37,118