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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The following table presents the goodwill balance by reportable segment (in thousands):
December 31,
 
2017
 
2016
Construction
 
$
29,260

 
$
29,260

Large Project Construction
 
22,593

 
22,593

Construction Materials
 
1,946

 
1,946

Total goodwill
 
$
53,799

 
$
53,799
Schedule of Finite-Lived Intangible Assets by Major Class
Amortized Intangible Assets
The following is the breakdown of our amortized intangible assets that are included in other noncurrent assets in the consolidated balance sheets (in thousands):
 
 
 
 
Accumulated
 
 
December 31, 2017
 
Gross Value
 
Amortization
 
Net Value
Permits
 
$
25,959

 
$
(12,504
)
 
$
13,455

Customer lists
 
2,200

 
(1,467
)
 
733

Trade name
 
4,100

 
(2,159
)
 
1,941

Covenants not to compete and other
 
50

 
(26
)
 
24

Total amortized intangible assets
 
$
32,309

 
$
(16,156
)
 
$
16,153

December 31, 2016
 
 
 
 
 
 
Permits
 
$
25,959

 
$
(11,514
)
 
$
14,445

Acquired backlog
 
1,500

 
(1,472
)
 
28

Customer lists
 
2,200

 
(1,174
)
 
1,026

Trade name
 
4,100

 
(1,727
)
 
2,373

Covenants not to compete and other
 
50

 
(24
)
 
26

Total amortized intangible assets
 
$
33,809

 
$
(15,911
)
 
$
17,898