XML 95 R73.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Note 3 - Business Combinations - Schedule of Business Acquisition, Pro Forma Information (Details) - Metro Phoenix Bank [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Net interest income after provision for credit losses | $ 118,367 | $ 134,492 | $ 107,172 | $ 104,087
Noninterest income | 121,765 | 88,510 | 112,755 | 151,499
Noninterest expense | 203,542 | 186,020 | 166,476 | 178,337
Net income (after tax) | $ 28,159 | $ 26,981 | $ 40,784 | $ 58,585

X
- Definition The pro-forma net interest income after provision for credit losses for a period as if the business combination or combinations had been completed at the beginning of the period. + References No definition available. + Details
Name: | alrs_BusinessAcquisitionProFormaInterestIncomeNet
Namespace Prefix: | alrs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The pro forma non-interest income for a period as if the business combination or combinations had been completed at the beginning of the period. + References No definition available. + Details
Name: | alrs_BusinessAcquisitionProFormaNoninterestExpense
Namespace Prefix: | alrs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The pro forma non-interest income for a period as if the business combination or combinations had been completed at the beginning of the period. + References No definition available. + Details
Name: | alrs_BusinessAcquisitionProFormaNoninterestIncome
Namespace Prefix: | alrs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=alrs_MetroPhoenixBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |