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RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Equity [Abstract] |
Percentage of bank's total capital limit for covered transactions | 10.00%orrf_PercentageOfBanksCapitalLimitForCoveredTransactions
Percentage limit of covered transactions with affiliates | 20.00%orrf_PercentageOfBanksCapitalLimitForAggregateCoveredTransactions
Maximum amount the Bank has available to loan the Company | $ 12,481 orrf_MaximumAmountAvailableForLoanByBank

X
- Definition Maximum amount available for loan by bank. + References No definition available. + Details
Name: | orrf_MaximumAmountAvailableForLoanByBank
Namespace Prefix: | orrf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of banks capital limit for aggregate covered transactions. + References No definition available. + Details
Name: | orrf_PercentageOfBanksCapitalLimitForAggregateCoveredTransactions
Namespace Prefix: | orrf_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of bank's total capital limit for covered transactions. + References No definition available. + Details
Name: | orrf_PercentageOfBanksCapitalLimitForCoveredTransactions
Namespace Prefix: | orrf_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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