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Premises and Equipment
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Premises and Equipment
Premises and Equipment
The following table reflects the components of premises and equipment:
 
At December 31,
(Dollars in thousands)
2017
 
2016
Land and land improvements
$
15,402

 
$
15,656

Premises and improvements
54,643

 
54,239

Furniture and equipment
33,675

 
32,948

Total cost
103,720

 
102,843

Less: accumulated depreciation
(41,923
)
 
(39,205
)
Net book value
$
61,797

 
$
63,638


The following table summarizes rental expense charged to operations for the periods indicated:
 
For the Years Ended December 31,
(Dollars in thousands)
2017
 
2016
 
2015
Rental expense
$
3,938

 
$
3,791

 
$
3,167

Sublease rental income
(227
)
 
(138
)
 
(195
)
Net rental expense
$
3,711

 
$
3,653

 
$
2,972