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RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	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	$ 12,481orrf_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