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Servicing Rights (Tables)
 12 Months Ended
Dec. 31, 2017
Transfers and Servicing [Abstract]  
Summary of Activity for Servicing Assets
The following table summarizes the activity related to the fair value of our servicing assets for the year ended December 31:
 
2017
 
2016
Fair value at the beginning of period
$
1,131

 
$
3,489

Addition:
 
 
 
Servicing resulting from transfers of financial assets
1,120

 
2,690

Changes in fair value:
 
 
 
Change in inputs or assumptions used in the valuation model
—

 
—

Other changes in fair value (1)
(2,097
)
 
(5,048
)
Fair value at the end of period (Level 3)
$
154

 
$
1,131

  ___________
(1) Represents changes due to collection of expected cash flows through December 31, 2017 and 2016.