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DEPOSITS - Narrative (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Deposits [Abstract] |  |
Brokered time deposits | $ 0.0 | $ 0.0

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

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration