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MORTGAGE SERVICING RIGHTS
3 Months Ended
Mar. 31, 2018
Transfers and Servicing [Abstract]  
MORTGAGE SERVICING RIGHTS
MORTGAGE SERVICING RIGHTS
The Company invests in MSRs and has elected to carry them at fair value. The following table presents activity related to MSRs for the three months ended March 31, 2018 and 2017:
 
Three Months Ended
 
March 31, 2018
 
March 31, 2017
 
(dollars in thousands)
Fair value, beginning of period
$
580,860

 
$
652,216

Purchases

 
213

Change in fair value due to:
 

 
 
Changes in valuation inputs or assumptions (1)
36,674

 
(6,233
)
Other changes, including realization of expected cash flows
(21,156
)
 
(14,030
)
Fair value, end of period
$
596,378

 
$
632,166



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

For the three months ended March 31, 2018 and 2017, the Company recognized $28.5 million and $34.5 million, respectively, of net servicing income from MSRs in Other income (loss) in the Consolidated Statements of Comprehensive Income (Loss).