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DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS - Schedule of assets measured and recorded at fair value on a non-recurring basis (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Disclosures about Fair Value Measurements and Financial Instruments |  |
Individually evaluated loans with carrying value | $ 0 | $ 1,600
Specific valuation allowance |  | 3
Individually evaluated loans |  | $ 1,600
Other real estate owned and repossessed assets | 15 |
Impaired loans |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Loan Held-for-Sale, Valuation Technique [Extensible Enumeration] |  | asrv:AppraisalOfCollateralMember
Loan Held-for-Sale, Measurement Input [Extensible Enumeration] |  | us-gaap:MeasurementInputAppraisedValueMember
Other real estate owned and repossessed assets |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other Real Estate Owned, Valuation Technique [Extensible Enumeration] |  | asrv:AppraisalOfCollateralMember
Other Real Estate Owned, Measurement Input [Extensible Enumeration] |  | us-gaap:MeasurementInputAppraisedValueMember, Measurement Input, Liquidation expenses [Member]
Fair Value Measurements, Nonrecurring Basis |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Impaired loans |  | $ 1,583
Other real estate owned and repossessed assets | 15 | 39
Fair Value Measurements, Nonrecurring Basis | Level 1 |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Impaired loans |  | 0
Other real estate owned and repossessed assets | 0 | 0
Fair Value Measurements, Nonrecurring Basis | Level 2 |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Impaired loans |  | 0
Other real estate owned and repossessed assets | 0 | 0
Fair Value Measurements, Nonrecurring Basis | Level 3 |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Impaired loans |  | 1,583
Other real estate owned and repossessed assets | 15 | 39
Fair Value Measurements, Nonrecurring Basis | Level 3 | Impaired loans |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Impaired loans |  | 1,583
Fair Value Measurements, Nonrecurring Basis | Level 3 | Other real estate owned and repossessed assets |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Impaired loans | $ 15 | $ 39
Other real estate owned and repossessed assets, Measurement Input | 0.63 | 0.52
Fair Value Measurements, Nonrecurring Basis | Level 3 | Other real estate owned and repossessed assets | Measurement Input, Liquidation expenses [Member] |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other real estate owned and repossessed assets, Measurement Input | 0.33 |
Fair Value Measurements, Nonrecurring Basis | Level 3 | Minimum | Impaired loans |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Loan, Measurement Input |  | 0
Fair Value Measurements, Nonrecurring Basis | Level 3 | Minimum | Other real estate owned and repossessed assets | Measurement Input, Liquidation expenses [Member] |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other real estate owned and repossessed assets, Measurement Input |  | 0.10
Fair Value Measurements, Nonrecurring Basis | Level 3 | Maximum | Impaired loans |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Loan, Measurement Input |  | 1
Fair Value Measurements, Nonrecurring Basis | Level 3 | Maximum | Other real estate owned and repossessed assets | Measurement Input, Liquidation expenses [Member] |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other real estate owned and repossessed assets, Measurement Input |  | 0.39
Fair Value Measurements, Nonrecurring Basis | Level 3 | Wgtd Ave | Impaired loans |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Loan, Measurement Input |  | 0.002
Fair Value Measurements, Nonrecurring Basis | Level 3 | Wgtd Ave | Other real estate owned and repossessed assets |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other real estate owned and repossessed assets, Measurement Input | 0.63 | 0.52
Fair Value Measurements, Nonrecurring Basis | Level 3 | Wgtd Ave | Other real estate owned and repossessed assets | Measurement Input, Liquidation expenses [Member] |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other real estate owned and repossessed assets, Measurement Input |  | 0.11
Fair Value Measurements, Nonrecurring Basis | Level 3 | Wgtd Ave | Other real estate owned and repossessed assets | Measurement Input, Liquidation expenses [Member] |  |
Disclosures about Fair Value Measurements and Financial Instruments |  |
Other real estate owned and repossessed assets, Measurement Input | 0.33 |

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