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Mortgage Servicing Rights (Tables)
3 Months Ended
Mar. 31, 2015
Transfers and Servicing [Abstract]  
Summary of Changes in 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
 
2015
 
2014
 
(in thousands)
Amortized cost:
 
 
 
Balance at beginning of period
$
42,148

 
$
42,452

Originations of mortgage servicing rights
1,557

 
1,115

Amortization
(1,902
)
 
(1,899
)
Balance at end of period
$
41,803

 
$
41,668