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DEPOSITS - Additional Information (Detail) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Cash and Cash Equivalents [Line Items] |  |
Broker time deposits | $ 17,108,000 orrf_TimeDepositBrokered | $ 53,196,000 orrf_TimeDepositBrokered
Officers and directors deposits | 5,036,000 orrf_EmployeesDeposits | 550,000 orrf_EmployeesDeposits
Bank Time Deposits [Member] |  |
Cash and Cash Equivalents [Line Items] |  |
Time deposits that meet or exceed the FDIC limit of $250,000 | $ 36,463,000 us-gaap_CashUninsuredAmount / us-gaap_CashAndCashEquivalentsAxis = us-gaap_BankTimeDepositsMember |

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

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

X
- 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

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