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Securities Owned and Sold, Not Yet Purchased (Tables)
12 Months Ended
Dec. 31, 2012
Securities Owned and Sold, Not Yet Purchased  
Summary of securities owned and sold, not yet purchased

  The following is a summary of securities owned and sold, not yet purchased at December 31 (dollars in thousands):

 
  Securities Owned   Securities Sold, Not Yet
Purchased
 
 
  2012   2011   2012   2011  

Corporate stocks—trading securities

  $ 5,438   $ 689   $ 5,249   $ 438  

Mutual funds

    4,648     4,588          
                   

Total

  $ 10,086   $ 5,277   $ 5,249   $ 438