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Premises and Equipment (Tables)
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Summary of premises and equipment
The following table summarizes premises and equipment:
 
 
December 31,
(Dollars in thousands)
 
2016
 
2015
Land and land improvements
 
$
36,185

 
$
28,447

Buildings
 
144,155

 
120,370

Furniture and equipment
 
91,963

 
77,882

Total
 
272,303

 
226,699

Less accumulated depreciation
 
(127,291
)
 
(120,382
)
Premises and equipment, net
 
$
145,012

 
$
106,317