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Loan Servicing | 12 Months Ended
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Dec. 31, 2022
Loan Servicing |
Loan Servicing | NOTE 9 Loan Servicing Loans serviced for others are not included in the accompanying consolidated balance sheets. The unpaid principal balances of loans serviced for others totaled $357.2 million and $345.8 million at December 31, 2022 and 2021, respectively. Servicing loans for others generally consists of collecting mortgage payments, maintaining escrow accounts, disbursing payments to investors and collection and foreclosure processing. Loan servicing income is recorded on an accrual basis and includes servicing fees from investors and certain charges collected from borrowers, such as late payment fees, and is net of fair value adjustments to capitalized mortgage servicing rights. The following table summarizes the Company’s activity related to servicing rights for the years ended December 31, 2022, 2021, and 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended
​ | ​ | December 31,
(dollars in thousands) |  | 2022 |  | 2021 |  | 2020
Balance, beginning of period | ​ | $ | 1,880 | ​ | $ | 1,987 | ​ | $ | 3,845
Additions | ​ |  | 622 | ​ |  | 225 | ​ | ​ | 178
Amortization | ​ |  | (524) | ​ |  | (745) | ​ | ​ | (922)
(Impairment)/Recovery | ​ |  | 665 | ​ |  | 413 | ​ | ​ | (1,114)
Balance, end of period | ​ | $ | 2,643 | ​ | $ | 1,880 | ​ | $ | 1,987
​ The following is a summary of key data and assumptions used in the valuation of servicing rights as of December 31, 2022 and 2021. Increases or decreases in any one of these assumptions would result in lower or higher fair value measurements. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31, |
(dollars in thousands) | ​ | 2022 | ​ | 2021 | ​
Fair value of servicing rights | ​ | $ | 2,643 | ​ | $ | 1,880 | ​
Weighted-average remaining term, years | ​ |  | 20.5 | ​ |  | 20.3 | ​
Prepayment speeds | ​ |  | 6.9 | % |  | 14.2 | %
Discount rate | ​ |  | 10.5 | % |  | 9.5 | %
​

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- Definition The entire disclosure of servicing assets. + References No definition available. + Details
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Namespace Prefix: | alrs_
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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