XML 64 R53.htm IDEA: XBRL DOCUMENT v3.21.2

Loans and Allowance for Loan Losses - Loans by risk category (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Loans outstanding by loan portfolio segment and risk category
Loans	$ 1,835,312	$ 1,979,375
Pass
Loans outstanding by loan portfolio segment and risk category
Loans	1,795,036	1,922,704
Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	5,249	15,326
Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	35,027	41,345
Commercial
Loans outstanding by loan portfolio segment and risk category
Loans	1,177,270	1,299,316
Commercial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	1,140,311	1,247,786
Commercial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	4,854	12,101
Commercial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	32,105	39,429
Commercial | Commercial and industrial
Loans outstanding by loan portfolio segment and risk category
Loans	572,734	691,858
Commercial | Commercial and industrial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	561,345	669,602
Commercial | Commercial and industrial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	1,515	5,415
Commercial | Commercial and industrial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	9,874	16,841
Commercial | Real estate construction
Loans outstanding by loan portfolio segment and risk category
Loans	36,549	44,451
Commercial | Real estate construction | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	36,549	44,451
Commercial | Commercial real estate
Loans outstanding by loan portfolio segment and risk category
Loans	567,987	563,007
Commercial | Commercial real estate | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	542,417	533,733
Commercial | Commercial real estate | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	3,339	6,686
Commercial | Commercial real estate | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	22,231	22,588
Consumer
Loans outstanding by loan portfolio segment and risk category
Loans	658,042	680,059
Consumer | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	654,725	674,918
Consumer | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	395	3,225
Consumer | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	2,922	1,916
Consumer | Residential | Real estate first mortgage
Loans outstanding by loan portfolio segment and risk category
Loans	470,822	463,370
Consumer | Residential | Real estate first mortgage | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	469,037	461,221
Consumer | Residential | Real estate first mortgage | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		1,406
Consumer | Residential | Real estate first mortgage | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	1,785	743
Consumer | Residential | Real estate junior lien
Loans outstanding by loan portfolio segment and risk category
Loans	130,180	143,416
Consumer | Residential | Real estate junior lien | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	128,661	140,461
Consumer | Residential | Real estate junior lien | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	395	1,819
Consumer | Residential | Real estate junior lien | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	1,124	1,136
Consumer | Other revolving and installment
Loans outstanding by loan portfolio segment and risk category
Loans	57,040	73,273
Consumer | Other revolving and installment | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	57,027	73,236
Consumer | Other revolving and installment | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	$ 13	$ 37

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_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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_FinancingReceivablePortfolioSegmentAxis=alrs_RealEstateConstructionPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
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_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
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_FinancingReceivablePortfolioSegmentAxis=alrs_OtherRevolvingAndInstallmentPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: