XML 104 R86.htm IDEA: XBRL DOCUMENT
v3.25.0.1

DEPOSITS (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deposits, Interest-bearing and Noninterest-bearing, Alternative [Abstract] |  |
Time deposits included in total brokered deposits | $ 751.0 | $ 378.1
Deposit overdrafts as other commercial/consumer loans | $ 2.8 | $ 2.2

X
- Definition Amount of time deposits included in brokered deposits as of the reporting date. + References No definition available. + Details
Name: | aub_BrokeredTimeDeposits
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deposit overdraft. + References No definition available. + Details
Name: | aub_DepositOverdraft
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DepositsInterestBearingAndNoninterestBearingAlternativeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration