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Intangible Assets
9 Months Ended
Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets
 
Indefinite-lived Intangible Assets:

Indefinite-lived intangible assets primarily consist of goodwill and use rights. Use rights of $0.4 million are included in other noncurrent assets on our condensed consolidated balance sheets as of September 30, 2013, December 31, 2012 and September 30, 2012.

The following table presents the goodwill balance by reporting segment:
(in thousands)
 
September 30,
2013
 
December 31,
2012
 
September 30,
2012
Construction
 
$
28,398

 
$
29,190

 
$
6,937

Large Project Construction
 
23,287

 
24,115

 
849

Construction Materials
 
2,114

 
2,114

 
2,114

Total goodwill
 
$
53,799

 
$
55,419

 
$
9,900



The change in goodwill and in the gross value of amortized intangible assets during each period is due to the acquisition of Kenny. See Note 18 for further details.

Amortized Intangible Assets:

Following is the breakdown of our amortized intangible assets that are included in other noncurrent assets on our condensed consolidated balance sheets:
September 30, 2013
 
 
 
Accumulated
 
 
(in thousands)
 
Gross Value
 
Amortization
 
Net Book Value
Permits
 
$
29,713

 
$
(11,711
)
 
$
18,002

Customer lists
 
4,398

 
(2,418
)
 
1,980

Covenants not to compete
 
1,588

 
(1,551
)
 
37

Acquired backlog
 
7,900

 
(5,147
)
 
2,753

Trade name
 
4,100

 
(324
)
 
3,776

Other
 
871

 
(827
)
 
44

Total amortized intangible assets
 
$
48,570

 
$
(21,978
)
 
$
26,592

December 31, 2012
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Permits
 
$
29,713

 
$
(10,869
)
 
$
18,844

Customer lists
 
4,698

 
(2,170
)
 
2,528

Covenants not to compete
 
1,588

 
(1,546
)
 
42

Acquired backlog
 
8,400

 

 
8,400

Trade name
 
4,100

 

 
4,100

Other
 
871

 
(734
)
 
137

Total amortized intangible assets
 
$
49,370

 
$
(15,319
)
 
$
34,051

September 30, 2012
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Permits
 
$
29,713

 
$
(10,588
)
 
$
19,125

Customer lists
 
2,198

 
(2,113
)
 
85

Covenants not to compete
 
1,588

 
(1,541
)
 
47

Other
 
871

 
(696
)
 
175

Total amortized intangible assets
 
$
34,370

 
$
(14,938
)
 
$
19,432


Amortization expense related to these intangible assets for the three and nine months ended September 30, 2013 was approximately $2.2 million and $6.7 million, respectively, and approximately $1.2 million and $3.3 million for the three and nine months ended September 30, 2012, respectively. Based on the amortized intangible assets balance at September 30, 2013, amortization expense expected to be recorded in the future is as follows: $2.6 million for the remainder of 2013; $2.2 million in 2014; $2.1 million in 2015; $1.8 million in 2016; $1.7 million in 2017; and $16.2 million thereafter.