XML 76 R66.htm IDEA: XBRL DOCUMENT
v3.23.2

Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details) $ in Thousands | Jun. 30, 2023 USD ($)
--- | ---
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | $ 993
Allowance for credit loss, collateral dependent loans | 79
Commercial |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 188
Allowance for credit loss, collateral dependent loans | 68
Commercial | Commercial and industrial |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 188
Allowance for credit loss, collateral dependent loans | 68
Consumer |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 805
Allowance for credit loss, collateral dependent loans | 11
Consumer | Real estate first mortgage |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 299
Allowance for credit loss, collateral dependent loans | 5
Consumer | Real estate junior lien |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 500
Consumer | Other revolving and installment |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 6
Allowance for credit loss, collateral dependent loans | 6
Real Estate |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 799
Real Estate | Consumer |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 799
Real Estate | Consumer | Real estate first mortgage |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 299
Real Estate | Consumer | Real estate junior lien |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 500
Equipment |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 188
Equipment | Commercial |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 188
Equipment | Commercial | Commercial and industrial |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 188
Other |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 6
Other | Consumer |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | 6
Other | Consumer | Other revolving and installment |
Loans and Allowance for Loan Losses |
Amortized costs, collateral dependent loans | $ 6

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

X
- Definition The amount of amortized cost basis of collateral dependent financing receivables. + References No definition available. + Details
Name: | alrs_FinancingReceivableAmortizedCostsCollateralDependentLoans
Namespace Prefix: | alrs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_CommercialBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_ConsumerBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=alrs_RealEstateFirstMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=alrs_RealEstateJuniorLienMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=alrs_OtherRevolvingAndInstallmentPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=alrs_OtherCollateralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |