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Goodwill and Other Intangible Assets
3 Months Ended
Mar. 31, 2014
Goodwill and Other Intangible Assets [Abstract]  
Goodwill and Other Intangible Assets
(3)
Goodwill and Other Intangible Assets

Goodwill

The carrying amount of goodwill in each of our segments remained unchanged in the three months ended March 31, 2014. 
 
 Other Intangible Assets

Our intangible assets subject to amortization are summarized as of March 31, 2014 as follows:
 
 
 
  
March 31, 2014
 
 
 
Weighted Average
Remaining
Amortization Period
(Years)
  
Gross Carrying Amount
  
Accumulated Amortization
 
Purchased software
  
3.2
  
$
32,357
  
$
17,912
 
Capitalized software
  
4.4
   
2,506
   
1,729
 
Customer relationships
  
5.1
   
46,333
   
24,498
 
Backlog
  
0.8
   
9,680
   
9,506
 
Trade names
  
6.8
   
1,463
   
645
 
Non-competes
  
3.1
   
3,190
   
1,788
 
Total
     
$
95,529
  
$
56,078
 

Estimated aggregate amortization expense for our intangible assets, which become fully amortized in 2023, is as follows:
 
For the remaining nine months of the year ending December 31:
2014
  
9,342
 
For the year ending December 31:
2015
  
10,063
 
2016
  
8,043
 
 
2017
  
5,861
 
 
2018
  
3,625
 
 
Thereafter
  
2,517
 
 
Total
 
$
39,451
 
 
Amortization expense in the three months ended March 31, 2014 and 2013 is set forth in the following table:
 
 
 
Three Months Ended
March 31,
 
 
 
2014
  
2013
 
Amortization included in cost of sales:
 
  
 
Purchased software
 
$
1,258
  
$
1,126
 
Capitalized software
  
43
   
37
 
Backlog
  
58
   
359
 
Subtotal
  
1,359
   
1,522
 
 
        
Amortization included in operating expenses:
        
Customer relationships
  
1,758
   
1,904
 
Trade names
  
40
   
40
 
Non-competes
  
115
   
115
 
Subtotal
  
1,913
   
2,059
 
Total amortization
 
$
3,272
  
$
3,581