XML 76 R66.htm IDEA: XBRL DOCUMENT v3.23.1

Loans and Allowance for Loan Losses - Collateral Dependent Loans (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	$ 120
Allowance for credit loss, collateral dependent loans	70
Commercial
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	120
Allowance for credit loss, collateral dependent loans	60
Commercial | Commercial and industrial
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	120
Allowance for credit loss, collateral dependent loans	60
Consumer
Loans and Allowance for Loan Losses
Allowance for credit loss, collateral dependent loans	10
Consumer | Real estate first mortgage
Loans and Allowance for Loan Losses
Allowance for credit loss, collateral dependent loans	10
Real Estate
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	424
Real Estate | Consumer
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	424
Real Estate | Consumer | Real estate first mortgage
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	424
Equipment
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	120
Equipment | Commercial
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	120
Equipment | Commercial | Commercial and industrial
Loans and Allowance for Loan Losses
Amortized costs, collateral dependent loans	$ 120

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_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: