XML 63 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Summary of Significant Accounting Policies textuals (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Expense Reclass (asu 2017-07) |  | $ 9,000
Visa Restricted Stock Owned |  | 119
AOCI Attributable to Parent [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Reporting Comprehensive Income(2018-02) | $ 13,654 | $ 13,654

X
- Definition Expense Relcass (asu 2017-07) + References No definition available. + Details
Name: | asb_ExpenseRelcassasu201707
Namespace Prefix: | asb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reporting Comprehensive Income(2018-02) + References No definition available. + Details
Name: | asb_ReportingComprehensiveIncome201802
Namespace Prefix: | asb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Visa Restricted Stock Owned + References No definition available. + Details
Name: | asb_VisaRestrictedStockOwned
Namespace Prefix: | asb_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |