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Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2011
Employee Benefit Plans  
Net Periodic Benefit Cost
    Three Months Ended     Six Months Ended  
          June 30,           June 30,  
(dollars in thousands)   2011     2010     2011     2010  
Interest cost $ 525   $ 497   $ 1,050   $ 994  
Expected return on plan assets   (676 )   (490 )   (1,352 )   (980 )
Recognized actuarial loss   689     401     1,378     802  
Settlement   391     0     604     0  
Net periodic benefit cost $ 929   $ 408   $ 1,680   $ 816