XML 29 R18.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
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
September 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | 9,453 | 19,445 | 21,591 | — | 50,489 |  | — | 1,899 |  | $ | 52,388
Agency RMBS (a) |  | — | — | 8,893 | 113,147 | 122,040 |  | 46 | 5,230 |  |  | 127,224
State and political subdivisions |  | — | 3,391 | 8,000 | 59,416 | 70,807 |  | 461 | 1,166 |  |  | 71,512
| Total available-for-sale | $ | 9,453 | 22,836 | 38,484 | 172,563 | 243,336 |  | 507 | 8,295 |  | $ | 251,124
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Agency obligations (a) | $ | — | 29,253 | 23,809 | — | 53,062 |  | 79 | 904 |  | $ | 53,887
Agency RMBS (a) |  | — | — | 11,201 | 121,871 | 133,072 |  | 330 | 1,639 |  |  | 134,381
State and political subdivisions |  | — | 2,564 | 9,999 | 59,000 | 71,563 |  | 1,616 | 237 |  |  | 70,184
| Total available-for-sale | $ | — | 31,817 | 45,009 | 180,871 | 257,697 |  | 2,025 | 2,780 |  | $ | 258,452
(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
September 30, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | 25,953 |  |  | 418 |  |  | 24,536 |  |  | 1,481 |  | $ | 50,489 |  |  | 1,899
Agency RMBS |  | 51,338 |  |  | 1,622 |  |  | 65,789 |  |  | 3,608 |  |  | 117,127 |  |  | 5,230
State and political subdivisions |  | 27,714 |  |  | 579 |  |  | 10,558 |  |  | 587 |  |  | 38,272 |  |  | 1,166
|  | Total | $ | 105,005 |  |  | 2,619 |  |  | 100,883 |  |  | 5,676 |  | $ | 205,888 |  |  | 8,295
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency obligations | $ | 14,381 |  |  | 99 |  |  | 20,353 |  |  | 805 |  | $ | 34,734 |  |  | 904
Agency RMBS |  | 53,440 |  |  | 363 |  |  | 50,729 |  |  | 1,276 |  |  | 104,169 |  |  | 1,639
State and political subdivisions |  | 2,009 |  |  | 22 |  |  | 10,155 |  |  | 215 |  |  | 12,164 |  |  | 237
|  | Total | $ | 69,830 |  |  | 484 |  |  | 81,237 |  |  | 2,296 |  | $ | 151,067 |  |  | 2,780
Schedule of Realized Gain (Loss) [Table Text Block] |
Realized Gains and Losses
The following table presents the gross realized gains and losses on sales of securities. |  |
|  |  |  |  | Quarter ended September 30, |  |  | Nine Months ended September 30,
(Dollars in thousands) |  |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017
Gross realized gains |  | $ | — |  |  | 49 |  | $ | — |  |  | 51
| Realized gains, net |  | $ | — |  |  | 49 |  | $ | — |  |  | 51

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

X
- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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

X
- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
Name: | us-gaap_ScheduleOfRealizedGainLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration