XML 42 R32.htm IDEA: XBRL DOCUMENT
v3.23.1

Loan Credit Quality Analysis (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 2,680 | $ 2,731 |
2023 | 34,996 |  |
2022 | 183,353 |  |
2021 | 90,751 |  |
2020 | 62,057 |  |
2019 | 42,905 |  |
Prior | 77,452 |  |
Revolving Loans | 13,527 |  |
Total loans | 505,041 | 504,458 | $ 428,931
Financing Receivable Excluding Accrued Interest Year Two Originated Current Fiscal Year Writeoff | 6 |  |
Financing Receivable Excluding Accrued Interest Year Three Originated Current Fiscal Year Writeoff | 5 |  |
FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff | 11 |  |
Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 34,922 |  |
2022 | 183,228 |  |
2021 | 90,466 |  |
2020 | 61,644 |  |
2019 | 40,300 |  |
Prior | 76,371 |  |
Revolving Loans | 13,527 |  |
Total loans | 500,458 | 499,574 |
Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 235 |  |
2020 | 5 |  |
2019 | 0 |  |
Prior | 424 |  |
Revolving Loans | 0 |  |
Total loans | 664 | 898 |
Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 74 |  |
2022 | 125 |  |
2021 | 40 |  |
2020 | 408 |  |
2019 | 70 |  |
Prior | 522 |  |
Revolving Loans | 0 |  |
Total loans | 1,239 | 1,255 |
NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 10 |  |
2020 | 0 |  |
2019 | 2,535 |  |
Prior | 135 |  |
Revolving Loans | 0 |  |
Total loans | 2,680 |  |
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 432 | 443 |
2023 | 4,165 |  |
2022 | 10,873 |  |
2021 | 15,013 |  |
2020 | 6,155 |  |
2019 | 8,230 |  |
Prior | 8,630 |  |
Revolving Loans | 6,536 |  |
Total loans | 59,602 | 66,212 | 73,297
Commercial and Industrial Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 4,106 |  |
2022 | 10,873 |  |
2021 | 14,985 |  |
2020 | 6,152 |  |
2019 | 7,787 |  |
Prior | 8,630 |  |
Revolving Loans | 6,536 |  |
Total loans | 59,069 | 65,550 |
Commercial and Industrial Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 7 |
Commercial and Industrial Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 59 |  |
2022 | 0 |  |
2021 | 28 |  |
2020 | 3 |  |
2019 | 11 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 101 | 212 |
Commercial and Industrial Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 432 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 432 |  |
Construction And Land Development Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 9,319 |  |
2022 | 51,422 |  |
2021 | 3,226 |  |
2020 | 1,670 |  |
2019 | 151 |  |
Prior | 234 |  |
Revolving Loans | 478 |  |
Total loans | 66,500 | 66,479 | 33,058
Construction And Land Development Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 9,319 |  |
2022 | 51,422 |  |
2021 | 3,226 |  |
2020 | 1,670 |  |
2019 | 151 |  |
Prior | 234 |  |
Revolving Loans | 478 |  |
Total loans | 66,500 | 66,479 |
Construction And Land Development Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 0 |
Construction And Land Development Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 0 |
Construction And Land Development Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 |  |
Commercial Real Estate Owner Occupied Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,103 | 0 |
2023 | 4,294 |  |
2022 | 10,355 |  |
2021 | 19,544 |  |
2020 | 11,652 |  |
2019 | 7,352 |  |
Prior | 11,372 |  |
Revolving Loans | 2,711 |  |
Total loans | 67,280 | 61,125 |
Commercial Real Estate Owner Occupied Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 4,294 |  |
2022 | 10,250 |  |
2021 | 19,309 |  |
2020 | 11,652 |  |
2019 | 5,194 |  |
Prior | 11,372 |  |
Revolving Loans | 2,711 |  |
Total loans | 64,782 | 60,726 |
Commercial Real Estate Owner Occupied Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 235 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 235 | 238 |
Commercial Real Estate Owner Occupied Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 105 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 55 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 160 | 161 |
Commercial Real Estate Owner Occupied Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 2,103 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 2,103 |  |
Commercial Real Estate Hotel Motel [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 0 | 0 |
2023 | 0 |  |
2022 | 10,191 |  |
2021 | 3,294 |  |
2020 | 1,633 |  |
2019 | 4,090 |  |
Prior | 13,751 |  |
Revolving Loans | 0 |  |
Total loans | 32,959 | 33,378 |
Commercial Real Estate Hotel Motel [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 10,191 |  |
2021 | 3,294 |  |
2020 | 1,633 |  |
2019 | 4,090 |  |
Prior | 13,751 |  |
Revolving Loans | 0 |  |
Total loans | 32,959 | 33,378 |
Commercial Real Estate Hotel Motel [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 0 |
Commercial Real Estate Hotel Motel [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 0 |
Commercial Real Estate Hotel Motel [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 |  |
Commercial Real Estate Multifamily [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 0 | 0 |
2023 | 3,666 |  |
2022 | 19,375 |  |
2021 | 2,009 |  |
2020 | 7,158 |  |
2019 | 3,889 |  |
Prior | 3,299 |  |
Revolving Loans | 1,578 |  |
Total loans | 40,974 | 41,084 |
Commercial Real Estate Multifamily [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 3,666 |  |
2022 | 19,375 |  |
2021 | 2,009 |  |
2020 | 7,158 |  |
2019 | 3,889 |  |
Prior | 3,299 |  |
Revolving Loans | 1,578 |  |
Total loans | 40,974 | 41,084 |
Commercial Real Estate Multifamily [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 0 |
Commercial Real Estate Multifamily [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 0 |
Commercial Real Estate Multifamily [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 |  |
Commercial Real Estate Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 0 | 2,116 |
2023 | 5,546 |  |
2022 | 38,002 |  |
2021 | 33,006 |  |
2020 | 15,995 |  |
2019 | 11,241 |  |
Prior | 21,706 |  |
Revolving Loans | 1,253 |  |
Total loans | 126,749 | 128,986 |
Commercial Real Estate Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 5,546 |  |
2022 | 38,002 |  |
2021 | 33,006 |  |
2020 | 15,834 |  |
2019 | 11,241 |  |
Prior | 21,706 |  |
Revolving Loans | 1,253 |  |
Total loans | 126,588 | 126,700 |
Commercial Real Estate Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 | 170 |
Commercial Real Estate Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 161 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 161 | 0 |
Commercial Real Estate Other Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 |  |
Commercial Real Estate Loans, Total [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,103 | 2,116 |
Total loans | 267,962 | 264,573 | 235,062
Commercial Real Estate Loans, Total [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans |  | 261,888 |
Commercial Real Estate Loans, Total [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans |  | 408 |
Commercial Real Estate Loans, Total [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans |  | 161 |
Residential Real Estate Consumer Mortgage Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 135 | 172 |
2023 | 4,375 |  |
2022 | 22,234 |  |
2021 | 2,783 |  |
2020 | 2,874 |  |
2019 | 1,531 |  |
Prior | 14,622 |  |
Revolving Loans | 94 |  |
Total loans | 48,513 | 45,370 |
Residential Real Estate Consumer Mortgage Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 4,375 |  |
2022 | 22,234 |  |
2021 | 2,783 |  |
2020 | 2,874 |  |
2019 | 1,531 |  |
Prior | 13,584 |  |
Revolving Loans | 94 |  |
Total loans | 47,475 | 44,172 |
Residential Real Estate Consumer Mortgage Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 381 |  |
Revolving Loans | 0 |  |
Total loans | 381 | 439 |
Residential Real Estate Consumer Mortgage Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 522 |  |
Revolving Loans | 0 |  |
Total loans | 522 | 587 |
Residential Real Estate Consumer Mortgage Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 135 |  |
Revolving Loans | 0 |  |
Total loans | 135 |  |
Residential Real Estate Investment Property Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 0 | 0 |
2023 | 2,400 |  |
2022 | 15,316 |  |
2021 | 10,569 |  |
2020 | 14,475 |  |
2019 | 6,221 |  |
Prior | 3,604 |  |
Revolving Loans | 877 |  |
Total loans | 53,462 | 52,278 |
Residential Real Estate Investment Property Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 2,400 |  |
2022 | 15,316 |  |
2021 | 10,569 |  |
2020 | 14,231 |  |
2019 | 6,221 |  |
Prior | 3,561 |  |
Revolving Loans | 877 |  |
Total loans | 53,175 | 51,987 |
Residential Real Estate Investment Property Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 43 |  |
Revolving Loans | 0 |  |
Total loans | 43 | 43 |
Residential Real Estate Investment Property Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 244 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 244 | 248 |
Residential Real Estate Investment Property Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 0 |  |
Residential Real Estate Loans, Total [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 135 | 172 |
Total loans | 101,975 | 97,648 | 79,102
Residential Real Estate Loans, Total [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans |  | 96,159 |
Residential Real Estate Loans, Total [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans |  | 482 |
Residential Real Estate Loans, Total [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans |  | 835 |
Consumer Installment and Revolving Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 10 | 0 |
2023 | 1,231 |  |
2022 | 5,585 |  |
2021 | 1,307 |  |
2020 | 445 |  |
2019 | 200 |  |
Prior | 234 |  |
Revolving Loans | 0 |  |
Total loans | 9,002 | 9,546 | $ 8,412
Financing Receivable Excluding Accrued Interest Year Two Originated Current Fiscal Year Writeoff | 6 |  |
Financing Receivable Excluding Accrued Interest Year Three Originated Current Fiscal Year Writeoff | 5 |  |
FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff | 11 |  |
Consumer Installment and Revolving Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 1,216 |  |
2022 | 5,565 |  |
2021 | 1,285 |  |
2020 | 440 |  |
2019 | 196 |  |
Prior | 234 |  |
Revolving Loans | 0 |  |
Total loans | 8,936 | 9,498 |
Consumer Installment and Revolving Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 5 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 5 | 1 |
Consumer Installment and Revolving Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 15 |  |
2022 | 20 |  |
2021 | 12 |  |
2020 | 0 |  |
2019 | 4 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | 51 | $ 47 |
Consumer Installment and Revolving Loans [Member] | NonAccrual [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 10 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 0 |  |
Revolving Loans | 0 |  |
Total loans | $ 10 |  |

X
- References No definition available. + Details
Name: | aubn_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedCurrentFiscalYearWriteoff
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | aubn_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedCurrentFiscalYearWriteoff
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=aubn_NonaccrualMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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

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

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