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MORTGAGE SERVICING RIGHTS (Tables)
6 Months Ended
Jun. 30, 2020
Transfers and Servicing [Abstract]  
Presentation of Activity Related to MSR
The following table presents activity related to MSRs for the three and six months ended June 30, 2020 and 2019:
 
 
Three Months Ended
 
Six Months Ended
 
June 30, 2020
 
June 30, 2019
 
June 30, 2020
 
June 30, 2019
 
(dollars in thousands)
Fair value, beginning of period
$
280,558

 
$
500,745

 
$
378,078

 
$
557,813

Change in fair value due to:
 
 
 
 
 
 
 
Changes in valuation inputs or assumptions (1)
(27,629
)
 
(55,749
)
 
(106,854
)
 
(98,838
)
Other changes, including realization of expected cash flows
(25,529
)
 
(19,668
)
 
(43,824
)
 
(33,647
)
Fair value, end of period
$
227,400

 
$
425,328

 
$
227,400

 
$
425,328

 
(1)     Principally represents changes in discount rates and prepayment speed inputs used in valuation model, primarily due to changes in interest rates.