$ALRS
ALERUS FINANCIAL CORP Stock $alrs

$alrs Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000155837023003515 Filed on March 13, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$37.81M		$115.6M
YoY Change	63.93%		24.74%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.130M	$2.351M	$3.000M
YoY Change	1.43%	6.86%	-16.67%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$14.15M		$15.85M
YoY Change	917.33%		185.14%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$10.49M	$14.53M	$52.18M
YoY Change	-19.74%	-13.13%	-24.46%
Income Tax	$2.306M	$3.624M	$12.18M
% Of Pretax Income	21.98%	24.94%	23.34%
Net Earnings	$8.186M	$10.81M	$40.01M
YoY Change	-19.62%	-14.99%	-24.06%
Net Earnings / Revenue	21.65%		34.61%
Basic Earnings Per Share	$0.41		$2.12
Diluted Earnings Per Share	$0.40	$0.53	$2.10
COMMON SHARES
Basic Shares Outstanding	20.06M	19.99M	18.64M
Diluted Shares Outstanding	20.25M		18.88M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$145.2M	$58.24M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$22.75M	$22.71M	$22.71M
YoY Change	8.35%	2.75%	2.75%
Goodwill	$47.09M	$47.09M
YoY Change	49.53%	49.53%
Intangibles	$21.13M	$22.46M
YoY Change	10.07%	10.89%
Long-Term Investments			$14.00K
YoY Change
Other Assets	$41.62M	$42.37M	$42.37M
YoY Change	77.11%	265.25%	265.25%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$3.887B	$3.780B	$3.780B
YoY Change	16.5%	11.41%	11.4%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$64.66M	$70.36M	$70.36M
YoY Change	14.44%	30.78%	30.78%
Deferred Revenue
YoY Change
Short-Term Debt	$372.1M	$378.1M	$153.1M
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$436.8M	$70.36M	$70.36M
YoY Change	673.11%	30.78%	30.78%
LONG-TERM LIABILITIES
Long-Term Debt	$58.87M	$58.84M	$58.84M
YoY Change	-0.05%	-0.1%	-0.1%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$58.87M	$58.84M	$58.84M
YoY Change	-0.05%	-0.1%	-0.1%
TOTAL LIABILITIES
Total Short-Term Liabilities	$436.8M	$70.36M	$70.36M
Total Long-Term Liabilities	$58.87M	$58.84M	$58.84M
Total Liabilities	$3.528B	$3.423B	$3.423B
YoY Change	17.29%	12.84%	12.84%
SHAREHOLDERS EQUITY
Retained Earnings	$280.5M	$280.4M
YoY Change	7.5%	10.59%
Common Stock	$20.07M	$19.99M
YoY Change	16.07%	16.14%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$359.1M	$356.9M	$356.9M
YoY Change
Total Liabilities & Shareholders Equity	$3.887B	$3.780B	$3.780B
YoY Change	16.5%	11.41%	11.4%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$8.186M	$10.81M	$40.01M
YoY Change	-19.62%	-14.99%	-24.06%
Depreciation, Depletion And Amortization	$2.130M	$2.351M	$3.000M
YoY Change	1.43%	6.86%	-16.67%
Cash From Operating Activities	$445.0K	$48.23M	$103.0M
YoY Change	-98.72%	53.6%	-30.95%
INVESTING ACTIVITIES
Capital Expenditures	$923.0K	$708.0K	$1.789M
YoY Change	610.0%	-178.67%	4.87%
Acquisitions			-$101.5M
YoY Change
Other Investing Activities	-$19.16M	-$117.7M	-$290.8M
YoY Change	-82.97%	-22.62%	-29.95%
Cash From Investing Activities	-$20.08M	-$118.4M	-$292.6M
YoY Change	-82.16%	-22.56%	-29.82%
FINANCING ACTIVITIES
Cash Dividend Paid	$3.620M		$12.80M
YoY Change	30.03%		19.06%
Common Stock Issuance & Retirement, Net			$738.0K
YoY Change			3.65%
Debt Paid & Issued, Net			$203.0K
YoY Change			-99.59%
Cash From Financing Activities	106.6M	74.25M	5.587M
YoY Change	-435.85%	-63.69%	-98.34%
NET CHANGE
Cash From Operating Activities	445.0K	48.23M	103.0M
Cash From Investing Activities	-20.08M	-118.4M	-292.6M
Cash From Financing Activities	106.6M	74.25M	5.587M
Net Change In Cash	86.94M	4.075M	-184.1M
YoY Change	-179.41%	-95.09%	-365.42%
FREE CASH FLOW
Cash From Operating Activities	$445.0K	$48.23M	$103.0M
Capital Expenditures	$923.0K	$708.0K	$1.789M
Free Cash Flow	-$478.0K	$47.52M	$101.2M
YoY Change	-101.38%	47.13%	-31.36%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2022	dei	Document Type DocumentType	10-K
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2021Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebt
CY2022Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebt
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000903419
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19991681
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17212588
CY2022	us-gaap	Revenue Practical Expedient Incremental Cost Of Obtaining Contract RevenuePracticalExpedientIncrementalCostOfObtainingContract	true
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-39036
CY2022	dei	Entity Registrant Name EntityRegistrantName	ALERUS FINANCIAL CORPORATION
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	45-0375407
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	401 Demers Avenue
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Grand Forks
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	ND
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	58201
CY2022	dei	City Area Code CityAreaCode	701
CY2022	dei	Local Phone Number LocalPhoneNumber	795-3200
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $1.00 per share
CY2022	dei	Trading Symbol TradingSymbol	ALRS
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	true
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CY2022	dei	Entity Shell Company EntityShellCompany	false
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CY2022	dei	Auditor Name AuditorName	CliftonLarsonAllen LLP
CY2022	dei	Auditor Location AuditorLocation	Minneapolis, Minnesota
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CY2020	us-gaap	Noninterest Expense NoninterestExpense	163799000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52182000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69077000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	58518000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12177000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16396000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13843000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40005000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52681000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	44675000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.12
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.02
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.10
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.97
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.52
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.70
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.63
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18640000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17189000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17106000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18884000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17486000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17438000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40005000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52681000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	44675000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-125634000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-19433000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	14355000
CY2022	alrs	Oci Debt Securities Reclassified To Held To Maturity Accretion Of Unrealized Gain Loss Before Adjustment And Tax OciDebtSecuritiesReclassifiedToHeldToMaturityAccretionOfUnrealizedGainLossBeforeAdjustmentAndTax	382000
CY2021	alrs	Oci Debt Securities Reclassified To Held To Maturity Accretion Of Unrealized Gain Loss Before Adjustment And Tax OciDebtSecuritiesReclassifiedToHeldToMaturityAccretionOfUnrealizedGainLossBeforeAdjustmentAndTax	326000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	125000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	2737000
CY2022	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-126016000
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-19884000
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	11618000
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-31630000
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-4991000
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	2916000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-94386000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14893000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8702000
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-54381000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	37788000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	53377000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	359403000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40005000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-94386000
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	738000
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	13146000
CY2022	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	63830000
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1904000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	356872000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	330163000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52681000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14893000
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	712000
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	10931000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3095000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	359403000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	285728000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	44675000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8702000
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	482000
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	10387000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1927000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	330163000
CY2022	us-gaap	Profit Loss ProfitLoss	40005000
CY2021	us-gaap	Profit Loss ProfitLoss	52681000
CY2020	us-gaap	Profit Loss ProfitLoss	44675000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	913000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2786000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4434000
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3500000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10900000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8467000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8868000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8950000
CY2022	alrs	Amortization And Accretion Of Premiums Discounts On Investment Securities AmortizationAndAccretionOfPremiumsDiscountsOnInvestmentSecurities	3387000
CY2021	alrs	Amortization And Accretion Of Premiums Discounts On Investment Securities AmortizationAndAccretionOfPremiumsDiscountsOnInvestmentSecurities	3744000
CY2020	alrs	Amortization And Accretion Of Premiums Discounts On Investment Securities AmortizationAndAccretionOfPremiumsDiscountsOnInvestmentSecurities	1760000
CY2022	alrs	Operating Lease Right Of Use Asset Amortization Expenses OperatingLeaseRightOfUseAssetAmortizationExpenses	229000
CY2021	alrs	Operating Lease Right Of Use Asset Amortization Expenses OperatingLeaseRightOfUseAssetAmortizationExpenses	58000
CY2020	alrs	Operating Lease Right Of Use Asset Amortization Expenses OperatingLeaseRightOfUseAssetAmortizationExpenses	25000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	1904000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	3095000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	1927000
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	835000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	793000
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	797000
CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	33000
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	62000
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-707000
CY2022	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-2006000
CY2021	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-8459000
CY2020	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-1927000
CY2022	alrs	Gain Loss On Loans Sold GainLossOnLoansSold	11616000
CY2021	alrs	Gain Loss On Loans Sold GainLossOnLoansSold	48038000
CY2020	alrs	Gain Loss On Loans Sold GainLossOnLoansSold	57070000
CY2022	alrs	Gain Loss On Sale Of Foreclosed Assets GainLossOnSaleOfForeclosedAssets	-71000
CY2021	alrs	Gain Loss On Sale Of Foreclosed Assets GainLossOnSaleOfForeclosedAssets	275000
CY2020	alrs	Gain Loss On Sale Of Foreclosed Assets GainLossOnSaleOfForeclosedAssets	28000
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	125000
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	2737000
CY2022	alrs	Gain Loss On Servicing Rights GainLossOnServicingRights	702000
CY2021	alrs	Gain Loss On Servicing Rights GainLossOnServicingRights	638000
CY2020	alrs	Gain Loss On Servicing Rights GainLossOnServicingRights	-936000
CY2022	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-48539000
CY2021	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-123945000
CY2020	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	18621000
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	3241000
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1125000
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2111000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-5357000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7247000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2684000
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	8973000
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	5865000
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-5527000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	102966000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	149832000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-22252000
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	13189000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	75647000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	105633000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	125581000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	69680000
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	95600000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	571595000
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	414724000
CY2022	alrs	Proceeds From Sale Or Calls Of Held To Maturity Securities ProceedsFromSaleOrCallsOfHeldToMaturitySecurities	963000
CY2021	alrs	Proceeds From Sale Or Calls Of Held To Maturity Securities ProceedsFromSaleOrCallsOfHeldToMaturitySecurities	1772000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	27429000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	12545000
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	218363000
CY2020	alrs	Proceeds From Payments For Equity Securities ProceedsFromPaymentsForEquitySecurities	2808000
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	416150000
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-221006000
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	259130000
CY2022	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	15556000
CY2021	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	716000
CY2020	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	10000
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-101511000
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	9279000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1789000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1706000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3811000
CY2022	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	937000
CY2021	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	629000
CY2020	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	429000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-292622000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-417658000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-538390000
CY2022	alrs	Proceeds From Repayment Of Deposits From Customers ProceedsFromRepaymentOfDepositsFromCustomers	-358752000
CY2021	alrs	Proceeds From Repayment Of Deposits From Customers ProceedsFromRepaymentOfDepositsFromCustomers	348558000
CY2020	alrs	Proceeds From Repayment Of Deposits From Customers ProceedsFromRepaymentOfDepositsFromCustomers	600677000
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	378080000
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	203000
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	49920000
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	210000
CY2021	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	50000000
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	12800000
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	10751000
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	10387000
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	738000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	712000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	482000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5587000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	337175000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	589598000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-184069000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	69349000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28956000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	242311000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	172962000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	144006000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	58242000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	242311000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	172962000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	15095000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	4538000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	12641000
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12531000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13124000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13582000
CY2022	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	101696000
CY2020	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	513000
CY2022	alrs	Loan Collateral Transferred To Foreclosed Assets LoanCollateralTransferredToForeclosedAssets	153000
CY2021	alrs	Loan Collateral Transferred To Foreclosed Assets LoanCollateralTransferredToForeclosedAssets	1176000
CY2020	alrs	Loan Collateral Transferred To Foreclosed Assets LoanCollateralTransferredToForeclosedAssets	456000
CY2022	alrs	Noncash Debt Securities Available For Sale Unrealized Gain Loss NoncashDebtSecuritiesAvailableForSaleUnrealizedGainLoss	-94004000
CY2021	alrs	Noncash Debt Securities Available For Sale Unrealized Gain Loss NoncashDebtSecuritiesAvailableForSaleUnrealizedGainLoss	-14567000
CY2020	alrs	Noncash Debt Securities Available For Sale Unrealized Gain Loss NoncashDebtSecuritiesAvailableForSaleUnrealizedGainLoss	8702000
CY2022	alrs	Investment Securities Held To Maturity Accretion Of Unrealized Gain Loss InvestmentSecuritiesHeldToMaturityAccretionOfUnrealizedGainLoss	382000
CY2021	alrs	Investment Securities Held To Maturity Accretion Of Unrealized Gain Loss InvestmentSecuritiesHeldToMaturityAccretionOfUnrealizedGainLoss	326000
CY2021	us-gaap	Transfer Of Investments TransferOfInvestments	149191000
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4266000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	267000
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1555000
CY2021	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	225000
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	297745000
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	14627000
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	354358000
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	5348000
CY2022	alrs	Cash Acquired From Stock Issuance On Acquisition CashAcquiredFromStockIssuanceOnAcquisition	-64019000
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	-120632000
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	9279000
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;margin:0pt 0pt 12pt 0pt;">Use of Estimates</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 12pt 0pt;">The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, or GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the fair value of assets acquired and liabilities assumed from an acquisition and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 12pt 0pt;">Material estimates that are particularly susceptible to significant change in the near term include the valuation of investment securities, determination of the allowance for loan losses, valuation of reporting units for the purpose of testing goodwill and other intangible assets for impairment, valuation of deferred tax assets, and fair values of financial instruments.</p>
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	132264000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	717324000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	321902000
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;margin:0pt 0pt 12pt 0pt;">Concentrations of Credit Risk</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 12pt 0pt;">Substantially all of the Company’s lending activities are with clients located within North Dakota, Minnesota, and Arizona. At December 31, 2022 and 2021 respectively, 23.9% and 24.8% of the Company’s loan portfolio consisted of commercial and industrial loans that were not secured by real estate. The Company does not have any significant loan concentrations in any one industry or with any one client. Note 6 (Loans and Allowance for Loan Losses) discusses the Company’s loan portfolio.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 12pt 0pt;">The Company invests in a variety of investment securities and does not have any significant concentrations in any one industry or to any one issuer. Note 5 (Investment Securities) discusses the Company’s investment securities portfolio.</p>
CY2022	alrs	Percentage Of Commercial And Industrial Loans PercentageOfCommercialAndIndustrialLoans	0.239
CY2021	alrs	Percentage Of Commercial And Industrial Loans PercentageOfCommercialAndIndustrialLoans	0.248
CY2022	alrs	Period Past Due Accrual Of Loan Interest Discontinued PeriodPastDueAccrualOfLoanInterestDiscontinued	P90D
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	50990000
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	270912000
CY2022Q4	alrs	Available For Sale And Held To Maturity Amortized Cost AvailableForSaleAndHeldToMaturityAmortizedCost	1171469000
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0
CY2022Q4	alrs	Percentage Of Company Loans Libor Used As Index Rate PercentageOfCompanyLoansLiborUsedAsIndexRate	0.069
CY2022Q4	alrs	Available For Sale And Held To Maturity Unrealized Gains AvailableForSaleAndHeldToMaturityUnrealizedGains	21000
CY2021Q4	alrs	Amount Of Minimum Average Reserve Balances Required To Be Maintained AmountOfMinimumAverageReserveBalancesRequiredToBeMaintained	0
CY2022Q4	alrs	Amount Of Minimum Average Reserve Balances Required To Be Maintained AmountOfMinimumAverageReserveBalancesRequiredToBeMaintained	0
CY2022Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	28000000.0
CY2021Q4	us-gaap	Cash And Securities Segregated Under Federal And Other Regulations CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations	224400000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	849567000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	21000
CY2020	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	178000
CY2022Q4	alrs	Available For Sale And Held To Maturity Unrealized Losses AvailableForSaleAndHeldToMaturityUnrealizedLosses	183254000
CY2022Q4	alrs	Available For Sale And Held To Maturity Fair Value AvailableForSaleAndHeldToMaturityFairValue	988236000
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	860258000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5362000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	11971000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	853649000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	352061000
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	1110000
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	3494000
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	349677000
CY2021Q4	alrs	Available For Sale And Held To Maturity Amortized Cost AvailableForSaleAndHeldToMaturityAmortizedCost	1212319000
CY2021Q4	alrs	Available For Sale And Held To Maturity Unrealized Gains AvailableForSaleAndHeldToMaturityUnrealizedGains	6472000
CY2021Q4	alrs	Available For Sale And Held To Maturity Unrealized Losses AvailableForSaleAndHeldToMaturityUnrealizedLosses	15465000
CY2021Q4	alrs	Available For Sale And Held To Maturity Fair Value AvailableForSaleAndHeldToMaturityFairValue	1203326000
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	6554000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	6522000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	4000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	4000
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	40317000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	37146000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	21256000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	19863000
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	69992000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	59138000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	87961000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	79697000
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	205039000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	168106000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	740346000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	617760000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	321902000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	270912000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	849567000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	717324000
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	260700000
CY2021Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	192800000
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	13189000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	75647000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	114000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	2737000
CY2022	alrs	Proceeds From Sale Or Calls Of Held To Maturity Securities ProceedsFromSaleOrCallsOfHeldToMaturitySecurities	963000
CY2021	alrs	Proceeds From Sale Or Calls Of Held To Maturity Securities ProceedsFromSaleOrCallsOfHeldToMaturitySecurities	1772000
CY2021	alrs	Debt Securities Held To Maturity Sold Realized Gain DebtSecuritiesHeldToMaturitySoldRealizedGain	11000
CY2022	alrs	Number Of Held To Maturity Securities Sold NumberOfHeldToMaturitySecuritiesSold	0
CY2021	alrs	Number Of Held To Maturity Securities Sold NumberOfHeldToMaturitySecuritiesSold	1
CY2021Q4	alrs	Debt Securities Held To Maturity Amortized Cost DebtSecuritiesHeldToMaturityAmortizedCost	330000
CY2021	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	348000
CY2021	alrs	Debt Securities Held To Maturity Sold Realized Gain DebtSecuritiesHeldToMaturitySoldRealizedGain	11000
CY2020	alrs	Number Of Held To Maturity Securities Sold NumberOfHeldToMaturitySecuritiesSold	0
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	19761000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	178719000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	112503000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	535024000
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	132264000
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	713743000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3336000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	18788000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	47654000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	249623000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	50990000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	268411000
CY2022Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	23097000
CY2022Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPositionLessThan12Months	197507000
CY2022Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	160157000
CY2022Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPosition12MonthsOrLonger	784647000
CY2022Q4	alrs	Debt Securities Available For Sale And Held To Maturity Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityUnrealizedLossPositionAccumulatedLoss	183254000
CY2022Q4	alrs	Debt Securities Available For Sale And Held To Maturity Unrealized Loss Position DebtSecuritiesAvailableForSaleAndHeldToMaturityUnrealizedLossPosition	982154000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	10290000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	578270000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1681000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	55084000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	11971000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	633354000
CY2021Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3494000
CY2021Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	257583000
CY2021Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	3494000
CY2021Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	257583000
CY2021Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	13784000
CY2021Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPositionLessThan12Months	835853000
CY2021Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1681000
CY2021Q4	alrs	Debt Securities Available For Sale And Held To Maturity Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleAndHeldToMaturityContinuousUnrealizedLossPosition12MonthsOrLonger	55084000
CY2021Q4	alrs	Debt Securities Available For Sale And Held To Maturity Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityUnrealizedLossPositionAccumulatedLoss	15465000
CY2021Q4	alrs	Debt Securities Available For Sale And Held To Maturity Unrealized Loss Position DebtSecuritiesAvailableForSaleAndHeldToMaturityUnrealizedLossPosition	890937000
CY2022Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	4595000
CY2021Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	2675000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	19362000
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	3806000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2443994000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1758020000
CY2022Q4	alrs	Deferred Loan Fees And Costs DeferredLoanFeesAndCosts	919000
CY2021Q4	alrs	Deferred Loan Fees And Costs DeferredLoanFeesAndCosts	231000
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	2752000
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1755268000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1758020000
CY2022	alrs	Financing Receivable Accrued Interest Additions FinancingReceivableAccruedInterestAdditions	225000
CY2022	alrs	Financing Receivable Accrued Interest Accretion Of Income FinancingReceivableAccruedInterestAccretionOfIncome	48000
CY2022Q4	alrs	Financing Receivable Accrued Interest After Allowance For Credit Losses FinancingReceivableAccruedInterestAfterAllowanceForCreditLosses	177000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3794000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2443994000
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	2076000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1758020000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2443994000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1758020000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31572000
CY2022	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1549000
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	1123000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31146000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	34246000
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-3500000
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1922000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	2748000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31572000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	23924000
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	10900000
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	5368000
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	4790000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	34246000
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3767000
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2440227000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2443994000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	954000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	29924000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31146000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	283000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	30109000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31572000
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1833000
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2051000
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	954000
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	625000
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	667000
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	283000
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	1934000
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	2219000
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	2127000
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	2403000
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3767000
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	4270000
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	954000
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	2752000
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3070000
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	283000
CY2022	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2099000
CY2022	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	13000
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	704000
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	20000
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	4784000
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	152000
CY2022	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	2092000
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	2782000
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	20000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	6460000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	28000
CY2022	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	4191000
CY2022	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	13000
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3486000
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	40000
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11244000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	180000
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0
CY2022	alrs	Financing Receivable Number Of Loan Modifications FinancingReceivableNumberOfLoanModifications	0
CY2022	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	524000
CY2021	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	745000
CY2020	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	922000
CY2022	us-gaap	Servicing Asset At Amortized Value Valuation Allowance ServicingAssetAtAmortizedValueValuationAllowance	665000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	69837000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	67895000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	52549000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	49525000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	17288000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	18370000
CY2022	us-gaap	Depreciation Depreciation	3000000.0
CY2021	us-gaap	Depreciation Depreciation	3600000
CY2020	us-gaap	Depreciation Depreciation	3900000
CY2022Q4	us-gaap	Goodwill Goodwill	47100000
CY2021Q4	us-gaap	Goodwill Goodwill	31500000
CY2022Q4	us-gaap	Goodwill Goodwill	47087000
CY2021Q4	us-gaap	Goodwill Goodwill	31490000
CY2022	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	622000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	49015000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	26560000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	22455000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	42057000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	21807000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20250000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4800000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4400000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4000000.0
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	5297000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	5043000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3904000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	2275000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2275000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	3661000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	22455000
CY2022Q4	alrs	Servicing Asset Other ServicingAssetOther	357200000
CY2021Q4	alrs	Servicing Asset Other ServicingAssetOther	345800000
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1880000
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1987000
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	3845000
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	6333000
CY2021	us-gaap	Servicing Asset At Amortized Value Valuation Allowance ServicingAssetAtAmortizedValueValuationAllowance	413000
CY2020	us-gaap	Servicing Asset At Amortized Value Valuation Allowance ServicingAssetAtAmortizedValueValuationAllowance	-1114000
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	2643000
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1880000
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	1987000
CY2022Q4	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	2643000
CY2021Q4	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	1880000
CY2022	us-gaap	Assumption For Fair Value Of Assets Or Liabilities That Relate To Transferors Continuing Involvement Weighted Average Life1 AssumptionForFairValueOfAssetsOrLiabilitiesThatRelateToTransferorsContinuingInvolvementWeightedAverageLife1	P20Y6M
CY2021	us-gaap	Assumption For Fair Value Of Assets Or Liabilities That Relate To Transferors Continuing Involvement Weighted Average Life1 AssumptionForFairValueOfAssetsOrLiabilitiesThatRelateToTransferorsContinuingInvolvementWeightedAverageLife1	P20Y3M18D
CY2022	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Prepayment Speed AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed	0.069
CY2021	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Prepayment Speed AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed	0.142
CY2022	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Discount Rate AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesDiscountRate	0.105
CY2021	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Discount Rate AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesDiscountRate	0.095
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5419000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3727000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	87000
CY2022Q4	alrs	Lease Right Of Use Asset LeaseRightOfUseAsset	5419000
CY2021Q4	alrs	Lease Right Of Use Asset LeaseRightOfUseAsset	3814000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	5902000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	4275000
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	203000
CY2022Q4	alrs	Lease Liability LeaseLiability	5902000
CY2021Q4	alrs	Lease Liability LeaseLiability	4478000
CY2022	alrs	Minimum Number Of Options To Renew Lease MinimumNumberOfOptionsToRenewLease	1
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	3382000
CY2022Q4	alrs	Low Income Housing Tax Credit LowIncomeHousingTaxCredit	17642000
CY2021Q4	alrs	Low Income Housing Tax Credit LowIncomeHousingTaxCredit	7906000
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y4M24D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P0Y9M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.025
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.078
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1799000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	1827000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	2457000
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	899000
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	823000
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	1170000
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	217000
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	181000
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	395000
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	7000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	25000
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	42000
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	87000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	116000
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	116000
CY2022	us-gaap	Sublease Income SubleaseIncome	238000
CY2021	us-gaap	Sublease Income SubleaseIncome	228000
CY2020	us-gaap	Sublease Income SubleaseIncome	228000
CY2022	us-gaap	Lease Cost LeaseCost	2771000
CY2021	us-gaap	Lease Cost LeaseCost	2744000
CY2020	us-gaap	Lease Cost LeaseCost	3952000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	1706000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	1763000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	2432000
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4266000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	267000
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1555000
CY2022Q4	alrs	Miscellaneous Other Assets MiscellaneousOtherAssets	3426000
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	2856000
CY2021Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	1146000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	1987000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	1236000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	1118000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	936000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	385000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	854000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6516000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	614000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	5902000
CY2022Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	4595000
CY2021Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	2675000
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	30000
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	885000
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	6770000
CY2021Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	5325000
CY2022Q4	alrs	Investments In Partnerships InvestmentsInPartnerships	14000
CY2021Q4	alrs	Investments In Partnerships InvestmentsInPartnerships	14000
CY2022Q4	alrs	Trust Fees Receivable TrustFeesReceivable	14684000
CY2021Q4	alrs	Trust Fees Receivable TrustFeesReceivable	14680000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	19362000
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	3806000
CY2022Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	60310000
CY2021Q4	alrs	Miscellaneous Other Assets MiscellaneousOtherAssets	2889000
CY2022Q4	us-gaap	Other Assets OtherAssets	75712000
CY2021Q4	us-gaap	Other Assets OtherAssets	42708000
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	860987000
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	938840000
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	706275000
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	714669000
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	99882000
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	96825000
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	1035981000
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	937305000
CY2022Q4	us-gaap	Time Deposits TimeDeposits	212359000
CY2021Q4	us-gaap	Time Deposits TimeDeposits	232912000
CY2022Q4	alrs	Interest Bearing Deposit Liabilities Including Time Deposits InterestBearingDepositLiabilitiesIncludingTimeDeposits	2054497000
CY2021Q4	alrs	Interest Bearing Deposit Liabilities Including Time Deposits InterestBearingDepositLiabilitiesIncludingTimeDeposits	1981711000
CY2022Q4	us-gaap	Deposits Deposits	2915484000
CY2021Q4	us-gaap	Deposits Deposits	2920551000
CY2022Q4	alrs	Deposits Overdrafts DepositsOverdrafts	202000
CY2021Q4	alrs	Deposits Overdrafts DepositsOverdrafts	2900000
CY2022Q4	alrs	Time Deposits250000 Or More TimeDeposits250000OrMore	51100000
CY2021Q4	alrs	Time Deposits250000 Or More TimeDeposits250000OrMore	91500000
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	169062000
CY2022Q4	us-gaap	Time Deposit Maturities Rolling Year Two TimeDepositMaturitiesRollingYearTwo	22854000
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	4802000
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	10663000
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	1833000
CY2022Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	3145000
CY2022Q4	us-gaap	Time Deposits TimeDeposits	212359000
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	58843000
CY2022	alrs	Mortgage Banking Income MortgageBankingIncome	16921000
CY2021Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	63010000
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	58933000
CY2022Q4	alrs	Off Balance Sheet Credit Risk OffBalanceSheetCreditRisk	819520000
CY2021Q4	alrs	Off Balance Sheet Credit Risk OffBalanceSheetCreditRisk	678644000
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1900000
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3100000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1900000
CY2022	alrs	Number Of Plans NumberOfPlans	2
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5080000
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5137000
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5126000
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1111424
CY2021Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1207952
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1170611
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	634000
CY2022Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	3363000
CY2021	alrs	Mortgage Banking Income MortgageBankingIncome	48502000
CY2020	alrs	Mortgage Banking Income MortgageBankingIncome	61641000
CY2021	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	125000
CY2020	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	2737000
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	835000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	793000
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	797000
CY2022	us-gaap	Noninterest Income NoninterestIncome	111223000
CY2021	us-gaap	Noninterest Income NoninterestIncome	147387000
CY2020	us-gaap	Noninterest Income NoninterestIncome	149371000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	9005000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10731000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	14541000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	727000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2212000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3615000
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	9732000
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	12943000
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	10926000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2298000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2879000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3736000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	147000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	574000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-819000
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	2445000
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	3453000
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	2917000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12177000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16396000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13843000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	7818000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	7925000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	2455000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	2762000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	417000
CY2021Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	3341000
CY2022Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1665000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.008
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12177000
CY2021Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	58000
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	3000
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	42000
CY2022Q4	alrs	Deferred Tax Assets Nonaccrual Loan Interest DeferredTaxAssetsNonaccrualLoanInterest	74000
CY2021Q4	alrs	Deferred Tax Assets Nonaccrual Loan Interest DeferredTaxAssetsNonaccrualLoanInterest	86000
CY2022Q4	alrs	Deferred Tax Assets Unrealized Loss On Available For Sale Securities Gross DeferredTaxAssetsUnrealizedLossOnAvailableForSaleSecuritiesGross	33056000
CY2021Q4	alrs	Deferred Tax Assets Unrealized Loss On Available For Sale Securities Gross DeferredTaxAssetsUnrealizedLossOnAvailableForSaleSecuritiesGross	1426000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	884000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	518000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	49735000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	16792000
CY2022Q4	alrs	Deferred Tax Liabilities Accumulated Depreciation DeferredTaxLiabilitiesAccumulatedDepreciation	835000
CY2021Q4	alrs	Deferred Tax Liabilities Accumulated Depreciation DeferredTaxLiabilitiesAccumulatedDepreciation	918000
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	5115000
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	2752000
CY2022Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	663000
CY2021Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	451000
CY2022Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	552000
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1014000
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	201000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	43000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7366000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5178000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	42369000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	11614000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	10958000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14506000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	12289000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	514000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.010
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	556000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.008
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	527000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.009
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2297000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.044
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2973000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.043
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2522000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.043
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-564000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.011
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-527000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.008
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-441000
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.233
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16396000
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.237
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13843000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.236
CY2022Q4	alrs	Low Income Housing Tax Credit Gross LowIncomeHousingTaxCreditGross	17906000
CY2022Q4	alrs	Low Income Housing Tax Credit Unfunded Commitment LowIncomeHousingTaxCreditUnfundedCommitment	15559000
CY2021Q4	alrs	Low Income Housing Tax Credit Gross LowIncomeHousingTaxCreditGross	7906000
CY2021Q4	alrs	Low Income Housing Tax Credit Unfunded Commitment LowIncomeHousingTaxCreditUnfundedCommitment	6999000
CY2022	alrs	Amortization Expense On Housing Projects Tax Credit Investments AmortizationExpenseOnHousingProjectsTaxCreditInvestments	264000
CY2022	alrs	Tax Benefit On Qualified Housing Tax Credit Investments TaxBenefitOnQualifiedHousingTaxCreditInvestments	373000
CY2021	alrs	Amortization Expense On Housing Projects Tax Credit Investments AmortizationExpenseOnHousingProjectsTaxCreditInvestments	0
CY2021	alrs	Tax Benefit On Qualified Housing Tax Credit Investments TaxBenefitOnQualifiedHousingTaxCreditInvestments	8000
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	99729000
CY2022	us-gaap	Noninterest Income NoninterestIncome	111223000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	158770000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52182000
CY2022Q4	us-gaap	Assets Assets	3779637000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	87099000
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3500000
CY2021	us-gaap	Noninterest Income NoninterestIncome	147387000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	168909000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69077000
CY2021Q4	us-gaap	Assets Assets	3392691000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	83846000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10900000
CY2020	us-gaap	Noninterest Income NoninterestIncome	149371000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	163799000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	58518000
CY2020Q4	us-gaap	Assets Assets	3013771000
CY2022	alrs	Number Of Banking Offices NumberOfBankingOffices	14
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40005000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52681000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	44675000
CY2022	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	416000
CY2021	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	802000
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	770000
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39589000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	51879000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43905000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18640000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17189000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17106000
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	244000
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	297000
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	332000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18884000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17486000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17438000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.12
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.02
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.10
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.97
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.52
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	34000
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	254000
CY2022	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	145000
CY2021	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	132000
CY2022	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	95000
CY2021	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	352000
CY2022	us-gaap	Increase Decrease In Due From Related Parties IncreaseDecreaseInDueFromRelatedParties	-46000
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	130000
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	34000
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	587000
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	3600000
CY2022Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0
CY2021Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	19000
CY2022Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	389335000
CY2022Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1339
CY2022Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	130862000
CY2022Q4	alrs	Common Equity Tier One Capital Required For Capital Adequacy Ratio CommonEquityTierOneCapitalRequiredForCapitalAdequacyRatio	0.0450
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	398179000
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1369
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	174482000
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2022Q4	us-gaap	Capital Capital	479325000
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1648
CY2022Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	232643000
CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	398179000
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1125
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	141514000
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2021Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	314628000
CY2021Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1465
CY2021Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	96647000
CY2021Q4	alrs	Common Equity Tier One Capital Required For Capital Adequacy Ratio CommonEquityTierOneCapitalRequiredForCapitalAdequacyRatio	0.0450
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	323358000
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1506
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	128862000
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2021Q4	us-gaap	Capital Capital	400263000
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1864
CY2021Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	171816000
CY2021Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	323358000
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0979
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	132112000
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2021Q1	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	770000
CY2021Q1	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P36M
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2022	dei	Auditor Firm AuditorFirmId	655

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$ALRS
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2023 Q1 Form 10-K Financial Statement

#000155837023003515 Filed on March 13, 2023

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$ALRS ALERUS FINANCIAL CORP Stock $alrs

2023 Q1 Form 10-K Financial Statement

#000155837023003515 Filed on March 13, 2023

Income Statement

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Facts In Submission

Files In Submission

$ALRS
ALERUS FINANCIAL CORP Stock $alrs