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Other Comprehensive Income (Tables)
6 Months Ended
Jun. 30, 2011
Other Comprehensive Income  
Schedule of Calculation of Other Comprehensive Income
                                 
    For the     For the  
    Three Months     Six Months  
    Ended June 30     Ended June 30  
 
(In thousands)   2011     2010     2011     2010  
 
Available for sale debt securities for which a portion of OTTI has been recorded in earnings:
                               
Unrealized holding gains (losses) subsequent to initial OTTI recognition
  $ (812 )   $ 5,665     $ 5,663     $ 11,967  
Income tax (expense) benefit
    309       (2,153 )     (2,152 )     (4,547 )
 
Net unrealized gains (losses)
    (503 )     3,512       3,511       7,420  
 
Other available for sale investment securities:
                               
Unrealized holding gains
    35,540       23,693       25,135       36,073  
Reclassification adjustment for gains included in net income
    (1 )     (1,362 )     (177 )     (1,770 )
 
Net unrealized gains on securities
    35,539       22,331       24,958       34,303  
Income tax expense
    (13,505 )     (8,486 )     (9,484 )     (13,036 )
 
Net unrealized gains
    22,034       13,845       15,474       21,267  
 
Prepaid pension cost:
                               
Amortization of accumulated pension loss
    540       567       1,080       1,134  
Income tax expense
    (205 )     (215 )     (410 )     (431 )
 
Pension loss amortization
    335       352       670       703  
 
Other comprehensive income
  $ 21,866     $ 17,709     $ 19,655     $ 29,390