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Note 8 - Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Text Block]
8.      GOODWILL AND OTHER INTANGIBLE ASSETS

The following table presents changes in the carrying amount of goodwill for the three-year period ended December 31, 2012.

Changes in the Carrying Amount of Goodwill

(Dollar amounts in thousands)

Balance at January 1, 2010
  $ 262,886  
Goodwill acquired through FDIC-assisted transaction
    7,941  
Balance at December 31, 2010
    270,827  
Adjustment to goodwill recorded in 2010 (1)
    (5,350 )
Adjusted balance at January 1, 2011
    265,477  
2011 activity
    -  
Balance at December 31, 2011
    265,477  
2012 activity
    -  
Balance at December 31, 2012
  $ 265,477  

(1)
Goodwill was adjusted based on additional information received in 2011 relating to the acquisition date value of certain assets and liabilities.

The Company’s annual goodwill impairment test was performed as of October 1, 2012. It was determined that no impairment existed as of that date. For a discussion of the accounting policies for goodwill and other intangible assets, refer to Note 1, Summary of Significant Accounting Policies.”

The Company’s other intangible assets are core deposit premiums, which are being amortized over their estimated useful lives. The Company’s annual impairment testing was performed as of November 30, 2012 by comparing the carrying value of intangibles with our anticipated discounted future cash flows, and it was determined that no impairment existed as of that date.

Core Deposit Intangibles

(Dollar amounts in thousands)

   
Years Ended December 31,
 
   
2012
   
2011
   
2010
 
   
Gross
   
Accumulated Amortization
   
Net
   
Gross
   
Accumulated Amortization
   
Net
   
Gross
   
Accumulated Amortization
   
Net
 
Balance at the beginning of the year
  $ 34,318     $ 16,145       $18,173       $ 42,832     $ 22,276       $20,556       $ 36,591     $ 17,998       $18,593    
Additions
    781       -       781         1,419       -       1,419         6,242       -       6,242    
Amortization expense
    -       3,372       (3,372)         -       3,802       (3,802)         -       4,279       (4,279)    
Fully amortized assets
    (1,324 )     (1,324 )     -         (9,933 )     (9,933 )     -         (1 )     (1 )     -    
Balance at the end of the year
  $ 33,775     $ 18,193       $15,582       $ 34,318     $ 16,145       $18,173       $ 42,832     $ 22,276       $20,556    
Weighted-average remaining life (in years)
                    6.4                         6.9                         7.3    
Estimated useful lives (in years)                   3.3 to 12.8                       3.3 to  12.6                      3.3 to  12.6   

Scheduled Amortization of Other Intangible Assets

(Dollar amounts in thousands)

   
Total
 
Year ending December 31,
     
2013
  $ 3,278  
2014
    2,689  
2015
    2,500  
2016
    2,424  
2017
    1,643  
2018 and thereafter
    3,048  
Total
  $ 15,582