Premises and equipment (Tables)
 12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Schedule of premises and equipment
Premises and equipment at December 31, 2014 and 2013 consisted of the following (dollars in thousands):
 
2014
 
2013
Land
$
10,501

 
$
8,886

Buildings and leasehold improvements
39,251

 
30,700

Furniture and equipment
15,848

 
15,414

 
65,600

 
55,000

Less accumulated depreciation and amortization
(21,951
)
 
(22,047
)
Premises and equipment, net
$
43,649

 
$
32,953