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Premises and Equipment (Tables)
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Summary of premises and equipment
A summary of premises and equipment follows:
 
 
December 31,
 
 
2015
 
2014
 
 
(In thousands)
Cost:
 
 
 
 
Land and land improvements
 
$
28,447

 
$
27,402

Buildings
 
120,370

 
110,380

Equipment
 
77,882

 
68,540

Total cost
 
226,699

 
206,322

Accumulated depreciation
 
(120,382
)
 
(108,826
)
Total premises and equipment
 
$
106,317

 
$
97,496