XML 168 R54.htm IDEA: XBRL DOCUMENT
v3.25.2

LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Troubled Loan Modifications) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 18,091 | $ 23,920 | $ 20,232 | $ 24,096
Term Extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | 6,026 |  | 6,859 |
Term Extension | CRE - Owner Occupied |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 1,244 |  | $ 1,546 |
% of Total Class of Financing Receivable | 0.03% |  | 0.04% |
Weighted-average years added to life of loan | 6 months |  |  |
Term Extension | Residential 1-4 Family - Mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 196 |  | $ 395 |
% of Total Class of Financing Receivable | 0.01% |  | 0.01% |
Weighted-average years added to life of loan | 9 months 18 days |  |  |
Term Extension | Residential 1-4 Family - Commercial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 4,586 |  | $ 4,918 |
% of Total Class of Financing Receivable | 0.41% |  | 0.43% |
Weighted-average years added to life of loan | 9 months 18 days |  |  |
Other Than Insignificant Payment Delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 11,364 |  | $ 11,364 |
Other Than Insignificant Payment Delay | Commercial and Industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 7,584 |  | $ 7,584 |
% of Total Class of Financing Receivable | 0.15% |  | 0.15% |
Other Than Insignificant Payment Delay | CRE - Non-Owner Occupied |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 3,780 |  | $ 3,780 |
% of Total Class of Financing Receivable | 0.05% |  | 0.05% |
Combination - Other-Than-Insignificant Payment Delay and Term Extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 0 | 23,504 | $ 478 | 23,504
Combination - Other-Than-Insignificant Payment Delay and Term Extension | Commercial and Industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 0 | $ 1,153 | $ 478 | $ 1,153
% of Total Class of Financing Receivable | 0.00% | 0.03% | 0.01% | 0.03%
Weighted-average years added to life of loan |  | 1 year |  | 1 year
Combination - Other-Than-Insignificant Payment Delay and Term Extension | CRE - Non-Owner Occupied |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost |  | $ 22,351 |  | $ 22,351
% of Total Class of Financing Receivable |  | 0.46% |  | 0.46%
Weighted-average years added to life of loan |  |  |  | 1 year 7 months 6 days
Combination - Term Extension and Interest Rate Reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 701 | $ 210 | $ 1,531 | $ 386
Combination - Term Extension and Interest Rate Reduction | Residential 1-4 Family - Mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost | $ 701 | $ 210 | $ 1,531 | $ 386
% of Total Class of Financing Receivable | 0.03% | 0.02% | 0.06% | 0.03%
Weighted-average years added to life of loan |  |  | 1 year 7 months 6 days |
Weighted-average contractual interest rate before loan modification |  |  | 5.00% |
Weighted-average contractual interest rate after loan modification |  |  | 2.10% |
Combination - Interest Rate Reduction, Term Extension and Other-Than-Insignificant Pmy Delay |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost |  | $ 206 |  | $ 206
Combination - Interest Rate Reduction, Term Extension and Other-Than-Insignificant Pmy Delay | Commercial and Industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized Cost |  | $ 206 |  | $ 206
% of Total Class of Financing Receivable |  | 0.01% |  | 0.01%
Combination - Interest Rate Reduction, Term Extension and Other-Than-Insignificant Pmy Delay | CRE - Non-Owner Occupied |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average years added to life of loan |  | 1 year 7 months 6 days |  |

X
- Definition Weighted-average interest rate, after troubled debt restructuring, of modified financing receivable. + References No definition available. + Details
Name: | aub_FinancingReceivableTroubledDebtRestructuringWeightedAverageInterestRatePostModification
Namespace Prefix: | aub_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted-average interest rate, before troubled debt restructuring, of financing receivable to be modified. + References No definition available. + Details
Name: | aub_FinancingReceivableTroubledDebtRestructuringWeightedAverageInterestRatePreModification
Namespace Prefix: | aub_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-34 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A + Details
Name: | us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aub_CommercialRealEstateOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aub_Residential1To4FamilyConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aub_Residential1To4FamilyCommercialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=aub_OtherThanInsignificantPaymentDelayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aub_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aub_CommercialRealEstateNonOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=aub_OtherThanInsignificantPaymentDelayAndTermExtensionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=aub_ExtendedMaturityAndContractualInterestRateReductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=aub_ExtendedMaturityContractualInterestRateReductionAndOtherThanInsignificantPaymentDelayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |