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Goodwill and Other Intangible Assets
9 Months Ended
Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets

Goodwill

Goodwill totaled $460.0 million at September 30, 2012December 31, 2011 and September 30, 2011. Goodwill is not amortized but is evaluated for impairment on an annual basis at November 30th of each year or whenever events or changes in circumstances indicate the carrying value may not be recoverable. No events or changes in circumstances since the November 30, 2011 annual impairment test were noted that would indicate it was more likely than not a goodwill impairment exists.

Other Intangible Assets

The following tables show the gross carrying amount and the amount of accumulated amortization of intangible assets subject to amortization.
 
September 30, 2012
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
Core deposit intangibles
$
16,759

 
$
(10,117
)
 
$
6,642

Non-compete covenant
102

 
(70
)
 
32

Lease intangible
618

 
(475
)
 
143

 
$
17,479

 
$
(10,662
)
 
$
6,817

 
 
December 31, 2011
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
Core deposit intangibles
$
16,759

 
$
(8,829
)
 
$
7,930

Non-compete covenant
102

 
(51
)
 
51

Lease intangible
618

 
(360
)
 
258

 
$
17,479

 
$
(9,240
)
 
$
8,239

 
 
September 30, 2011
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
Core deposit intangibles
$
16,760

 
$
(8,339
)
 
$
8,421

Non-compete covenant
102

 
(45
)
 
57

Lease intangible
617

 
(313
)
 
304

 
$
17,479

 
$
(8,697
)
 
$
8,782



Intangible asset amortization expense was $0.5 million in each of the three months ended September 30, 2012 and 2011. Estimated amortization expense for each of the next five years is as follows: 2012 - $0.4 million; 2013 - $1.2 million; 2014 - $1.1 million; 2015 - $1.0 million; and 2016 - $0.9 million.