Intangible Assets

12 Months Ended

Dec. 31, 2012

Note 9—Intangible Assets

At December 31, 2012 and 2011, intangible assets totaled $51,978 and $32,021, respectively, net of amortization. The December 31, 2012 balance includes the effect of four acquisitions during 2012 (See Note 4). The table below 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		2012		2011
Tradename	3 and 10 years		$	23,586	$	18,791
Non-compete agreements	2 to 5 years		4,130		4,695
Customer relationships	5 to 15 years		24,212		8,181
Backlog	0.75 years		50		354
		Total	$	51,978	$	32,021

Amortization expense of intangible assets was $6,543, $9,699 and $6,580 for the years ended December 31, 2012, 2011 and 2010, respectively. Estimated amortization expense for intangible assets as of December 31, 2012 is as follows:

For the Years Ending December 31,	Estimated Intangible Amortization Expense
2013	$	7,020
2014	6,986
2015	5,834
2016	5,330
2017	5,318
Thereafter	21,490
	$	51,978

- Definition

The entire disclosure for all or part of the information related to intangible assets.

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