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DERIVATIVES FINANCIAL INSTRUMENTS - Summary of Interest Rate Swap Components (Details) - Derivatives | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Weighted average pay rate |  | 0.77% | 0.77%
Weighted average receive rate |  | 0.10% | 0.09%
Weighted average maturity in years | 4 years 2 months 12 days | 3 years 8 months 12 days |

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- Definition Derivative Weighted Average Pay Rate + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition Derivative Weighted Average Rate Received + References No definition available. + Details
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Namespace Prefix: | orrf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Period Type: |