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Goodwill, Intangible Assets, and Servicing Assets (Tables)
3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets The following table provides information regarding the core deposit intangibles at March 31, 2021 and December 31, 2020:
  As of March 31, 2021As of December 31, 2020
Core Deposit Intangibles Related To:Amortization PeriodGross
Amount
Accumulated
Amortization
Carrying AmountAccumulated
Amortization
Carrying Amount
 (Dollars in thousands)
Foster Bankshares acquisition10 years$2,763 $(2,368)$395 $(2,322)$441 
Wilshire Bancorp acquisition10 years18,138 (9,335)8,803 (8,871)9,267 
Total$20,901 $(11,703)$9,198 $(11,193)$9,708 
Schedule of Servicing Assets
The changes in servicing assets for the three months ended March 31, 2021 and 2020 were as follows:
Three Months Ended March 31,
20212020
(Dollars in thousands)
Balance at beginning of period$12,692 $16,417 
Additions through originations of servicing assets592 377 
Amortization(1,200)(1,947)
Balance at end of period$12,084 $14,847 
Summary of Fair Value Inputs The inputs used in evaluating servicing assets for impairment at March 31, 2021 and December 31, 2020 are presented below.
March 31, 2021December 31, 2020
SBA Servicing Assets:
Weighted-average discount rate10.74%9.93%
Constant prepayment rate14.39%14.40%
Mortgage Servicing Assets:
Weighted-average discount rate8.75%8.26%
Constant prepayment rate8.74%8.63%