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DEPOSITS - Additional Information (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Cash and Cash Equivalents [Line Items] |  |
Broker time deposits | $ 80,905 | $ 17,108
Officers and directors deposits | 2,575 | $ 5,036
Bank Time Deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Time deposits that meet or exceed the FDIC limit of $250,000 | $ 19,668 |

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

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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
Name: | us-gaap_CashAndCashEquivalentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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
Name: | us-gaap_CashUninsuredAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_BankTimeDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |