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Mortgage Servicing Rights (Tables)
 6 Months Ended
Jun. 30, 2016
Transfers and Servicing [Abstract]  
Changes in the Company's MSRs
Changes in the Company’s MSRs were as follows:
 
Balance at January 1, 2016
$
29,642

Sale of MSRs
(18,477
)
Capitalization
7,280

Amortization
(1,221
)
Impairment
(40
)
 
 
Balance at June 30, 2016
$
17,184
Data and key economic assumptions related to the Company's MSRs
Data and key economic assumptions related to the Company’s MSRs as of June 30, 2016 are as follows:
 
Unpaid principal balance
$
1,868,014

 
 
Weighted-average prepayment speed (CPR)
12.07
%
Estimated impact of a 10% increase
$
(784
)
Estimated impact of a 20% increase
(1,507
)
 
 
Discount rate
9.58
%
Estimated impact of a 10% increase
$
(615
)
Estimated impact of a 20% increase
(1,189
)
 
 
Weighted-average coupon interest rate
3.98
%
Weighted-average servicing fee (basis points)
25.57

Weighted-average remaining maturity (in years)
10.21