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Operating Segments
 6 Months Ended
Jun. 30, 2018
Segment Reporting [Abstract]  
Operating Segments
Operating Segments
We are managed under a matrix organizational structure whereby our two primary operating segments, Banking and Frost Wealth Advisors, overlap a regional reporting structure. See our 2017 Form 10-K for additional information regarding our operating segments. 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, 2018
$
290,433

 
$
34,526

 
$
(2,623
)
 
$
322,336

June 30, 2017
261,250

 
36,712

 
(2,094
)
 
295,868

Six months ended:
 
 
 
 
 
 
 
June 30, 2018
$
578,994

 
$
69,607

 
$
(5,072
)
 
$
643,529

June 30, 2017
520,161

 
71,300

 
(3,384
)
 
588,077

Net income (loss):
 
 
 
 
 
 
 
Three months ended:
 
 
 
 
 
 
 
June 30, 2018
$
109,276

 
$
5,901

 
$
(3,836
)
 
$
111,341

June 30, 2017
81,529

 
6,279

 
(2,255
)
 
85,553

Six months ended:
 
 
 
 
 
 
 
June 30, 2018
$
212,917

 
$
11,535

 
$
(6,631
)
 
$
217,821

June 30, 2017
162,398

 
11,573

 
(3,477
)
 
170,494