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Mortgage Servicing Rights (Tables)
 12 Months Ended
Dec. 31, 2015
Transfers and Servicing of Financial Assets [Abstract]  
Schedule of changes in carrying value of mortgage servicing rights and associated valuation allowance
The following table shows changes in the carrying value of MSRs and the associated valuation allowance.
(Dollars in thousands)
 
2015
 
2014
Mortgage servicing rights:
 
 

 
 

Balance at beginning of year
 
$
4,733

 
$
4,844

Additions
 
1,299

 
1,167

Amortization
 
(1,424
)
 
(1,278
)
Sales
 
—

 
—

Carrying value before valuation allowance at end of year
 
4,608

 
4,733

Valuation allowance:
 
 

 
 

Balance at beginning of year
 
—

 
—

Impairment recoveries
 
—

 
—

Balance at end of year
 
$
—

 
$
—

Net carrying value of mortgage servicing rights at end of year
 
$
4,608

 
$
4,733

Fair value of mortgage servicing rights at end of year
 
$
7,246

 
$
6,979