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Goodwill and Other Intangible Assets
3 Months Ended
Mar. 31, 2013
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 three months ended March 31, 2013. 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 as of March 31, 2013 and December 31, 2012.
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
 
Useful Lives
 
(Amounts in thousands)
 
(in years)
As of March 31, 2013:
 
 
 
 
 
 
 
Customer relationships
$
51,755

 
$
(20,812
)
 
$
30,943

 
11
Trade names
15,400

 
(2,727
)
 
12,673

 
24
Technology
4,300

 
(1,827
)
 
2,473

 
10
Favorable leases
1,725

 
(1,724
)
 
1

 
3
Software
550

 
(550
)
 
0

 
2
Total intangible assets, net
$
73,730

 
$
(27,640
)
 
$
46,090

 
 
 
 
 
 
 
 
 
 
As of December 31, 2012:
 
 
 
 
 
 
 
Customer relationships
$
51,755

 
$
(19,585
)
 
$
32,170

 
11
Trade names
15,400

 
(2,567
)
 
12,833

 
24
Technology
4,300

 
(1,720
)
 
2,580

 
10
Favorable leases
1,725

 
(1,719
)
 
6

 
3
Software
550

 
(550
)
 
0

 
2
Total intangible assets, net
$
73,730

 
$
(26,141
)
 
$
47,589

 
 

Intangible assets are amortized on a straight-line basis over their useful lives. Intangible assets amortization expense was $1.5 million for both the three months ended March 31, 2013 and 2012. The following table presents the estimated future amortization expense related to intangible assets as of March 31, 2013:
 
Year Ending December 31,
 
Amortization Expense
 
 
(Amounts in thousands)
Remainder of 2013
 
$
4,487

2014
 
5,980

2015
 
5,980

2016
 
5,980

2017
 
5,253

Thereafter
 
18,410

Total
 
$
46,090