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Mortgage Servicing Rights
3 Months Ended
Mar. 31, 2014
Transfers and Servicing [Abstract]  
Mortgage Servicing Rights
Mortgage Servicing Rights
The following table summarizes the changes in mortgage servicing rights (MSRs), which are included in other assets on the consolidated balance sheets:
 
Three months ended
March 31
 
2014
 
2013
 
(in thousands)
Amortized cost:
 
 
 
Balance at beginning of period
$
42,452

 
$
39,737

Originations of mortgage servicing rights
1,115

 
4,227

Amortization
(1,899
)
 
(2,958
)
Balance at end of period
$
41,668

 
$
41,006

 
 
 
 
Valuation allowance
$

 
$
(3,680
)
 
 
 
 
Net MSRs at end of period
$
41,668

 
37,326


MSRs represent the economic value of existing contractual rights to service mortgage loans that have been sold. Accordingly, actual and expected prepayments of the underlying mortgage loans can impact the value of MSRs.
The Corporation estimates the fair value of its MSRs by discounting the estimated cash flows from servicing income, net of expense, over the expected life of the underlying loans at a discount rate commensurate with the risk associated with these assets. Expected life is based on the contractual terms of the loans, as adjusted for prepayment projections.
As of March 31, 2014, the estimated fair value of MSRs was $48.2 million, which exceeded their book value. Therefore, no increase to the valuation allowance was necessary during the three months ended March 31, 2014.