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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2012
Income Taxes [Abstract]  
Summary Of Differences In Taxes From Continuing Operations
  Three Months Ended
  March 31,
(dollars in thousands) 2012 2011
Provision at statutory rate of 35% $ 10,522   $ 7,333  
Tax-exempt income   (2,510 )   (2,390 )
State income taxes   894     394  
Interim period effective rate adjustment   17     (796 )
Other, net   (583 )   (23 )
Income tax expense $ 8,340   $ 4,518  
Effective tax rate   27.7  %   21.6 %
Summary Of Reconciliation Of Unrecognized Tax Benefits
(dollars in thousands)   2012   2011
Balance at January 1 $ 4,145 $ 4,553
Additions (reductions) based on tax positions related to the current year   0   2
Balance at March 31 $ 4,145 $ 4,555