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21) Mortgage Servicing Rightss (Tables) | 12 Months Ended
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Dec. 31, 2020
Table Text Block Supplement [Abstract] |
Schedule of Mortgage Servicing Rights | The following table presents the MSR activity for the periods presented.
| December 31
| 2020 | 2019
Amortized cost: |  |
Balance before valuation allowance at beginning of year | $ 17,155,529 | $ 20,016,822
MSR additions resulting from loan sales | 29,896,465 | 4,194,502
Amortization (1) | (11,841,478) | (7,055,795)
Application of valuation allowance to write down MSRs with other than temporary impairment | - | -
Balance before valuation allowance at year end | $ 35,210,516 | $ 17,155,529
Valuation allowance for impairment of MSRs: |  |
Balance at beginning of year | $ - | $ -
Additions | - | -
Application of valuation allowance to write down MSRs with other than temporary impairment | - | -
Balance at year end | $ - | $ -
Mortgage servicing rights, net | $ 35,210,516 | $ 17,155,529
Estimated fair value of MSRs at year end | $ 38,702,358 | $ 22,784,571
(1) Included in other expenses on the consolidated statements of earnings
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense, Mortgage Servicing Rights | Therefore, the following estimates will change in a manner and amount not presently determinable by management.
|  | Estimated MSR Amortization
2021 |  | $ 4,724,439
2022 |  | 3,582,811
2023 |  | 3,030,850
2024 |  | 2,574,323
2025 |  | 2,200,840
Thereafter |  | 19,097,253
Total |  | $ 35,210,516
Schedule of Other Revenues | During the years ended December 31, 2020 and 2019, the Company collected the following contractual servicing fee income and late fee income as reported in other revenues on the consolidated statements of earnings:
| 2020 |  | 2019
Contractual servicing fees | $ 8,940,612 |  | $ 7,212,164
Late fees | 305,962 |  | 365,477
Total | $ 9,246,574 |  | $ 7,577,641
Summary of Unpaid Principal Balances of the Servicing Portfolio | The following is a summary of the unpaid principal balances (“UPB”) of the servicing portfolio for the periods presented:
| Years Ended December 31
| 2020 |  | 2019 |
Servicing UPB | $ 5,070,287,864 |  | $ 2,804,139,415 |
Assumptions used in determining MSR value | The following key assumptions were used in determining MSR value:
| Prepayment Speeds | Average Life(Years) | Discount Rate
December 31, 2020 | 15.60 | 5.30 | 9.50
December 31, 2019 | 15.30 | 5.27 | 9.51

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