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LOANS TO RELATED PARTIES - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
New loans including interest granted	$ 1,849orrf_RelatedPartyTransactionAmountOfLoansToRelatedParty	$ 549orrf_RelatedPartyTransactionAmountOfLoansToRelatedParty
New loans granted	1,815orrf_RelatedPartyTransactionAmountOfNewLoansGrantedToRelatedParty
Total repayment of loan	$ 515orrf_RelatedPartyTransactionProceedsFromRepaymentsOfLoansToRelatedParty

X

- Definition

Related party transaction amount of loans to related party.

+ References

No definition available.

+ Details

Name:	orrf_RelatedPartyTransactionAmountOfLoansToRelatedParty
Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Related party transaction amount of new loans granted to related party.

+ References

No definition available.

+ Details

Name:	orrf_RelatedPartyTransactionAmountOfNewLoansGrantedToRelatedParty
Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Related party transaction proceeds from repayments of loans to related party.

+ References

No definition available.

+ Details

Name:	orrf_RelatedPartyTransactionProceedsFromRepaymentsOfLoansToRelatedParty
Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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