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Intangible Assets
9 Months Ended
Sep. 30, 2011
Goodwill and Intangible Assets Disclosure [Abstract] 
Intangible Assets
Intangible Assets
 
The balances of the following intangible assets are included in other noncurrent assets on our condensed consolidated balance sheets:
 
Indefinite-lived Intangible Assets:
(in thousands)
 
September 30,
2011
 
December 31,
2010
 
September 30,
2010
Goodwill1
 
$
9,900

 
$
9,900

 
$
9,900

Use rights and other
 
1,319

 
1,319

 
1,319

Total unamortized intangible assets
 
$
11,219

 
$
11,219

 
$
11,219

1Goodwill for all periods presented primarily relates to our Construction segment.
 
Amortized Intangible Assets:
September 30, 2011
 
 
 
Accumulated
 
 
(in thousands)
 
Gross Value
 
Amortization
 
Net Value
Permits
 
$
29,713

 
$
(7,205
)
 
$
22,508

Customer lists
 
2,198

 
(1,885
)
 
313

Covenants not to compete
 
1,588

 
(1,439
)
 
149

Other
 
871

 
(545
)
 
326

Total amortized intangible assets
 
$
34,370

 
$
(11,074
)
 
$
23,296

December 31, 2010
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Permits
 
$
29,713

 
$
(6,100
)
 
$
23,613

Customer lists
 
2,198

 
(1,715
)
 
483

Covenants not to compete
 
1,588

 
(1,325
)
 
263

Other
 
871

 
(432
)
 
439

Total amortized intangible assets
 
$
34,370

 
$
(9,572
)
 
$
24,798

September 30, 2010
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Permits
 
$
33,582

 
$
(6,401
)
 
$
27,181

Customer lists
 
2,198

 
(1,658
)
 
540

Covenants not to compete
 
1,588

 
(1,286
)
 
302

Other
 
1,082

 
(606
)
 
476

Total amortized intangible assets
 
$
38,450

 
$
(9,951
)
 
$
28,499


Amortization expense related to these intangible assets for the three and nine months ended September 30, 2011 was approximately $0.5 million and $1.5 million, respectively, and approximately $0.6 million and $1.8 million for the three and nine months ended September 30, 2010, respectively. Based on the amortized intangible assets balance at September 30, 2011, amortization expense expected to be recorded in the future is as follows: $0.5 million for the balance of 2011; $1.9 million in 2012; $1.6 million in 2013; $1.5 million in 2014; $1.5 million in 2015; and $16.3 million thereafter.