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Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details) $ in Thousands | Sep. 30, 2023 USD ($)
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Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | $ 1,508
Allowance for credit loss, collateral dependent loans | 577
Commercial |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 572
Allowance for credit loss, collateral dependent loans | 572
Consumer |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 936
Allowance for credit loss, collateral dependent loans | 5
Consumer | Real estate first mortgage |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 886
Allowance for credit loss, collateral dependent loans | 3
Consumer | Real estate junior lien |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 46
Consumer | Other revolving and installment |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 4
Allowance for credit loss, collateral dependent loans | 2
Real Estate |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 1,504
Real Estate | Commercial |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 572
Real Estate | Consumer |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 932
Real Estate | Consumer | Real estate first mortgage |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 886
Real Estate | Consumer | Real estate junior lien |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 46
Other |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 4
Other | Consumer |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 4
Other | Consumer | Other revolving and installment |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | $ 4

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- Definition The amount of allowance for credit loss on collateral dependent financing receivables. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of amortized cost basis of collateral dependent financing receivables. + References No definition available. + Details
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Namespace Prefix: | alrs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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