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Capitalized Mortgage Servicing Rights | 12 Months Ended
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Dec. 31, 2022
Capitalized Mortgage Servicing Rights |
Capitalized Mortgage Servicing Rights | Note 5 — Capitalized Mortgage Servicing Rights Our capitalized MSRs reflect commercial real estate MSRs derived primarily from loans sold in our Agency Business or acquired MSRs. The weighted average estimated life remaining of our MSRs was 8.6 years and 8.5 years at December 31, 2022 and 2021, respectively. A summary of our capitalized MSR activity is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2022 | ​ | Year Ended December 31, 2021
​ |  | Originated |  | Acquired |  | Total |  | Originated |  | Acquired |  | Total
Beginning balance | ​ | $ | 395,573 | ​ | $ | 27,161 | ​ | $ | 422,734 | ​ | $ | 336,466 | ​ | $ | 43,508 | ​ | $ | 379,974
Additions | ​ | ​ | 83,115 | ​ | ​ | — | ​ | ​ | 83,115 | ​ | ​ | 134,116 | ​ | ​ | — | ​ | ​ | 134,116
Amortization | ​ | ​ | (53,449) | ​ | ​ | (6,427) | ​ | ​ | (59,876) | ​ | ​ | (47,845) | ​ | ​ | (10,770) | ​ | ​ | (58,615)
Write-downs and payoffs | ​ | ​ | (38,361) | ​ | ​ | (6,141) | ​ | ​ | (44,502) | ​ | ​ | (27,164) | ​ | ​ | (5,577) | ​ | ​ | (32,741)
Ending balance | ​ | $ | 386,878 | ​ | $ | 14,593 | ​ | $ | 401,471 | ​ | $ | 395,573 | ​ | $ | 27,161 | ​ | $ | 422,734
​ We collected prepayment fees totaling $48.2 million and $38.2 million during 2022 and 2021, respectively, which are included as a component of servicing revenue, net on the consolidated statements of income. At December 31, 2022 and 2021, we had no valuation allowance recorded on any of our MSRs. The expected amortization of capitalized MSRs recorded at December 31, 2022 is as follows (in thousands): ​
​ | ​ | ​ | ​
Year |  | Amortization
2023 |  | $ | 61,024
2024 |  | ​ | 59,025
2025 |  | ​ | 55,033
2026 |  | ​ | 49,121
2027 | ​ | ​ | 44,287
Thereafter |  | ​ | 132,981
Total | ​ | $ | 401,471
​ Based on scheduled maturities, actual amortization may vary from these estimates.

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