XML 97 R80.htm IDEA: XBRL DOCUMENT v3.20.4

Loans and Allowance for Loan Losses - Loans by risk category (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Loans outstanding by loan portfolio segment and risk category
Loans	$ 1,979,375	$ 1,721,279
Pass
Loans outstanding by loan portfolio segment and risk category
Loans	1,922,704	1,654,719
Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	15,326	12,226
Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	41,345	54,334
Commercial
Loans outstanding by loan portfolio segment and risk category
Loans	1,299,316	1,000,225
Commercial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	1,247,786	935,719
Commercial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	12,101	12,226
Commercial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	39,429	52,280
Commercial | Commercial and industrial
Loans outstanding by loan portfolio segment and risk category
Loans	691,858	479,144
Commercial | Commercial and industrial | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	669,602	448,306
Commercial | Commercial and industrial | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	5,415	9,585
Commercial | Commercial and industrial | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	16,841	21,253
Commercial | Real estate construction
Loans outstanding by loan portfolio segment and risk category
Loans	44,451	26,378
Commercial | Real estate construction | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	44,451	25,119
Commercial | Real estate construction | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans		282
Commercial | Real estate construction | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans		977
Commercial | Commercial real estate
Loans outstanding by loan portfolio segment and risk category
Loans	563,007	494,703
Commercial | Commercial real estate | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	533,733	462,294
Commercial | Commercial real estate | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	6,686	2,359
Commercial | Commercial real estate | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	22,588	30,050
Consumer
Loans outstanding by loan portfolio segment and risk category
Loans	680,059	721,054
Consumer | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	674,918	719,000
Consumer | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	3,225
Consumer | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	1,916	2,054
Consumer | Residential | Real estate first mortgage
Loans outstanding by loan portfolio segment and risk category
Loans	463,370	457,155
Consumer | Residential | Real estate first mortgage | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	461,221	456,358
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	743	797
Consumer | Residential | Real estate junior lien
Loans outstanding by loan portfolio segment and risk category
Loans	143,416	177,373
Consumer | Residential | Real estate junior lien | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	140,461	176,122
Consumer | Residential | Real estate junior lien | Special Mention
Loans outstanding by loan portfolio segment and risk category
Loans	1,819
Consumer | Residential | Real estate junior lien | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	1,136	1,251
Consumer | Other revolving and installment
Loans outstanding by loan portfolio segment and risk category
Loans	73,273	86,526
Consumer | Other revolving and installment | Pass
Loans outstanding by loan portfolio segment and risk category
Loans	73,236	86,520
Consumer | Other revolving and installment | Substandard
Loans outstanding by loan portfolio segment and risk category
Loans	$ 37	$ 6

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: