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Operating Segments (Tables)
9 Months Ended
Sep. 30, 2014
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:
 
 
 
 
 
 
 
September 30, 2014
$
226,166

 
$
32,662

 
$
12

 
$
258,840

September 30, 2013
201,374

 
28,790

 
(820
)
 
229,344

Nine months ended:
 
 
 
 
 
 
 
September 30, 2014
$
648,638

 
$
96,069

 
$
737

 
$
745,444

September 30, 2013
603,840

 
84,272

 
(2,485
)
 
685,627

Net income (loss):
 
 
 
 
 
 
 
Three months ended:
 
 
 
 
 
 
 
September 30, 2014
$
71,563

 
$
5,873

 
$
179

 
$
77,615

September 30, 2013
57,903

 
3,800

 
(1,259
)
 
60,444

Nine months ended:
 
 
 
 
 
 
 
September 30, 2014
$
191,491

 
$
16,345

 
$
(2,563
)
 
$
205,273

September 30, 2013
168,038

 
11,301

 
(4,044
)
 
175,295