XML 73 R61.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Loans and Allowance for Loan Losses - Loans by risk category (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Loans outstanding by loan portfolio segment and risk category |  |
Loans | $ 2,318,231 | $ 1,758,020
Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 2,301,081 | 1,736,781
Special Mention |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 3,904 | 480
Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 13,246 | 20,759
Commercial |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 1,472,938 | 1,076,273
Commercial | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 1,458,772 | 1,056,145
Commercial | Special Mention |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 3,840 | 480
Commercial | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 10,326 | 19,648
Commercial | Commercial and industrial |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 564,655 | 436,761
Commercial | Commercial and industrial | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 559,647 | 430,235
Commercial | Commercial and industrial | Special Mention |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans |  | 480
Commercial | Commercial and industrial | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 5,008 | 6,046
Commercial | Real estate construction |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 89,215 | 40,619
Commercial | Real estate construction | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 89,215 | 40,619
Commercial | Commercial real estate |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 819,068 | 598,893
Commercial | Commercial real estate | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 809,910 | 585,291
Commercial | Commercial real estate | Special Mention |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 3,840 |
Commercial | Commercial real estate | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 5,318 | 13,602
Consumer |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 845,293 | 681,747
Consumer | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 842,309 | 680,636
Consumer | Special Mention |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 64 |
Consumer | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 2,920 | 1,111
Consumer | Residential | Real estate first mortgage |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 649,818 | 510,716
Consumer | Residential | Real estate first mortgage | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 647,517 | 510,375
Consumer | Residential | Real estate first mortgage | Special Mention |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 64 |
Consumer | Residential | Real estate first mortgage | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 2,237 | 341
Consumer | Residential | Real estate junior lien |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 143,681 | 125,668
Consumer | Residential | Real estate junior lien | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 143,006 | 124,898
Consumer | Residential | Real estate junior lien | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 675 | 770
Consumer | Other revolving and installment |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 51,794 | 45,363
Consumer | Other revolving and installment | Pass |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | 51,786 | $ 45,363
Consumer | Other revolving and installment | Substandard |  |
Loans outstanding by loan portfolio segment and risk category |  |
Loans | $ 8 |

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=124259787&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: |