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Operating Segments (Tables)
6 Months Ended
Jun. 30, 2013
Segment Reporting [Abstract]  
Summary of Operating Results by Segment

Summarized operating results by segment were as follows:

 

     Banking      Frost  Wealth
Advisors
     Non-Banks     Consolidated  

Revenues from (expenses to) external customers:

          

Three months ended:

          

June 30, 2013

   $ 198,206       $ 28,259       $ (775   $ 225,690   

June 30, 2012

     193,634         26,598         (1,252     218,980   

Six months ended:

          

June 30, 2013

   $ 402,466       $ 55,482       $ (1,665   $ 456,283   

June 30, 2012

     389,907         52,595         (1,836     440,666   

Net income (loss):

          

Three months ended:

          

June 30, 2013

   $ 56,582       $ 4,263       $ (1,182   $ 59,663   

June 30, 2012

     55,984         4,228         (2,150     58,062   

Six months ended:

          

June 30, 2013

   $ 110,135       $ 7,501       $ (2,785   $ 114,851   

June 30, 2012

     114,274         7,619         (2,798     119,095