XML 52 R115.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

EMPLOYEE BENEFITS AND STOCK BASED COMPENSATION (Estimated Unamortized Compensation Expense Recognized in Future) (Details) $ in Thousands | Dec. 31, 2019 USD ($)
--- | ---
Estimated unamortized compensation expense recognized in future |
2020 | $ 6,436
2021 | 4,186
2022 | 652
2023 | 100
Total | 11,374
Restricted Stock |
Estimated unamortized compensation expense recognized in future |
2020 | 5,030
2021 | 3,299
2022 | 652
2023 | 100
Total | 9,081
Performance Stock |
Estimated unamortized compensation expense recognized in future |
2020 | 1,406
2021 | 887
2022 | 0
2023 | 0
Total | $ 2,293

X
- Definition Estimated unamortized compensation expense recognized in future. + References No definition available. + Details
Name: | aub_EstimatedUnamortizedCompensationExpenseRecognizedInFutureAbstract
Namespace Prefix: | aub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated unamortized compensation expense year four. + References No definition available. + Details
Name: | aub_EstimatedUnamortizedCompensationExpenseYearFour
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Estimated unamortized compensation expense year one. + References No definition available. + Details
Name: | aub_EstimatedUnamortizedCompensationExpenseYearOne
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Estimated unamortized compensation expense year three. + References No definition available. + Details
Name: | aub_EstimatedUnamortizedCompensationExpenseYearThree
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Estimated unamortized compensation expense year two. + References No definition available. + Details
Name: | aub_EstimatedUnamortizedCompensationExpenseYearTwo
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |