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Mortgage Servicing Rights | 9 Months Ended
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Sep. 30, 2021
Transfers and Servicing [Abstract] |
Mortgage Servicing Rights | Mortgage Servicing Rights (In Thousands) The Company retains the right to service certain mortgage loans that it sells to secondary market investors. These mortgage servicing rights (“MSRs”) are recognized as a separate asset on the date the corresponding mortgage loan is sold. MSRs are amortized in proportion to and over the period of estimated net servicing income. These servicing rights are carried at the lower of amortized cost or fair value. Fair value is determined using an income approach with various assumptions, including expected cash flows, prepayment speeds, market discount rates, servicing costs, and other factors, and is subject to significant fluctuation as a result of actual prepayment speeds, default rates and losses differing from estimates thereof. For example, a decline in mortgage interest rates or an increase in actual prepayment speeds may cause negative adjustments to the valuation of the Company’s MSRs. Servicing rights are evaluated for impairment (or reversals of prior impairments) quarterly based upon the fair value of the rights as compared to the carrying amount. Impairment is recognized through a valuation allowance in the amount that unamortized cost exceeds fair value. If the Company later determines that all or a portion of the impairment no longer exists, a reduction of the valuation allowance may be recorded as an increase to income. Changes in valuation allowances related to servicing rights are reported in “Mortgage banking income” on the Consolidated Statements of Income. There was a positive valuation adjustment of $13,561 during the nine months ended September 30, 2021 on MSRs. This positive adjustment primarily arose from an increase in mortgage interest rates and a corresponding decrease in actual prepayment speeds. During the nine months ended September 30, 2020 there was a negative valuation adjustment of $13,694 which was caused by a difference between actual prepayment speeds and the Company’s assumptions with respect to prepayment speeds. Changes in the Company’s MSRs were as follows:
Balance at January 1, 2021 | $ | 62,994 |
Capitalization | 26,532 |
Amortization | (16,700) |
Valuation adjustment | 13,561 |
Balance at September 30, 2021 | $ | 86,387 |
Data and key economic assumptions related to the Company’s MSRs are as follows as of the dates presented:
| September 30, 2021 |  | December 31, 2020
Unpaid principal balance | $ | 8,470,973 |  |  | $ | 7,322,671 |
Weighted-average prepayment speed (CPR) | 11.68 | % |  | 15.05 | %
Estimated impact of a 10% increase | $ | (4,258) |  |  | $ | (4,001) |
Estimated impact of a 20% increase | (8,254) |  |  | (7,674) |
Discount rate | 9.83 | % |  | 9.86 | %
Estimated impact of a 10% increase | $ | (3,381) |  |  | $ | (2,144) |
Estimated impact of a 20% increase | (6,520) |  |  | (4,144) |
Weighted-average coupon interest rate | 3.33 | % |  | 3.58 | %
Weighted-average servicing fee (basis points) | 30.52 |  |  | 29.94 |
Weighted-average remaining maturity (in years) | 6.23 |  | 5.14
The Company recorded servicing fees of $4,891 and $3,400 for the three months ended September 30, 2021 and 2020, respectively, and servicing fees of $13,578 and $9,012 for the nine months ended September 30, 2021 and 2020, respectively, all of which are included in “Mortgage banking income” in the Consolidated Statements of Income.

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- Definition The entire disclosure for a transferor's continuing involvement in financial assets that it has transferred in a securitization or asset-backed financing arrangement, the nature of any restrictions on assets reported by an entity in its statement of financial position that relate to a transferred financial asset (including the carrying amounts of such assets), how servicing assets and servicing liabilities are reported, and (for securitization or asset-backed financing arrangements accounted for as sales) when a transferor has continuing involvement with the transferred financial assets and transfers of financial assets accounted for as secured borrowings, how the transfer of financial assets affects an entity's financial position, financial performance, and cash flows. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI 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