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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2012
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]  
Goodwill and Intangible Assets Disclosure
GOODWILL AND OTHER INTANGIBLE ASSETS
The following table shows the changes in the carrying amount of goodwill for the years ended December 31:
 
2012
 
2011
Balance at beginning of year
$
447,743

 
$
434,699

Goodwill acquired
648

 
15,425

Foreign currency translation
3,960

 
(2,381
)
Balance at year end
$
452,351

 
$
447,743


Goodwill and indefinite-lived assets are reviewed for impairment on an annual basis in the fourth quarter. The Company completed its impairment review and determined that, through December 31, 2012, there had been no impairment of these assets.
The components of other intangible assets as of December 31 are as follows:
 
2012
 
2011
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Customer relationships
$
96,575

 
$
(21,928
)
 
$
95,203

 
$
(18,735
)
Proven technology and patents
42,960

 
(28,014
)
 
41,643

 
(25,174
)
Tradename (finite life)
3,972

 
(1,345
)
 
3,995

 
(1,072
)
Tradename (indefinite life)
25,061

 

 
25,033

 

Other
745

 
(462
)
 
743

 
(226
)
 
$
169,313

 
$
(51,749
)
 
$
166,617

 
$
(45,207
)

The Company recognized amortization expense associated with the above intangible assets of $7.2 million, $6.8 million and $6.2 million for the years ended December 31, 2012, 2011 and 2010, respectively. The annual aggregate amortization expense based on the current balance of other intangible assets is estimated at $6.0 million for 2013, $5.9 million for 2014, $5.2 million for 2015, $5.0 million for 2016 and $4.7 million for 2017. The finite-lived intangible assets are amortized on a straight-line basis over periods ranging from 3 to 45 years. The straight-line method of amortization reflects an appropriate allocation of the cost of the intangible assets to earnings in proportion to the amount of economic benefits obtained by the Company in each reporting period. Purchased intangibles amortization was $6.8 million ($4.5 million after tax), $6.2 million ($4.1 million after tax) and $5.7 million ($3.7 million after tax), for the years ended December 31, 2012, 2011 and 2010, respectively.
In addition to the above amortization, the Company recorded amortization expense associated with capitalized software of $13.9 million, $10.8 million and $8.6 million for the years ended December 31, 2012, 2011 and 2010, respectively.