XML 31 R32.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Mortgage Servicing Rights, Net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Mortgage Servicing [Abstract] |
Schedule Of Servicing Assets At Fair Value [Table Text Block] |
|  |  |  |  | Year ended December 31
(Dollars in thousands) |  |  |  |  | 2019 |  |  | 2018
Beginning balance |  |  |  | $ | 1,441 |  |  | 1,644
Additions, net |  |  |  |  | 241 | . |  | 208
Amortization expense |  |  |  |  | (383) |  |  | (411)
Ending balance |  |  |  | $ | 1,299 |  |  | 1,441
Valuation allowance included in MSRs, net: |  |  |  |  |  |  |  |
Beginning of period |  |  |  | $ | — |  |  | —
End of period |  |  |  |  | — |  |  | —
Fair value of amortized MSRs: |  |  |  |  |  |  |  |
Beginning of period |  |  |  | $ | 2,697 |  |  | 2,528
End of period |  |  |  |  | 2,111 |  |  | 2,697
Data And Assumptions Used In Fair Value Calculation Of MSRs [Table Text Block] |
|  |  |  | December 31
(Dollars in thousands) |  |  | 2019 |  |  | 2018
Unpaid principal balance |  | $ | 274,227 |  |  | 289,981
Weighted average prepayment speed (CPR) |  |  | 11.6 | % |  | 8.3
Discount rate (annual percentage) |  |  | 10.0 | % |  | 10.0
Weighted average coupon interest rate |  |  | 3.9 | % |  | 3.9
Weighted average remaining maturity (months) |  |  | 255 |  |  | 250
Weighted average servicing fee (basis points) |  |  | 25.0 |  |  | 25.0
Estimated Amortization Expense Of MSRs For Five Years [Table Text Block] |
(Dollars in thousands) | December 31, 2019
2020 |  |  | $ | 220
2021 |  |  |  | 182
2022 |  |  |  | 151
2023 |  |  |  | 126
2024 |  |  |  | 105

X
- References No definition available. + Details
Name: | aubn_DataAndAssumptionsUsedInFairValueCalculationOfMSRsTableTextBlock
Namespace Prefix: | aubn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the activity in the balance of servicing assets (including a description of where changes in fair value are reported in the statement of income for each period for which results of operations are presented), including but not limited to, the following: beginning and ending balances, additions (for instance, through purchases of servicing assets), disposals, changes in fair value during the period resulting from changes in inputs or assumptions used in the valuation model, other changes in fair value along with a description of those changes, and other changes that affect the balance along with a description of those changes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746 + Details
Name: | us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration