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Servicing Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Transfers and Servicing [Abstract] |
Servicing Asset at Amortized Cost | The changes in net servicing assets for the year ended December 31, 2018 and 2017 were as follows:
| Year Ended December 31,
| 2018 |  | 2017
| (Dollars in thousands)
Balance at beginning of period | $ | 24,710 |  |  | $ | 26,457 |
Additions through originations of servicing assets | 6,157 |  |  | 5,492 |
Amortization | (7,735 | ) |  | (7,239 | )
Balance at end of period | $ | 23,132 |  |  | $ | 24,710 |
Schedule of Servicing Assets at Fair Value | Total servicing assets at December 31, 2018 totaled $23.1 million and was comprised of $18.7 million in SBA servicing assets and $4.4 million in mortgage related servicing assets. At December 31, 2017, servicing assets totaled $24.7 million, comprised of $22.2 million in SBA servicing assets and $2.5 million in mortgage related servicing assets. The Company utilizes the discounted cash flow method to calculate the initial excess servicing assets. The inputs used in determining the fair value of the servicing assets at December 31, 2018 and December 31, 2017 are presented below.
|  | December 31, 2018 |  | December 31, 2017
|  | Range |  | Range
SBA Servicing Assets: |  |  |  |
Weighted-average discount rate |  | 10.42% ~ 11.52% |  | 10.13% ~ 11.13%
Constant prepayment rate |  | 9.51% ~ 11.09% |  | 7.50% ~ 12.50%
Mortgage Servicing Assets: |  |  |  |
Weighted-average discount rate |  | 10.13% ~ 10.38% |  | 9.50% ~ 9.66%
Constant prepayment rate |  | 6.51% ~ 7.69% |  | 7.71% ~ 9.13%

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746 + Details
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- Definition Tabular disclosure of the activity in the balance of servicing assets (including a description of where changes in fair value are reported in the statement of income for each period for which results of operations are presented), including but not limited to, the following: beginning and ending balances, additions (for instance, through purchases of servicing assets), disposals, changes in fair value during the period resulting from changes in inputs or assumptions used in the valuation model, other changes in fair value along with a description of those changes, and other changes that affect the balance along with a description of those changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746 + Details
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- References No definition available. + Details
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