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Goodwill and Acquired Intangible Assets, Net
3 Months Ended
Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND ACQUIRED INTANGIBLE ASSETS, NET
GOODWILL AND ACQUIRED INTANGIBLE ASSETS, NET
A summary of acquired intangible assets and goodwill activity for the three-month period ended March 31, 2012 is presented below:
  (in thousands)
 
Acquired
Intangible
Assets
 
Goodwill
 
Total
Intangible
Assets
Balance as of December 31, 2011
 
$
99,878

 
$
488,628

 
$
588,506

Increases (decreases):
 
 
 
 
 
 
Acquisitions
 
2,735

 
5,869

 
8,604

Amortization
 
(5,872
)
 

 
(5,872
)
Other (primarily changes in foreign currency exchange rates)
 
1,561

 
10,326

 
11,887

Balance as of March 31, 2012
 
$
98,302

 
$
504,823

 
$
603,125



Estimated annual amortization expense on intangible assets with finite lives, before income taxes, as of March 31, 2012, is expected to total $22.7 million for 2012, $18.1 million for 2013, $15.3 million for 2014, $10.0 million for 2015, $8.5 million for 2016 and $7.0 million for 2017.
The Company’s annual goodwill impairment test is performed during the fourth quarter. The Company’s annual impairment test for the year ended December 31, 2011 resulted in no impairment charges. Determining the fair value of reporting units requires significant management judgment in estimating future cash flows and assessing potential market and economic conditions. It is reasonably possible that the Company’s operations will not perform as expected, or that estimates or assumptions could change, which may result in the Company recording material non-cash impairment charges during the year in which these changes take place.