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Intangible Assets
 12 Months Ended
Dec. 31, 2011
Intangible Assets  
Intangible Assets

Note 10—Intangible Assets

 

At December 31, 2011 and 2010, intangible assets totaled $32,021 and $40,633, respectively, net of amortization.  In December 2010, the Company determined that the net intangible assets of $991 related to the 2009 Cravens acquisition in the East Construction Services segment were impaired, and were written off as selling, general and administrative expenses on the consolidated statements of income.

 

 The following table summarizes the intangible asset categories, amounts and the average amortization periods which are generally on a straight-line basis, at December 31:

 

 

 

Amortization

 

 

 

Amount

 

 

 

Period

 

 

 

2011

 

2010

 

Tradename

 

5 to 10 years

 

 

 

$

18,791

 

$

21,078

 

Non-compete agreements

 

5 years

 

 

 

4,695

 

6,155

 

Customer relationships

 

5 to 10 years

 

 

 

8,181

 

8,428

 

Backlog

 

0.75 to 2.25 years

 

 

 

354

 

4,972

 

 

 

 

 

Total

 

$

32,021

 

$

40,633

 

 

Amortization expense on intangible assets was $9,699, $6,580 and $342 for the years ended December 31, 2011, 2010 and 2009, respectively.  Estimated amortization expense for intangible assets as of December 31, 2011 is as follows:

 

For the Years Ending
December 31,

 

Estimated
Intangible
Amortization
Expense

 

2012

 

$

5,688

 

2013

 

4,664

 

2014

 

4,630

 

2015

 

3,554

 

2016

 

3.205

 

Thereafter

 

10,280

 

 

 

$

32,021