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Principal Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2011
Principal Accounting Policies  
Calculation Of Numerator And Denominator In Earnings Per Share
(Dollars in thousands except per share data)
 
Three Months Ended
June 30,
   
Six Months Ended
June 30,
 
   
2011
   
2010
   
2011
   
2010
 
Numerator:
                       
Net income available to common
                       
 shareholders, as reported
  $ 29,422     $ 13,863     $ 36,344     $ 9,826  
                                 
Denominator:
                               
Weighted-average common shares outstanding
    55,413,243       51,665,047       55,227,528       50,506,809  
Stock options and nonvested stock
    722,822       697,360       711,802       677,894  
      56,136,065       52,362,407       55,939,330       51,184,703  
                                 
Diluted earnings per share
  $ 0.52     $ 0.26     $ 0.65     $ 0.19  
                                 
Antidilutive securities excluded from the
                               
computation of diluted EPS
    2,004,579       1,559,367       2,004,579       1,578,359