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Mortgage Servicing Rights (Tables)
9 Months Ended
Sep. 30, 2013
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
September 30
 
Nine months ended
September 30
 
2013
 
2012
 
2013
 
2012
 
(in thousands)
Amortized cost:
 
 
 
 
 
 
 
Balance at beginning of period
$
41,750

 
$
37,003

 
$
39,737

 
$
34,666

Originations of mortgage servicing rights
2,909

 
4,341

 
10,371

 
11,177

Amortization
(2,031
)
 
(2,711
)
 
(7,480
)
 
(7,210
)
Balance at end of period
$
42,628

 
$
38,633

 
$
42,628

 
$
38,633

 
 
 
 
 
 
 
 
Valuation allowance:
 
 
 
 
 
 
 
Balance at beginning of period
$
(1,690
)
 
$
(1,550
)
 
$
(3,680
)
 
$
(1,550
)
Reversals (additions)
1,690

 
(2,130
)
 
3,680

 
(2,130
)
Balance at end of period
$

 
$
(3,680
)
 
$

 
$
(3,680
)
 
 
 
 
 
 
 
 
Net MSRs at end of period
$
42,628

 
34,953

 
$
42,628

 
$
34,953