$ASB
ASSOCIATED BANC-CORP Stock $asb

$asb Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000000778921000073 Filed on October 28, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue		$265.8M	$257.7M
YoY Change		3.13%	-16.12%
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	$16.40M	$18.40M	$18.30M
YoY Change	-19.61%	0.55%	-12.44%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$16.61M	$30.93M
YoY Change		-46.3%	-63.64%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$92.00M	$111.9M	-$12.90M
YoY Change	9.65%	-967.21%	-112.37%
Income Tax	$15.20M	$23.06M	-$58.11M
% Of Pretax Income	16.52%	20.61%
Net Earnings	$76.90M	$88.81M	$45.21M
YoY Change	14.78%	96.42%	-45.75%
Net Earnings / Revenue		33.42%	17.55%
Basic Earnings Per Share		$0.56	$0.26
Diluted Earnings Per Share	$513.4K	$0.56	$0.26
COMMON SHARES
Basic Shares Outstanding	150.1M shares	150.0M shares	152.4M shares
Diluted Shares Outstanding		151.1M shares	153.2M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.026B	$1.686B	$1.114B
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	$385.2M	$383.1M	$422.2M
YoY Change	-8.05%	-9.26%	-3.22%
Goodwill	$1.100B	$1.100B	$1.100B
YoY Change	0.0%	0.0%	-8.33%
Intangibles	$58.09M	$60.30M	$70.51M
YoY Change	-14.89%	-14.48%	-22.6%
Long-Term Investments	$294.0M	$301.0M	$314.0M
YoY Change	-1.01%	-4.14%	22.66%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$35.10B	$34.44B	$34.70B
YoY Change	5.04%	-0.75%	6.45%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$349.0M	$360.0M	$399.0M
YoY Change	-4.12%	-9.77%	-15.11%
Deferred Revenue
YoY Change
Short-Term Debt	$354.3M	$322.5M	$206.3M
YoY Change	40.4%	56.31%	90.25%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$349.0M	$360.0M	$399.0M
YoY Change	-4.12%	-9.77%	-15.11%
LONG-TERM LIABILITIES
Long-Term Debt	$249.0M	$249.0M	$1.571B
YoY Change	-54.64%	-84.15%	97.11%
Other Long-Term Liabilities	$40.00M	$41.00M	$57.00M
YoY Change	-16.67%	-28.07%
Total Long-Term Liabilities	$289.0M	$290.0M	$1.628B
YoY Change	-51.59%	-82.19%	104.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$349.0M	$360.0M	$399.0M
Total Long-Term Liabilities	$289.0M	$290.0M	$1.628B
Total Liabilities	$31.08B	$30.44B	$30.65B
YoY Change	5.97%	-0.68%	6.9%
SHAREHOLDERS EQUITY
Retained Earnings	$2.673B	$2.628B	$2.425B
YoY Change	8.69%	8.39%	3.58%
Common Stock	$1.716B	$1.714B	$1.719B
YoY Change	-0.38%	-0.31%	0.19%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$546.2M	$529.5M	$456.1M
YoY Change	19.74%	16.08%	28.2%
Treasury Stock Shares
Shareholders Equity	$4.025B	$3.995B	$4.045B
YoY Change
Total Liabilities & Shareholders Equity	$35.10B	$34.44B	$34.70B
YoY Change	5.04%	-0.75%	6.45%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$76.90M	$88.81M	$45.21M
YoY Change	14.78%	96.42%	-45.75%
Depreciation, Depletion And Amortization	$16.40M	$18.40M	$18.30M
YoY Change	-19.61%	0.55%	-12.44%
Cash From Operating Activities	$165.5M	$133.9M	$137.0M
YoY Change	30.42%	-2.26%	-65.71%
INVESTING ACTIVITIES
Capital Expenditures	-$18.00M	-$14.60M	-$11.80M
YoY Change	-11.33%	23.73%	-40.4%
Acquisitions
YoY Change
Other Investing Activities	-$1.404B	-$396.5M	-$238.4M
YoY Change	-275.72%	66.32%	-137.66%
Cash From Investing Activities	-$1.422B	-$411.1M	-$250.2M
YoY Change	-282.59%	64.31%	-140.79%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	596.4M	190.6M	-785.7M
YoY Change	-145.75%	-124.26%	-3.06%
NET CHANGE
Cash From Operating Activities	165.5M	133.9M	137.0M
Cash From Investing Activities	-1.422B	-411.1M	-250.2M
Cash From Financing Activities	596.4M	190.6M	-785.7M
Net Change In Cash	-660.3M	-86.60M	-898.9M
YoY Change	66.03%	-90.37%	-544.12%
FREE CASH FLOW
Cash From Operating Activities	$165.5M	$133.9M	$137.0M
Capital Expenditures	-$18.00M	-$14.60M	-$11.80M
Free Cash Flow	$183.5M	$148.5M	$148.8M
YoY Change	24.66%	-0.2%	-64.51%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Local Phone Number LocalPhoneNumber	491-7500
	dei	Entity Central Index Key EntityCentralIndexKey	0000007789
	dei	Entity File Number EntityFileNumber	001-31343
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	150074324	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-31343
	dei	Entity Registrant Name EntityRegistrantName	Associated Banc-Corp
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WI
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	39-1098068
	dei	Entity Address Address Line1 EntityAddressAddressLine1	433 Main Street
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	City Area Code CityAreaCode	920
	dei	Entity Address City Or Town EntityAddressCityOrTown	Green Bay,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WI
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	54301
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	150074324	shares
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	asb	Capital Market Fees Net CapitalMarketFeesNet	22067000	USD
CY2021Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	10657000	USD
CY2020Q3	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	12636000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	42710000	USD
	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	31043000	USD
CY2021Q3	asb	Bankand Corporate Owned Life Insurance Income BankandCorporateOwnedLifeInsuranceIncome	2760000	USD
CY2020Q3	asb	Bankand Corporate Owned Life Insurance Income BankandCorporateOwnedLifeInsuranceIncome	3074000	USD
	asb	Bankand Corporate Owned Life Insurance Income BankandCorporateOwnedLifeInsuranceIncome	8551000	USD
	asb	Bankand Corporate Owned Life Insurance Income BankandCorporateOwnedLifeInsuranceIncome	9793000	USD
CY2021Q3	asb	Gains Losses On Sale Of Ppe And Other Assets GainsLossesOnSaleOfPPEAndOtherAssets	5228000	USD
CY2020Q3	asb	Gains Losses On Sale Of Ppe And Other Assets GainsLossesOnSaleOfPPEAndOtherAssets	-339000	USD
	asb	Gains Losses On Sale Of Ppe And Other Assets GainsLossesOnSaleOfPPEAndOtherAssets	10024000	USD
	asb	Gains Losses On Sale Of Ppe And Other Assets GainsLossesOnSaleOfPPEAndOtherAssets	156945000	USD
CY2021Q3	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	0	USD
CY2020Q3	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	7000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	-16000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	9222000	USD
CY2021Q3	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	0	USD
CY2020Q3	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	0	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	1038000	USD
	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	0	USD
CY2021Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2116000	USD
CY2020Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2232000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8176000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7321000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	82076000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	75545000	USD
	us-gaap	Noninterest Income NoninterestIncome	250862000	USD
	us-gaap	Noninterest Income NoninterestIncome	428342000	USD
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	107880000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	108567000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	318900000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	334117000	USD
CY2021Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	19927000	USD
CY2020Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	19666000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	60902000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	61639000	USD
CY2021Q3	us-gaap	Occupancy Net OccupancyNet	15814000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	17854000	USD
	us-gaap	Occupancy Net OccupancyNet	46649000	USD
	us-gaap	Occupancy Net OccupancyNet	48386000	USD
CY2021Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	6156000	USD
CY2020Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3626000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	15522000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	13007000	USD
CY2021Q3	us-gaap	Equipment Expense EquipmentExpense	5200000	USD
CY2020Q3	us-gaap	Equipment Expense EquipmentExpense	5399000	USD
	asb	Legal And Professional Fees LegalAndProfessionalFees	15809000	USD
	us-gaap	Equipment Expense EquipmentExpense	16199000	USD
	us-gaap	Equipment Expense EquipmentExpense	16150000	USD
CY2021Q3	asb	Legal And Professional Fees LegalAndProfessionalFees	4304000	USD
CY2020Q3	asb	Legal And Professional Fees LegalAndProfessionalFees	5591000	USD
	asb	Legal And Professional Fees LegalAndProfessionalFees	17495000	USD
CY2021Q3	asb	Loan And Foreclosure Costs LoanAndForeclosureCosts	1616000	USD
CY2020Q3	asb	Loan And Foreclosure Costs LoanAndForeclosureCosts	2118000	USD
	asb	Loan And Foreclosure Costs LoanAndForeclosureCosts	6508000	USD
	asb	Loan And Foreclosure Costs LoanAndForeclosureCosts	8842000	USD
CY2021Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	5000000	USD
CY2020Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3900000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	13350000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	14650000	USD
CY2021Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2203000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2253000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6642000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7939000	USD
CY2021Q3	asb	Loss On Prepayments Of Fhlb Advances LossOnPrepaymentsOfFHLBAdvances	0	USD
CY2020Q3	asb	Loss On Prepayments Of Fhlb Advances LossOnPrepaymentsOfFHLBAdvances	44650000	USD
	asb	Loss On Prepayments Of Fhlb Advances LossOnPrepaymentsOfFHLBAdvances	0	USD
CY2021Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	9793000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	13963000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	25547000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	37993000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	177892000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	227587000	USD
	us-gaap	Noninterest Expense NoninterestExpense	527713000	USD
	us-gaap	Noninterest Expense NoninterestExpense	603184000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	111870000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-12900000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	344259000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	243112000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23060000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-58114000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	70142000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3342000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	88809000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	45214000	USD
	us-gaap	Net Income Loss NetIncomeLoss	274117000	USD
	us-gaap	Net Income Loss NetIncomeLoss	239769000	USD
CY2021Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	4155000	USD
CY2020Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	5207000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	14236000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	13152000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84655000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	40007000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	259880000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	226618000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.70
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.69
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.46
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	150046000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	152440000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	151473000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	153175000	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	151143000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	153194000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	152701000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	153914000	shares
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	88809000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	45214000	USD
	us-gaap	Net Income Loss NetIncomeLoss	274117000	USD
	us-gaap	Net Income Loss NetIncomeLoss	239769000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-19827000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	5840000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-35829000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	53900000	USD
CY2021Q3	asb	Amortizationof Net Unrealized Gainon Availablefor Sale Securities Transferedto Heldtomaturity Securities AmortizationofNetUnrealizedGainonAvailableforSaleSecuritiesTransferedtoHeldtomaturitySecurities	-172000	USD
CY2020Q3	asb	Amortizationof Net Unrealized Gainon Availablefor Sale Securities Transferedto Heldtomaturity Securities AmortizationofNetUnrealizedGainonAvailableforSaleSecuritiesTransferedtoHeldtomaturitySecurities	-1296000	USD
	asb	Amortizationof Net Unrealized Gainon Availablefor Sale Securities Transferedto Heldtomaturity Securities AmortizationofNetUnrealizedGainonAvailableforSaleSecuritiesTransferedtoHeldtomaturitySecurities	-1335000	USD
	asb	Amortizationof Net Unrealized Gainon Availablefor Sale Securities Transferedto Heldtomaturity Securities AmortizationofNetUnrealizedGainonAvailableforSaleSecuritiesTransferedtoHeldtomaturitySecurities	-2628000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	7000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-16000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	9222000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-4975000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	1786000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	111000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-8548000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	11852000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-14681000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	5342000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-25930000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	35454000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	37000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	36000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	111000	USD
CY2021Q3	asb	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Amortized Gain Loss During Period Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansAmortizedGainLossDuringPeriodBeforeTax	-1346000	USD
CY2020Q3	asb	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Amortized Gain Loss During Period Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansAmortizedGainLossDuringPeriodBeforeTax	-1313000	USD
	asb	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Amortized Gain Loss During Period Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansAmortizedGainLossDuringPeriodBeforeTax	-3446000	USD
	asb	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Amortized Gain Loss During Period Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansAmortizedGainLossDuringPeriodBeforeTax	-2923000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	330000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	703000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	836000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1088000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	979000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	573000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2498000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1724000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-13702000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5916000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-23431000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	37178000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	75107000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	51130000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	250685000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	276948000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4090933000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	94301000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-16811000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	77490000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	10556000	USD
CY2021Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	27870000	USD
CY2021Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	5207000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3444000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	4127780000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	91007000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7082000	USD
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	98088000	USD
CY2021Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	7618000	USD
CY2021Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	27822000	USD
CY2021Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	4875000	USD
CY2021Q2	us-gaap	Preferred Stock Redemption Amount PreferredStockRedemptionAmount	65000000	USD
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5092000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	4110052000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	88809000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-13702000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	75107000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	455000	USD
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	30546000	USD
CY2021Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	4155000	USD
CY2021Q3	us-gaap	Preferred Stock Redemption Amount PreferredStockRedemptionAmount	99458000	USD
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3616000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	3994961000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	3922124000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	45838000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	16209000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	62046000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2896000	USD
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	28392000	USD
CY2020Q1	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	3801000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10744000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5916000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	51130000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	95000	USD
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	27875000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	3790471000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	148718000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15054000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	163772000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	173000	USD
CY2020Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	27889000	USD
CY2020Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	4144000	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	97129000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4939000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	4024457000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	45214000	USD
CY2020Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	5207000	USD
CY2020Q3	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	-208000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-12184000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-21748000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3502000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	4045433000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-82018000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	157009000	USD
	us-gaap	Depreciation Depreciation	36109000	USD
	us-gaap	Depreciation Depreciation	38707000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-12231000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	18481000	USD
	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	15624000	USD
	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	16416000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6642000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7939000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	25196000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	18988000	USD
	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-16000	USD
	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	9222000	USD
	asb	Gains Losses On Sales Of Ppe And Other Assets GainsLossesOnSalesOfPPEAndOtherAssets	10024000	USD
	asb	Gains Losses On Sales Of Ppe And Other Assets GainsLossesOnSalesOfPPEAndOtherAssets	156945000	USD
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	1038000	USD
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	32304000	USD
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	43889000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	1345158000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	1319034000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1348006000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1620777000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-11252000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	415000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-13287000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-12735000	USD
	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	24509000	USD
	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-32892000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	423060000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-804497000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	2170320000	USD
	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-82122000	USD
	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	133165000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-19940000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-58002000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-44366000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-49525000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	364141000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1985700000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1368124000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	250259000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	109824000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	9000	USD
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	84152000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	34337000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	34440000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	200000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	158743000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	626283000	USD
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	USD
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	144000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	927053000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	893157000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	243063000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	323175000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	18149000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	18457000	USD
	asb	Net Changein Tax Credit Investments NetChangeinTaxCreditInvestments	45655000	USD
	asb	Net Changein Tax Credit Investments NetChangeinTaxCreditInvestments	35630000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-31518000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-162040000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1572625000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1400162000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	2495229000	USD
	asb	Net Decrease In Deposits Due To Branch Sales NetDecreaseInDepositsDueToBranchSales	-31083000	USD
	asb	Net Decrease In Deposits Due To Branch Sales NetDecreaseInDepositsDueToBranchSales	0	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	70179000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-284655000	USD
	asb	Increase Decrease In Short Term Fhlb Advances IncreaseDecreaseInShortTermFHLBAdvances	0	USD
	asb	Increase Decrease In Short Term Fhlb Advances IncreaseDecreaseInShortTermFHLBAdvances	-520000000	USD
	asb	Repaymentof Fhlb Advance RepaymentofFHLBAdvance	18276000	USD
	asb	Repaymentof Fhlb Advance RepaymentofFHLBAdvance	966777000	USD
	asb	Proceedsfrom Fhlb Advance ProceedsfromFHLBAdvance	6576000	USD
	asb	Proceedsfrom Fhlb Advance ProceedsfromFHLBAdvance	4000000	USD
	asb	Proceeds From Paycheck Protection Program Loan Funding ProceedsFromPaycheckProtectionProgramLoanFunding	0	USD
	asb	Proceeds From Paycheck Protection Program Loan Funding ProceedsFromPaycheckProtectionProgramLoanFunding	1022217000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1056000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1044000	USD
	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	300000000	USD
	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	96921000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	18629000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	3165000	USD
	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	164458000	USD
	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	86238000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	84156000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	14236000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13152000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	767695000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1674484000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	969796000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	524918000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	716048000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	588744000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1685843000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1113663000	USD
	us-gaap	Interest Paid Net InterestPaidNet	69470000	USD
	us-gaap	Interest Paid Net InterestPaidNet	137423000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	56262000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	17682000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	33794000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	12599000	USD
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	11761000	USD
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	11495000	USD
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	10071000	USD
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	260856000	USD
	asb	Unsettled Trades To Purchase Securities UnsettledTradesToPurchaseSecurities	9855000	USD
	asb	Unsettled Trades To Purchase Securities UnsettledTradesToPurchaseSecurities	1000000	USD
CY2021Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets	0	USD
CY2020Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets	457878000	USD
CY2021Q3	asb	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Intangible Assets Including Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsIncludingGoodwill	0	USD
CY2020Q3	asb	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Intangible Assets Including Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsIncludingGoodwill	22150000	USD
CY2021Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	0	USD
CY2020Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	480028000	USD
CY2020Q1	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Purchase Price FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice	77221000	USD
CY2020Q1	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	3504000	USD
CY2020Q1	us-gaap	Financing Receivable Purchased With Credit Deterioration Discount Premium FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium	-951000	USD
CY2020Q1	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Par Value FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue	79774000	USD
CY2021Q1	us-gaap	Deposits Deposits	31000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	88809000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	45214000	USD
	us-gaap	Net Income Loss NetIncomeLoss	274117000	USD
	us-gaap	Net Income Loss NetIncomeLoss	239769000	USD
CY2021Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	4155000	USD
CY2020Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	5207000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	14236000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	13152000	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84655000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	40007000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	259880000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	226618000	USD
CY2021Q3	us-gaap	Dividends Common Stock DividendsCommonStock	30323000	USD
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	27676000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	85604000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	83607000	USD
CY2021Q3	asb	Unvested Share Based Payment Awards UnvestedShareBasedPaymentAwards	222000	USD
CY2020Q3	asb	Unvested Share Based Payment Awards UnvestedShareBasedPaymentAwards	199000	USD
	asb	Unvested Share Based Payment Awards UnvestedShareBasedPaymentAwards	634000	USD
	asb	Unvested Share Based Payment Awards UnvestedShareBasedPaymentAwards	549000	USD
CY2021Q3	us-gaap	Undistributed Earnings UndistributedEarnings	54109000	USD
CY2020Q3	us-gaap	Undistributed Earnings UndistributedEarnings	12133000	USD
	us-gaap	Undistributed Earnings UndistributedEarnings	173642000	USD
	us-gaap	Undistributed Earnings UndistributedEarnings	142462000	USD
CY2021Q3	asb	Undistributed Earnings Allocated To Common Shareholders UndistributedEarningsAllocatedToCommonShareholders	53716000	USD
CY2020Q3	asb	Undistributed Earnings Allocated To Common Shareholders UndistributedEarningsAllocatedToCommonShareholders	12045000	USD
	asb	Undistributed Earnings Allocated To Common Shareholders UndistributedEarningsAllocatedToCommonShareholders	172436000	USD
	asb	Undistributed Earnings Allocated To Common Shareholders UndistributedEarningsAllocatedToCommonShareholders	141426000	USD
CY2021Q3	asb	Undistributed Earnings Allocated To Unvested Share Based Payment Awards UndistributedEarningsAllocatedToUnvestedShareBasedPaymentAwards	393000	USD
CY2020Q3	asb	Undistributed Earnings Allocated To Unvested Share Based Payment Awards UndistributedEarningsAllocatedToUnvestedShareBasedPaymentAwards	87000	USD
	asb	Undistributed Earnings Allocated To Unvested Share Based Payment Awards UndistributedEarningsAllocatedToUnvestedShareBasedPaymentAwards	1206000	USD
	asb	Undistributed Earnings Allocated To Unvested Share Based Payment Awards UndistributedEarningsAllocatedToUnvestedShareBasedPaymentAwards	1036000	USD
CY2021Q3	asb	Undistributed Earnings Allocations UndistributedEarningsAllocations	54109000	USD
CY2020Q3	asb	Undistributed Earnings Allocations UndistributedEarningsAllocations	12133000	USD
	asb	Undistributed Earnings Allocations UndistributedEarningsAllocations	173642000	USD
	asb	Undistributed Earnings Allocations UndistributedEarningsAllocations	142462000	USD
CY2021Q3	asb	Distributed Earnings To Common Shareholders Basic DistributedEarningsToCommonShareholdersBasic	-30323000	USD
CY2020Q3	asb	Distributed Earnings To Common Shareholders Basic DistributedEarningsToCommonShareholdersBasic	-27676000	USD
	asb	Distributed Earnings To Common Shareholders Basic DistributedEarningsToCommonShareholdersBasic	-85604000	USD
	asb	Distributed Earnings To Common Shareholders Basic DistributedEarningsToCommonShareholdersBasic	-83607000	USD
CY2021Q3	asb	Undistributed Earnings Basic UndistributedEarningsBasic	53716000	USD
CY2020Q3	asb	Undistributed Earnings Basic UndistributedEarningsBasic	12045000	USD
	asb	Undistributed Earnings Basic UndistributedEarningsBasic	172436000	USD
	asb	Undistributed Earnings Basic UndistributedEarningsBasic	141426000	USD
CY2021Q3	asb	Common Shareholders Earnings Basic CommonShareholdersEarningsBasic	84039000	USD
CY2020Q3	asb	Common Shareholders Earnings Basic CommonShareholdersEarningsBasic	39721000	USD
	asb	Common Shareholders Earnings Basic CommonShareholdersEarningsBasic	258040000	USD
	asb	Common Shareholders Earnings Basic CommonShareholdersEarningsBasic	225032000	USD
CY2021Q3	asb	Distributed Earnings To Common Shareholders Diluted DistributedEarningsToCommonShareholdersDiluted	-30323000	USD
CY2020Q3	asb	Distributed Earnings To Common Shareholders Diluted DistributedEarningsToCommonShareholdersDiluted	-27676000	USD
	asb	Distributed Earnings To Common Shareholders Diluted DistributedEarningsToCommonShareholdersDiluted	-85604000	USD
	asb	Distributed Earnings To Common Shareholders Diluted DistributedEarningsToCommonShareholdersDiluted	-83607000	USD
CY2021Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	53716000	USD
CY2020Q3	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	12045000	USD
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	172436000	USD
	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	141426000	USD
CY2021Q3	asb	Common Shareholders Earnings Diluted CommonShareholdersEarningsDiluted	84039000	USD
CY2020Q3	asb	Common Shareholders Earnings Diluted CommonShareholdersEarningsDiluted	39721000	USD
	asb	Common Shareholders Earnings Diluted CommonShareholdersEarningsDiluted	258040000	USD
	asb	Common Shareholders Earnings Diluted CommonShareholdersEarningsDiluted	225032000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	150046000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	152440000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	151473000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	153175000	shares
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1096000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	754000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1228000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	739000	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	151143000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	153194000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	152701000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	153914000	shares
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.70
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.69
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.46
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0350
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0160
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2100
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y9M
	asb	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Per Share Fair Value Of Stock Options ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPerShareFairValueOfStockOptions	2.39
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	6473000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.77
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y2M23D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2005000	USD
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1116000	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.36
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	97000	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	22.61
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5260000	shares
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.44
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y3D
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CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	41396000	USD
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CY2021Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	3872150000	USD
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CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	313096000	USD
CY2020Q4	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	27	security
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CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	192720000	USD
CY2020Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	16	security
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2885000	USD
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	178681000	USD
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CY2020Q4	us-gaap	Financing Receivable Revolving Converted To Term Loan FinancingReceivableRevolvingConvertedToTermLoan	69246000	USD
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CY2021Q3	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	USD
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	USD
CY2021Q3	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	11000000	USD
CY2020Q4	asb	Financing Receivable Not Past Due Status FinancingReceivableNotPastDueStatus	24202209000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	210854000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	24451724000	USD
CY2020Q4	asb	Nonaccrual Loans Current Portion NonaccrualLoansCurrentPortion	128000000	USD
CY2020Q4	asb	Percent Of Current Nonaccrual Loans PercentOfCurrentNonaccrualLoans	0.61
CY2020	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	USD
CY2020Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	28000000	USD
CY2021Q3	asb	Performing Restructured Loans PerformingRestructuredLoans	44499000	USD
CY2021Q3	asb	Nonaccrual Restructured Loans NonaccrualRestructuredLoans	15226000	USD
CY2020Q4	asb	Performing Restructured Loans PerformingRestructuredLoans	52092000	USD
CY2020Q4	asb	Nonaccrual Restructured Loans NonaccrualRestructuredLoans	20190000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	14000000	USD
CY2021Q3	asb	Restructured Loans Subsequently Accruing RestructuredLoansSubsequentlyAccruing	7000000	USD
CY2021Q3	asb	Ytd Restructured Loans Still On Nonaccrual YtdRestructuredLoansStillOnNonaccrual	7000000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	70	loan
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	13670000	USD
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	13744000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	57	loan
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8800000	USD
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	9280000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	2	loan
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	200000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	9	loan
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1244000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	1100000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1100000000	USD
CY2020Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	18006000	USD
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	59967000	USD
CY2019Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	67607000	USD
	asb	Msr Additionfrom Business Combination MSRAdditionfromBusinessCombination	0	USD
CY2020	asb	Msr Additionfrom Business Combination MSRAdditionfromBusinessCombination	1357000	USD
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	11761000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	13667000	USD
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	15624000	USD
CY2020	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	22664000	USD
CY2021Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	56104000	USD
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	59967000	USD
CY2020Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	18006000	USD
CY2019Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	302000	USD
	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	-12231000	USD
CY2020	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Provisions Recoveries ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisionsRecoveries	17704000	USD
CY2021Q3	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	5775000	USD
CY2021Q3	asb	Servicing Asset At Amortized Value Net ServicingAssetAtAmortizedValueNet	50329000	USD
CY2020Q4	asb	Servicing Asset At Amortized Value Net ServicingAssetAtAmortizedValueNet	41961000	USD
CY2021Q3	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	50373000	USD
CY2020Q4	us-gaap	Servicing Asset At Amortized Value Fair Value ServicingAssetAtAmortizedValueFairValue	41990000	USD
CY2021Q3	asb	Portfolio Of Residential Mortgage Loans Serviced For Others PortfolioOfResidentialMortgageLoansServicedForOthers	7057130000	USD
CY2020Q4	asb	Portfolio Of Residential Mortgage Loans Serviced For Others PortfolioOfResidentialMortgageLoansServicedForOthers	7743956000	USD
CY2021Q3	asb	Mortgage Servicing Rights Net To Servicing Portfolio MortgageServicingRightsNetToServicingPortfolio	0.0071
CY2020Q4	asb	Mortgage Servicing Rights Net To Servicing Portfolio MortgageServicingRightsNetToServicingPortfolio	0.0054
CY2021Q3	asb	Mortgage Servicing Rights Expense MortgageServicingRightsExpense	3393000	USD
CY2020Q4	asb	Mortgage Servicing Rights Expense MortgageServicingRightsExpense	40369000	USD
CY2021Q3	us-gaap	Federal Funds Purchased FederalFundsPurchased	415000	USD
CY2020Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	7070000	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	267528000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	185901000	USD
CY2021Q3	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	267943000	USD
CY2020Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	192971000	USD
CY2021Q3	us-gaap	Commercial Paper CommercialPaper	54553000	USD
CY2020Q4	us-gaap	Commercial Paper CommercialPaper	59346000	USD
CY2021Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	322496000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	252317000	USD
CY2021Q3	us-gaap	Subordinated Debt SubordinatedDebt	250000000	USD
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	250000000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	72000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1128000	USD
CY2021Q3	asb	Other Longterm Debtand Capitalized Costs OtherLongtermDebtandCapitalizedCosts	912000	USD
CY2020Q4	asb	Other Longterm Debtand Capitalized Costs OtherLongtermDebtandCapitalizedCosts	1663000	USD
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	1620880000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	1632723000	USD
CY2021Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	1870040000	USD
CY2020Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	2182188000	USD
CY2021Q3	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	2192536000	USD
CY2020Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	2434505000	USD
CY2021Q3	us-gaap	Carrying Value Of Securities Purchased Under Agreements To Resell And Deposits Paid For Securities Borrowed CarryingValueOfSecuritiesPurchasedUnderAgreementsToResellAndDepositsPaidForSecuritiesBorrowed	364000000	USD
CY2021Q3	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	267528000	USD
CY2020Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	185901000	USD
CY2021Q3	asb	Fixed Interest Rates Finance Leases FixedInterestRatesFinanceLeases	0.0107
CY2021Q3	asb	Expense Relatedto Qualified Affordable Housing Projects ExpenseRelatedtoQualifiedAffordableHousingProjects	8000000	USD
CY2021Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	78000000	USD
CY2020Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	72000000	USD
CY2021Q3	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	18000000	USD
CY2020Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	31000000	USD
	asb	Asbc Balancesheetoffsettingofderivativeassetsandliabilitiestabletextblock Asbc_balancesheetoffsettingofderivativeassetsandliabilitiestabletextblock	The following table presents the interest rate, commodity, and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest, commodity and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from this table:<table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.098%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.350%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.350%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.350%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.352%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr style="height:29pt"><td colspan="3" style="background-color:#00a94f;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> </span></td><td colspan="3" rowspan="2" style="background-color:#00a94f;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross Amounts Recognized</span></td><td colspan="6" style="background-color:#00a94f;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets</span></td><td colspan="3" rowspan="2" style="background-color:#00a94f;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Net Amounts Presented on the Consolidated Balance Sheets</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr style="height:21pt"><td colspan="3" style="background-color:#00a94f;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> ($ in Thousands)</span></td><td colspan="3" style="background-color:#00a94f;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Derivative <br/>Liabilities Offset</span></td><td colspan="3" style="background-color:#00a94f;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Cash Collateral Received</span></td><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Derivative assets</span></td><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2021</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">6,719</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(3,302)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(3,143)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">273</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#dddddd;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">December 31, 2020</span></td><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">13,441 </span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(1,936)</span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(10,879)</span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">626 </span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr style="height:9pt"><td colspan="15" style="padding:0 1pt"/></tr><tr style="height:29pt"><td colspan="3" style="background-color:#00a94f;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> </span></td><td colspan="3" rowspan="2" style="background-color:#00a94f;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross Amounts Recognized</span></td><td colspan="6" style="background-color:#00a94f;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets</span></td><td colspan="3" rowspan="2" style="background-color:#00a94f;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Net Amounts Presented on the Consolidated Balance Sheets</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr style="height:21pt"><td colspan="3" style="background-color:#00a94f;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"> ($ in Thousands)</span></td><td colspan="3" style="background-color:#00a94f;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Derivative <br/>Assets Offset</span></td><td colspan="3" style="background-color:#00a94f;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#ffffff;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Cash Collateral Pledged</span></td><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Derivative liabilities</span></td><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#dddddd;border-top:2pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2021</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">23,489</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(3,302)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(18,595)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">1,592</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#dddddd;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">December 31, 2020</span></td><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">27,951 </span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(1,936)</span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(25,625)</span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="2" style="background-color:#dddddd;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">390 </span></td><td style="background-color:#dddddd;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/></tr></table>
CY2020Q4	asb	Lending Related Commitments Fair Value LendingRelatedCommitmentsFairValue	0	USD
CY2021Q3	asb	Lending Related Commitments Fair Value LendingRelatedCommitmentsFairValue	0	USD
CY2020Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	47776000	USD
CY2019Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	21907000	USD
CY2020Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	47776000	USD
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-6500000	USD
CY2020	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	7000000	USD
CY2021Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	41276000	USD
CY2020Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	47776000	USD
	asb	Expense Relatedto Qualified Affordable Housing Projects ExpenseRelatedtoQualifiedAffordableHousingProjects	24000000	USD
	asb	Expense Relatedto Qualified Affordable Housing Projects ExpenseRelatedtoQualifiedAffordableHousingProjects	18000000	USD
CY2020Q3	asb	Expense Relatedto Qualified Affordable Housing Projects ExpenseRelatedtoQualifiedAffordableHousingProjects	6000000	USD
CY2021Q3	asb	Remaining Investmentin Qualified Affordable Housing Projects RemainingInvestmentinQualifiedAffordableHousingProjects	270000000	USD
CY2020Q4	asb	Remaining Investmentin Qualified Affordable Housing Projects RemainingInvestmentinQualifiedAffordableHousingProjects	268000000	USD
CY2021Q3	asb	Variable Interest Entity Reporting Entity Involvement Unfunded Obligation Amount VariableInterestEntityReportingEntityInvolvementUnfundedObligationAmount	101000000	USD
CY2020Q4	asb	Variable Interest Entity Reporting Entity Involvement Unfunded Obligation Amount VariableInterestEntityReportingEntityInvolvementUnfundedObligationAmount	118000000	USD
CY2020	asb	Qualified Affordable Housing Investments Impairment Loss QualifiedAffordableHousingInvestmentsImpairmentLoss	0	USD
	asb	Qualified Affordable Housing Investments Impairment Loss QualifiedAffordableHousingInvestmentsImpairmentLoss	0	USD
CY2021Q3	asb	Loans Repurchased Under Make Whole Requests LoansRepurchasedUnderMakeWholeRequests	6000000	USD
CY2020Q4	asb	Loans Repurchased Under Make Whole Requests LoansRepurchasedUnderMakeWholeRequests	10000000	USD
	asb	Loans Sold To Outside Investors Loss Reimbursement Settlement Paid LoansSoldToOutsideInvestorsLossReimbursementSettlementPaid	114
CY2021Q1	asb	Loans Sold To Outside Investors Loss Reimbursement Settlement Paid LoansSoldToOutsideInvestorsLossReimbursementSettlementPaid	no
CY2021Q3	asb	Loans Sold To Outside Investors Original Amount LoansSoldToOutsideInvestorsOriginalAmount	15700000000	USD
CY2021Q3	asb	Loans Sold To Outside Investors Remaining Outstanding Amount LoansSoldToOutsideInvestorsRemainingOutstandingAmount	6500000000	USD
CY2021Q3	asb	Mortgage Repurchase Reserve MortgageRepurchaseReserve	1000000	USD
CY2020Q4	asb	Mortgage Repurchase Reserve MortgageRepurchaseReserve	2000000	USD
CY2021Q3	asb	Residential Mortgage Loans Sold With Recourse Risk ResidentialMortgageLoansSoldWithRecourseRisk	27000000	USD
CY2020Q4	asb	Residential Mortgage Loans Sold With Recourse Risk ResidentialMortgageLoansSoldWithRecourseRisk	36000000	USD
CY2021Q3	asb	Residential Mortgage Loans Sold With Credit Recourse Risk ResidentialMortgageLoansSoldWithCreditRecourseRisk	26000000	USD
CY2020Q4	asb	Residential Mortgage Loans Sold With Credit Recourse Risk ResidentialMortgageLoansSoldWithCreditRecourseRisk	33000000	USD
	asb	Fair Value Inputs Closing Ratio FairValueInputsClosingRatio	0.82
	asb	Equity Securities Without Readily Determinable Fair Value Additions Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAdditionsAnnualAmount	552000	USD
	asb	Equity Securities Without Readily Determinable Fair Value Sales Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAnnualAmount	-33000	USD
	asb	Equity Securities Without Readily Determinable Fair Value Donations Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDonationsAnnualAmount	-134000	USD
CY2021Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	378927000	USD
CY2021Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	378927000	USD
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	416154000	USD
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	416154000	USD
CY2021Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	1281916000	USD
CY2021Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	1281916000	USD
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	298759000	USD
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	298759000	USD
CY2021Q3	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	25000000	USD
CY2021Q3	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	25000000	USD
CY2020Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	1135000	USD
CY2020Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	1135000	USD
CY2021Q3	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	168281000	USD
CY2021Q3	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	168281000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	168280000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	168280000	USD
CY2021Q3	asb	Residential Loans Receivable Heldforsale Net Not Partof Disposal Group ResidentialLoansReceivableHeldforsaleNetNotPartofDisposalGroup	158202000	USD
CY2021Q3	asb	Residential Loans Receivable Heldforsale Net Not Partof Disposal Group ResidentialLoansReceivableHeldforsaleNetNotPartofDisposalGroup	158202000	USD
CY2020Q4	asb	Residential Loans Receivable Heldforsale Net Not Partof Disposal Group ResidentialLoansReceivableHeldforsaleNetNotPartofDisposalGroup	129158000	USD
CY2020Q4	asb	Residential Loans Receivable Heldforsale Net Not Partof Disposal Group ResidentialLoansReceivableHeldforsaleNetNotPartofDisposalGroup	129158000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	23330676000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	24068022000	USD
CY2021Q3	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	683610000	USD
CY2021Q3	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	683610000	USD
CY2020Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	679647000	USD
CY2020Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	679647000	USD
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	1620880000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	1632723000	USD
CY2021Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	264000000	USD
CY2020Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	279000000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
	asb	Netintersegmentinterestincomeexpense Netintersegmentinterestincomeexpense	0	USD
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	183675000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	182150000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	539092000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	574964000	USD
CY2021Q3	asb	Netintersegmentinterestincomeexpense Netintersegmentinterestincomeexpense	0	USD
CY2020Q3	asb	Netintersegmentinterestincomeexpense Netintersegmentinterestincomeexpense	0	USD
	asb	Netintersegmentinterestincomeexpense Netintersegmentinterestincomeexpense	0	USD
CY2021Q3	asb	Segmentnetinterestincome Segmentnetinterestincome	183675000	USD
CY2020Q3	asb	Segmentnetinterestincome Segmentnetinterestincome	182150000	USD
	asb	Segmentnetinterestincome Segmentnetinterestincome	539092000	USD
	asb	Segmentnetinterestincome Segmentnetinterestincome	574964000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	82076000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	75545000	USD
	us-gaap	Noninterest Income NoninterestIncome	250862000	USD
	us-gaap	Noninterest Income NoninterestIncome	428342000	USD
CY2021Q3	us-gaap	Revenues Revenues	265752000	USD
CY2020Q3	us-gaap	Revenues Revenues	257695000	USD
	us-gaap	Revenues Revenues	789954000	USD
	us-gaap	Revenues Revenues	1003305000	USD
CY2021Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-24010000	USD
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	43009000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-82018000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	157009000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	177892000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	227587000	USD
	us-gaap	Noninterest Expense NoninterestExpense	527713000	USD
	us-gaap	Noninterest Expense NoninterestExpense	603184000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	111870000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-12900000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	344259000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	243112000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23060000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-58114000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	70142000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3342000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	88809000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	45214000	USD
	us-gaap	Net Income Loss NetIncomeLoss	274117000	USD
	us-gaap	Net Income Loss NetIncomeLoss	239769000	USD
	asb	Allocated Goodwill Segment AllocatedGoodwillSegment	1104992000	USD
	asb	Allocated Goodwill Segment AllocatedGoodwillSegment	1107902000	USD
CY2021Q3	asb	Noninterest Income In Scopeof Topic606 NoninterestIncomeInScopeofTopic606	53099000	USD
CY2020Q3	asb	Noninterest Income In Scopeof Topic606 NoninterestIncomeInScopeofTopic606	49243000	USD
	asb	Noninterest Income In Scopeof Topic606 NoninterestIncomeInScopeofTopic606	158383000	USD
	asb	Noninterest Income In Scopeof Topic606 NoninterestIncomeInScopeofTopic606	187524000	USD
CY2021Q3	asb	Noninterest Income Outsideof Scopeof Topic606 NoninterestIncomeOutsideofScopeofTopic606	28977000	USD
CY2020Q3	asb	Noninterest Income Outsideof Scopeof Topic606 NoninterestIncomeOutsideofScopeofTopic606	26303000	USD
	asb	Noninterest Income Outsideof Scopeof Topic606 NoninterestIncomeOutsideofScopeofTopic606	92479000	USD
	asb	Noninterest Income Outsideof Scopeof Topic606 NoninterestIncomeOutsideofScopeofTopic606	240818000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	82076000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	75545000	USD
	us-gaap	Noninterest Income NoninterestIncome	250862000	USD
	us-gaap	Noninterest Income NoninterestIncome	428342000	USD
CY2021Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	2367000	USD
CY2020Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	3970000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	6850000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	31994000	USD
CY2021Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	59000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	9224000	USD
CY2021Q3	asb	Finance Lease Cost FinanceLeaseCost	17000	USD
CY2020Q3	asb	Finance Lease Cost FinanceLeaseCost	39000	USD
	asb	Finance Lease Cost FinanceLeaseCost	76000	USD
	asb	Finance Lease Cost FinanceLeaseCost	115000	USD
CY2021Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	2858000	USD
CY2020Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	2871000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	8598000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	8303000	USD
CY2021Q3	asb	Finance Lease Payments FinanceLeasePayments	21000	USD
CY2020Q3	asb	Finance Lease Payments FinanceLeasePayments	40000	USD
	asb	Finance Lease Payments FinanceLeasePayments	101000	USD
	asb	Finance Lease Payments FinanceLeasePayments	82000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	29527000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	962000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	33066000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	36425000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	72000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1128000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	36696000	USD
CY2021Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y11M19D
CY2021Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0321
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	40806000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y5M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0327
CY2021Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	73000	USD
CY2021Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P0Y11M1D
CY2021Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0107
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	1145000	USD
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y7M24D
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0105
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	2326000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	21000	USD
CY2021Q3	asb	Lease Liability To Be Paid Remainder Of Fiscal Year LeaseLiabilityToBePaidRemainderOfFiscalYear	2348000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	8061000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	51000	USD
CY2021Q3	asb	Lease Liability To Be Paid Due Year One LeaseLiabilityToBePaidDueYearOne	8112000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	6108000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	0	USD
CY2021Q3	asb	Lease Liability To Be Paid Due Year Two LeaseLiabilityToBePaidDueYearTwo	6108000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5317000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	0	USD
CY2021Q3	asb	Lease Liability To Be Paid Due Year Three LeaseLiabilityToBePaidDueYearThree	5317000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4076000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	USD
CY2021Q3	asb	Lease Liability To Be Paid Due Year Four LeaseLiabilityToBePaidDueYearFour	4076000	USD
CY2021Q3	asb	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	10807000	USD
CY2021Q3	asb	Finance Lease Liability To Be Paid After Year Four FinanceLeaseLiabilityToBePaidAfterYearFour	0	USD
CY2021Q3	asb	Lease Liability To Be Paid Due After Year Four LeaseLiabilityToBePaidDueAfterYearFour	10807000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	36696000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	73000	USD
CY2021Q3	asb	Lease Liability Payments Due Total LeaseLiabilityPaymentsDueTotal	36768000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3630000	USD
CY2021Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	0	USD
CY2021Q3	asb	Lease Liability Undiscounted Excess Amount LeaseLiabilityUndiscountedExcessAmount	3630000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	33066000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	72000	USD
CY2021Q3	asb	Lease Liability LeaseLiability	33138000	USD
CY2021Q3	asb	Lessee Operating Lease Lease Notyet Commenced Liability LesseeOperatingLeaseLeaseNotyetCommencedLiability	16000000	USD
CY2020Q4	asb	Lessee Operating Lease Lease Notyet Commenced Liability LesseeOperatingLeaseLeaseNotyetCommencedLiability	17000000	USD

Files In Submission

Name	View Source	Status
0000007789-21-000073-index-headers.html	Edgar Link	pending
0000007789-21-000073-index.html	Edgar Link	pending
0000007789-21-000073.txt	Edgar Link	pending
0000007789-21-000073-xbrl.zip	Edgar Link	pending
asb-20210930.htm	Edgar Link	pending
asb-20210930.xsd	Edgar Link	pending
asb-20210930_cal.xml	Edgar Link	unprocessable
asb-20210930_def.xml	Edgar Link	unprocessable
asb-20210930_htm.xml	Edgar Link	completed
asb-20210930_lab.xml	Edgar Link	unprocessable
asb-20210930_pre.xml	Edgar Link	unprocessable
asb09302021ex311.htm	Edgar Link	pending
asb09302021ex312.htm	Edgar Link	pending
asb09302021ex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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2021 Q4 Form 10-Q Financial Statement

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$ASB ASSOCIATED BANC-CORP Stock $asb

2021 Q4 Form 10-Q Financial Statement

#000000778921000073 Filed on October 28, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ASB
ASSOCIATED BANC-CORP Stock $asb