XML 110 R91.htm IDEA: XBRL DOCUMENT
v3.20.4

BORROWINGS (Contractual Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Premium (Discount) |  |
2021 | $ (1,008) |
2022 | (1,030) |
2023 | (1,053) |
2024 | (1,078) |
2025 | (1,102) |
Thereafter | (10,059) |
Total Long-term borrowings | (15,330) | $ (16,164)
Total Long-term Borrowings |  |
2021 | (1,008) |
2022 | (1,030) |
2023 | (1,053) |
2024 | (1,078) |
2025 | (1,102) |
Thereafter | 495,100 |
Total Long-term Borrowings | 489,829 | $ 1,077,495
Trust Preferred Capital Notes |  |
Total Long-term Borrowings, Gross |  |
2021 | 0 |
2022 | 0 |
2023 | 0 |
2024 | 0 |
2025 | 0 |
Thereafter | 155,159 |
Total Long-term borrowings | 155,159 |
Subordinated Debt |  |
Total Long-term Borrowings, Gross |  |
2021 | 0 |
2022 | 0 |
2023 | 0 |
2024 | 0 |
2025 | 0 |
Thereafter | 150,000 |
Total Long-term borrowings | 150,000 |
FHLB Advances |  |
Total Long-term Borrowings, Gross |  |
2021 | 0 |
2022 | 0 |
2023 | 0 |
2024 | 0 |
2025 | 0 |
Thereafter | 200,000 |
Total Long-term borrowings | $ 200,000 |

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentOfPrincipalInNextTwelveMonths
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentOfPrincipalInYearFive
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentOfPrincipalInYearFour
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentOfPrincipalInYearThree
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentOfPrincipalInYearTwo
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal After Year Five, Fair Value Discount (Premium) + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFiveFairValueDiscountPremium
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal After Year Five, Gross + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFiveGross
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long Term Debt Maturities, Repayments Of Principal in The Next Twelve Months, Fair Value Discount (Premium) + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonthsFairValueDiscountPremium
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal in The Next Twelve Months, Gross + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonthsGross
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Five, Fair Value Discount (Premium) + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFiveFairValueDiscountPremium
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Five, Gross + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFiveGross
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Four, Fair Value Discount (Premium) + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFourFairValueDiscountPremium
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Four, Gross + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFourGross
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Three, Fair Value Discount (Premium) + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThreeFairValueDiscountPremium
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Three, Gross + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThreeGross
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Two, Fair Value Discount (Premium) + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwoFairValueDiscountPremium
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term Debt, Maturities, Repayments Of Principal In Year Two, Gross + References No definition available. + Details
Name: | aub_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwoGross
Namespace Prefix: | aub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt discount (premium). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28567-108399 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=aub_TrustPreferredCapitalNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_FederalHomeLoanBankAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |