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Mortgage Servicing Rights (Tables)
12 Months Ended
Dec. 31, 2012
Transfers and Servicing [Abstract]  
Summary of Changes in Mortgage Servicing Rights
The following table summarizes the changes in MSRs, which are included in other assets on the consolidated balance sheets:
 
2012
 
2011
 
(in thousands)
Amortized cost:
 
 
 
Balance at beginning of year
$
34,666

 
$
30,700

Originations of mortgage servicing rights
15,451

 
9,884

Amortization expense
(10,380
)
 
(5,918
)
Balance at end of year
$
39,737

 
$
34,666

Valuation allowance:
 
 
 
Balance at beginning of year
$
(1,550
)
 
$
(1,550
)
Additions
(2,130
)
 

Balance at end of year
$
(3,680
)
 
$
(1,550
)
Net MSRs at end of year
$
36,057

 
$
33,116

Schedule Of Servicing Assets Expected Amortization Expense
Estimated MSR amortization expense for the next five years, based on balances as of December 31, 2012 and the contractual remaining lives of the underlying loans, follows (in thousands):
Year
 
2013
$
8,518

2014
7,694

2015
6,782

2016
5,777

2017
4,673