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Goodwill and Other Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2011
Goodwill and Other Intangible Assets  
Schedule of Intangible Assets with Estimable Useful Lives
                                                                 
    June 30, 2011     December 31, 2010  
    Gross                             Gross                    
    Carrying     Accumulated     Valuation     Net     Carrying     Accumulated     Valuation     Net  
(In thousands)   Amount     Amortization     Allowance     Amount     Amount     Amortization     Allowance     Amount  
 
Amortizable intangible assets:
                                                               
Core deposit premium
  $ 25,720     $ (17,521 )   $     $ 8,199     $ 25,720     $ (16,108 )   $     $ 9,612  
Mortgage servicing rights
    3,092       (1,723 )     (174 )     1,195       3,082       (1,572 )     (185 )     1,325  
 
Total
  $ 28,812     $ (19,244 )   $ (174 )   $ 9,394     $ 28,802     $ (17,680 )   $ (185 )   $ 10,937  
 
Schedule of Estimated Annual Amortization Expense for Next Five Years
         
(In thousands)        
 
2011
  $ 2,870  
2012
    2,331  
2013
    1,795  
2014
    1,315  
2015
    967  
 
Schedule of Changes in Carrying Amount of Goodwill and Net Other Intangible Assets
                         
                    Mortgage  
            Core Deposit     Servicing  
(In thousands)   Goodwill     Premium     Rights  
 
Balance at January 1, 2011
  $ 125,585     $ 9,612     $ 1,325  
Originations
                10  
Amortization
          (1,413 )     (151 )
Impairment reversal
                11  
 
Balance at June 30, 2011
  $ 125,585     $ 8,199     $ 1,195  
 
Schedule of Goodwill Allocated by Operating Segments
         
(In thousands)        
 
Consumer segment
  $ 67,765  
Commercial segment
    57,074  
Wealth segment
    746  
 
Total goodwill
  $ 125,585