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Mortgage Servicing Rights (Tables)
 3 Months Ended
Mar. 31, 2016
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.
 
 
Three Months Ended 
 March 31,
(Dollars in thousands)
 
2016
 
2015
Mortgage servicing rights:
 
 

 
 

Balance at beginning of period
 
$
4,608

 
$
4,733

Additions
 
205

 
250

Amortization
 
(332
)
 
(393
)
Sales
 
—

 
—

Carrying value before valuation allowance at end of period
 
4,481

 
4,590

Valuation allowance:
 
 

 
 

Balance at beginning of period
 
—

 
—

Impairment recoveries
 
—

 
—

Balance at end of period
 
$
—

 
$
—

Net carrying value of mortgage servicing rights at end of period
 
$
4,481

 
$
4,590

Fair value of mortgage servicing rights at end of period
 
$
6,353

 
$
6,654