XML 58 R47.htm IDEA: XBRL DOCUMENT
v3.25.1

Note 7 - Loans Receivable and Credit Disclosures - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Balance | $ 17,058 |  | $ 16,776 |  | $ 16,776
Credit loss expense (benefit) | 994 | [1] | 172 | [2] |
Recoveries of loans charged-off | 2 |  | 4 |  |
Loans charged-off | (50) |  | 0 |  | (483)
Balance | 18,004 |  | 16,952 |  | 17,058
Construction Real Estate [Member] |  |  |  |  |
Balance | 482 |  | 408 |  | 408
Credit loss expense (benefit) | 65 | [1] | 45 | [2] |
Recoveries of loans charged-off | 0 |  | 0 |  |
Loans charged-off | (44) |  | 0 |  | 0
Balance | 503 |  | 453 |  | 482
Family Residential Real Estate 1-4 [Member] |  |  |  |  |
Balance | 3,890 |  | 3,333 |  | 3,333
Credit loss expense (benefit) | (40) | [1] | (25) | [2] |
Recoveries of loans charged-off | 0 |  | 1 |  |
Loans charged-off | 0 |  | 0 |  | 0
Balance | 3,850 |  | 3,309 |  | 3,890
Multifamily [Member] |  |  |  |  |
Balance | 2,188 |  | 2,542 |  | 2,542
Credit loss expense (benefit) | (36) | [1] | (5) | [2] |
Recoveries of loans charged-off | 0 |  | 0 |  |
Loans charged-off | 0 |  | 0 |  | 0
Balance | 2,152 |  | 2,537 |  | 2,188
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Balance | 4,932 |  | 5,236 |  | 5,236
Credit loss expense (benefit) | 8 | [1] | 258 | [2] |
Recoveries of loans charged-off | 0 |  | 0 |  |
Loans charged-off | 0 |  | 0 |  | 0
Balance | 4,940 |  | 5,494 |  | 4,932
Agriculture Real Estate [Member] |  |  |  |  |
Balance | 1,584 |  | 1,238 |  | 1,238
Credit loss expense (benefit) | 5 | [1] | (17) | [2] |
Recoveries of loans charged-off | 0 |  | 0 |  |
Loans charged-off | 0 |  | 0 |  | 0
Balance | 1,589 |  | 1,221 |  | 1,584
Commercial Portfolio Segment [Member] |  |  |  |  |
Balance | 1,759 |  | 1,955 |  | 1,955
Credit loss expense (benefit) | 1,131 | [1] | (43) | [2] |
Recoveries of loans charged-off | 1 |  | 1 |  |
Loans charged-off | (5) |  | 0 |  | (474)
Balance | 2,886 |  | 1,913 |  | 1,759
Agriculture [Member] |  |  |  |  |
Balance | 1,805 |  | 1,607 |  | 1,607
Credit loss expense (benefit) | (131) | [1] | (19) | [2] |
Recoveries of loans charged-off | 0 |  | 0 |  |
Loans charged-off | 0 |  | 0 |  | 0
Balance | 1,674 |  | 1,588 |  | 1,805
Consumer and Other [Member] |  |  |  |  |
Balance | 418 |  | 457 |  | 457
Credit loss expense (benefit) | (8) | [1] | (22) | [2] |
Recoveries of loans charged-off | 1 |  | 2 |  |
Loans charged-off | (1) |  | 0 |  | (9)
Balance | $ 410 |  | $ 437 |  | $ 418
[1] | The difference in the credit loss expense reported herein as compared to the Consolidated Statements of Income is associated with the credit loss expense of $2 thousand related to off-balance sheet credit exposures.
[2] | The difference in the credit loss expense reported herein as compared to the Consolidated Statements of Income is associated with the credit loss benefit of $69 thousand related to off-balance sheet credit exposures.

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (3) -Publisher SEC Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-22 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=atlo_ConstructionRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=atlo_FamilyResidentialRealEstate14Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=srt_MultifamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=atlo_AgricultureRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=atlo_AgricultureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=atlo_ConsumerAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |