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Goodwill, Intangible Assets, and Servicing Assets (Tables) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | The following table provides information regarding the core deposit intangibles at June 30, 2019 and December 31, 2018:
|  |  |  |  |  | As of June 30, 2019 |  | As of December 31, 2018
Core Deposit Intangibles Related To: |  | Amortization Period |  | Gross Amount |  | Accumulated Amortization |  | Carrying Amount |  | Accumulated Amortization |  | Carrying Amount
|  |  |  | (Dollars in thousands)
Center Financial acquisition |  | 7 years |  | $ | 4,100 |  |  | $ | (4,100 | ) |  | $ | — |  |  | $ | (4,100 | ) |  | $ | — |
Pacific International Bank acquisition |  | 7 years |  | 604 |  |  | (590 | ) |  | 14 |  |  | (579 | ) |  | 25 |
Foster Bankshares acquisition |  | 10 years |  | 2,763 |  |  | (2,007 | ) |  | 756 |  |  | (1,893 | ) |  | 870 |
Wilshire Bancorp acquisition |  | 10 years |  | 18,138 |  |  | (5,961 | ) |  | 12,177 |  |  | (4,972 | ) |  | 13,166 |
Total |  |  |  | $ | 25,605 |  |  | $ | (12,658 | ) |  | $ | 12,947 |  |  | $ | (11,544 | ) |  | $ | 14,061 |
Schedule of Servicing Assets | The changes in servicing assets for the three and six months ended June 30, 2019 and 2018 were as follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
|  | (Dollars in thousands)
Balance at beginning of period |  | $ | 21,407 |  |  | $ | 24,866 |  |  | $ | 23,132 |  |  | $ | 24,710 |
Additions through originations of servicing assets |  | 619 |  |  | 1,600 |  |  | 946 |  |  | 3,316 |
Amortization |  | (2,029 | ) |  | (2,086 | ) |  | (4,081 | ) |  | (3,646 | )
Adjustments |  | — |  |  | 670 |  |  | — |  |  | 670 |
Balance at end of period |  | $ | 19,997 |  |  | $ | 25,050 |  |  | $ | 19,997 |  |  | $ | 25,050 |
Summary of Fair Value Inputs | The inputs used in evaluating servicing assets for impairment at June 30, 2019 and December 31, 2018 are presented below.
|  | June 30, 2019 |  | December 31, 2018
SBA Servicing Assets: |  |  |  |
Weighted-average discount rate |  | 10.98% |  | 11.23%
Constant prepayment rate |  | 13.40% |  | 11.09%
Mortgage Servicing Assets: |  |  |  |
Weighted-average discount rate |  | 9.25% |  | 10.25%
Constant prepayment rate |  | 9.86% |  | 7.13%

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746 + Details
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