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Mortgage Servicing Rights
3 Months Ended
Mar. 31, 2016
Transfers and Servicing [Abstract]  
Mortgage Servicing Rights
Mortgage Servicing Rights
(In Thousands)
The Company retains the right to service certain mortgage loans that it sells to secondary market investors. These mortgage servicing rights (“MSRs”), included in “Other assets” on the Consolidated Balance Sheets, are recognized as a separate asset on the date the corresponding mortgage loan is sold. MSRs are amortized in proportion to and over the period of estimated net servicing income. These servicing rights are carried at the lower of amortized cost or fair market value. Fair market value is determined using an income approach with various assumptions including expected cash flows, prepayment speeds, market discount rates, servicing costs, and other factors. Impairment losses on MSRs are recognized to the extent by which the unamortized cost exceeds fair value. No impairment losses on MSRs were recognized in earnings for the three months ended March 31, 2016 or 2015. During the first quarter of 2016, the Company sold MSRs relating to the mortgage loans having an aggregate unpaid principal balance totaling $1,830,444 to a third party for net proceeds of $18,508. There were no sales of MSRs in the first quarter of 2015.
Changes in the Company’s mortgage servicing rights were as follows:
 
Balance at January 1, 2016
$
29,642

Sale of MSRs
(18,477
)
Capitalization
2,869

Amortization
(668
)
 
 
Balance at March 31, 2016
$
13,366



Data and key economic assumptions related to the Company’s mortgage servicing rights as of March 31, 2016 are as follows:
 
Unpaid principal balance
$
1,433,010

 
 
Weighted-average prepayment speed (CPR)
11.01
%
Estimated impact of a 10% increase
$
(591
)
Estimated impact of a 20% increase
(1,138
)
 
 
Discount rate
9.53
%
Estimated impact of a 10% increase
$
(505
)
Estimated impact of a 20% increase
(975
)
 
 
Weighted-average coupon interest rate
4.04
%
Weighted-average servicing fee (basis points)
25.16

Weighted-average remaining maturity (in years)
10.09