XML 27 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Securities Trust Preferred Continuous Unrealized Loss (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Trust Preferred Securities, Continuous Unrealized Loss Position, Fair Value [Member] |  |
Pooled: |  |
ALESCO Preferred Funding XVII LTD |  | $ 100
Individual Issuer [Abstract] |  |
Carolina Financial Capital Trust I | 274 | 193
Main Street Bank Statutory Trust I |  | 389
MNB Capital Trust I |  | 55
PrimeSouth Capital Trust I |  | 75
TCB Trust | 356 | 368
United Community Capital Trust |  | 806
Individual Issuer |  | 1,886
Trust Preferred Securities | 630 | 1,986
Trust Preferred Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses [Member] |  |
Pooled: |  |
ALESCO Preferred Funding XVII LTD |  | 0
Individual Issuer [Abstract] |  |
Carolina Financial Capital Trust I | 0 | 0
Main Street Bank Statutory Trust I |  | 0
MNB Capital Trust I |  | 0
PrimeSouth Capital Trust I |  | 0
TCB Trust | 0 | 0
United Community Capital Trust |  | 0
Individual Issuer |  | 0
Trust Preferred Securities | 0 | 0
Trust Preferred Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses [Member] |  |
Pooled: |  |
ALESCO Preferred Funding XVII LTD |  | 130
Individual Issuer [Abstract] |  |
Carolina Financial Capital Trust I | 0 | 0
Main Street Bank Statutory Trust I |  | 111
MNB Capital Trust I |  | 0
PrimeSouth Capital Trust I |  | 0
TCB Trust | 144 | 132
United Community Capital Trust |  | 0
Individual Issuer |  | 243
Trust Preferred Securities | 144 | 373
Trust Preferred Securities, Continuous Unrealized Loss Position, Aggregate Losses [Member] |  |
Pooled: |  |
ALESCO Preferred Funding XVII LTD |  | 130
Individual Issuer [Abstract] |  |
Carolina Financial Capital Trust I | 0 | 0
Main Street Bank Statutory Trust I |  | 111
PrimeSouth Capital Trust I |  | 0
TCB Trust | 144 | 132
United Community Capital Trust |  | 0
Individual Issuer |  | 243
Trust Preferred Securities | 144 | 373
Trust Preferred Securities, Continuous Unrealized Loss Position, Life to Date Impairment [Member] |  |
Pooled: |  |
ALESCO Preferred Funding XVII LTD |  | 1,770
Individual Issuer [Abstract] |  |
Carolina Financial Capital Trust I | 257 | 257
Main Street Bank Statutory Trust I |  | 0
MNB Capital Trust I |  | 445
PrimeSouth Capital Trust I |  | 425
TCB Trust | 0 | 0
United Community Capital Trust |  | 379
Individual Issuer |  | 1,506
Trust Preferred Securities | $ 257 | $ 3,276

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_AlescoPreferredFundingXviiLtd
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_CarolinaFinancialCapitalTrustI
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_IndividualIssuer
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | aubn_IndividualIssuerAbstract
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_MainStreetBankStatutoryTrustI
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_MnbCapitalTrustI
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | aubn_PooledTrustPreferredSecuritiesAbstract
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_PrimesouthCapitalTrustI
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_TcbTrust
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_TrustPreferredSecurities
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_UnitedCommunityCapitalTrust
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant