XML 29 R19.htm IDEA: XBRL DOCUMENT
v3.22.2

Securities (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2022
Investments debt and equity securities [Abstract] |
Available-for-sale Securities [Table Text Block] | 1 year 1 to 5 5 to 10 After 10 Fair Gross Unrealized Amortized (Dollars in thousands) or less years years years Value Gains Losses Cost June 30, 2022 Agency obligations (a) $ — 48,476 78,435 — 126,911 29 10,528 $ 137,410 Agency MBS (a) — 470 36,849 197,266 234,585 75 23,260 257,770 State and political subdivisions 170 954 15,828 50,772 67,724 182 4,447 71,989 Total available-for-sale $ 170 49,900 131,112 248,038 429,220 286 38,235 $ 467,169 December 31, 2021 Agency obligations (a) $ 5,007 49,604 69,802 — 124,413 1,080 2,079 $ 125,412 Agency MBS (a) — 680 35,855 186,836 223,371 1,527 2,680 224,524 State and political subdivisions 170 647 15,743 57,547 74,107 3,611 270 70,766 Total available-for-sale $ 5,177 50,931 121,400 244,383 421,891 6,218 5,029 $ 420,702 (a) Includes securities issued by U.S. government agencies or government-sponsored entities.
Available-for-sale Securities, Continuous Unrealized Loss Position [Table Text Block] | Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses June 30, 2022: Agency obligations $ 82,207 4,618 40,557 5,910 $ 122,764 10,528 Agency MBS 174,783 15,711 53,160 7,549 227,943 23,260 State and political subdivisions 47,577 3,773 3,332 674 50,909 4,447 Total $ 304,567 24,102 97,049 14,133 $ 401,616 38,235 December 31, 2021: Agency obligations $ 49,799 1,025 26,412 1,054 $ 76,211 2,079 Agency MBS 130,110 1,555 38,611 1,125 168,721 2,680 State and political subdivisions 7,960 109 3,114 161 11,074 270 Total $ 187,869 2,689 68,137 2,340 $ 256,006 5,029

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

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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