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DEPOSITS - Narrative (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Banking and Thrift [Abstract] |  |
Brokered time deposits | $ 85,994 | $ 80,905
Cash and Cash Equivalents [Line Items] |  |
Deposits of officers and directors | 2,826 | $ 2,575
Bank Time Deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Time deposits that meet or exceed the FDIC limit | $ 18,868 |

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- Definition Employees deposits. + References No definition available. + Details
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Namespace Prefix: | orrf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Time deposit brokered. + References No definition available. + Details
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Namespace Prefix: | orrf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |