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Mortgage Servicing Assets (Tables)
 12 Months Ended
Dec. 31, 2013
Transfers and Servicing of Financial Assets [Abstract]  
Schedule of changes in carrying value of mortgage servicing assets and associated valuation allowance
The following table shows changes in the carrying value of mortgage servicing assets and the associated valuation allowance:
(Dollars in thousands)
 
2013
 
2012
Mortgage servicing assets:
 
 

 
 

Balance at beginning of year
 
$
4,645

 
$
5,610

Additions
 
1,770

 
1,956

Amortization
 
(1,571
)
 
(2,921
)
Sales
 
—

 
—

Carrying value before valuation allowance at end of year
 
4,844

 
4,645

Valuation allowance:
 
 

 
 

Balance at beginning of year
 
—

 
(238
)
Impairment recoveries
 
—

 
238

Balance at end of year
 
$
—

 
$
—

Net carrying value of mortgage servicing assets at end of year
 
$
4,844

 
$
4,645

Fair value of mortgage servicing assets at end of year
 
$
8,127

 
$
5,760