XML 84 R69.htm IDEA: XBRL DOCUMENT
v3.25.1

Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Interest Income [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Gain (Loss) on Fair Value Hedges Recognized in Earnings | $ (1,149) | $ (4,863)
Interest Income [Member] | Fair Value Hedging [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge | (32) | (40)
Interest Income [Member] | Designated as Hedging Instrument |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments | (1,118) | (4,823)
Interest Expense |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Gain (Loss) on Fair Value Hedges Recognized in Earnings | 2,219 | 5,322
Interest Expense | Fair Value Hedging [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge | 6,997 | (10,210)
Interest Expense | Designated as Hedging Instrument |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments | (4,778) | 15,532
Capital Market Fees [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Gain (Loss) on Fair Value Hedges Recognized in Earnings | 1 | 0
Capital Market Fees [Member] | Fair Value Hedging [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Increase (Decrease) in Fair Value of Hedged Item in Foreign Currency Fair Value Hedge | 553 | (9,070)
Capital Market Fees [Member] | Designated as Hedging Instrument |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Increase (Decrease) in Fair Value of Foreign Currency Fair Value Hedging Instruments | $ (551) | $ 9,070

X
- Definition Increase (Decrease) in Fair Value of Foreign Currency Fair Value Hedging Instruments + References No definition available. + Details
Name: | asb_IncreaseDecreaseInFairValueOfForeignCurrencyFairValueHedgingInstruments
Namespace Prefix: | asb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase (Decrease) in Fair Value of Hedged Item in Foreign Currency Fair Value Hedge + References No definition available. + Details
Name: | asb_IncreaseDecreaseInFairValueOfHedgedItemInForeignCurrencyFairValueHedge
Namespace Prefix: | asb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C + Details
Name: | us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized gain (loss) included in earnings related to the fair value of the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C + Details
Name: | us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C + Details
Name: | us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_InterestIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_InterestExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=asb_CapitalMarketFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |