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Residential Mortgage Servicing Rights (Tables)
 12 Months Ended
Dec. 31, 2015
Transfers and Servicing [Abstract]  
Schedule Of Changes In Mortgage Servicing Rights
The following table presents the changes in the Company's residential mortgage servicing rights ("MSR") for the years ended December 31, 2015, 2014 and 2013: 

(in thousands) 
2015
 
2014
 
2013
Balance, beginning of period
$
117,259

 
$
47,765

 
$
27,428

Acquired/purchased MSR
—

 
62,770

 
—

Additions for new MSR capitalized
35,284

 
23,311

 
17,963

Changes in fair value:
 
 
 
 
 
 Due to changes in model inputs or assumptions(1)
(380
)
 
(5,757
)
 
5,688

 Other(2)
(20,346
)
 
(10,830
)
 
(3,314
)
Balance, end of period
$
131,817

 
$
117,259

 
$
47,765

 
(1)
Principally reflects changes in discount rates and prepayment speed assumptions, which are primarily affected by changes in interest rates. 
(2)
Represents changes due to collection/realization of expected cash flows over time.
Schedule Of Other Information Servicing Loan Portfolio
Information related to our serviced loan portfolio as of December 31, 2015, 2014 and 2013 is as follows: 
(dollars in thousands)
December 31, 2015
 
December 31, 2014
 
December 31, 2013
Balance of loans serviced for others
$
13,047,266

 
$
11,590,310

 
$
4,362,499

MSR as a percentage of serviced loans
1.01
%
 
1.01
%
 
1.09
%
Key Assumptions Used In Measuring The Fair Value of MSR
Key assumptions used in measuring the fair value of MSR as of December 31 were as follows:
 
2015
 
2014
 
2013
Constant prepayment rate
11.70
%
 
12.39
%
 
12.74
%
Discount rate
9.68
%
 
9.17
%
 
8.69
%
Weighted average life (years)
6.5

 
6.4

 
6.0
Sensitivity Analysis of Current Fair Value to Changes in Discount and Prepayment Speed Assumptions
A sensitivity analysis of the current fair value to changes in discount and prepayment speed assumptions as of December 31, 2015 and December 31, 2014 is as follows:
 
December 31, 2015
 
December 31, 2014
Constant prepayment rate
 
 
 
Effect on fair value of a 10% adverse change
$
(5,337
)
 
$
(4,965
)
Effect on fair value of a 20% adverse change
$
(10,283
)
 
$
(9,547
)
 
 
 
 
Discount rate
 
 
 
Effect on fair value of a 100 basis point adverse change
$
(4,936
)
 
$
(4,539
)
Effect on fair value of a 200 basis point adverse change
$
(9,494
)
 
$
(8,771
)