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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Additional Information (Detail)	Jan. 19, 2016 USD ($)
Equity [Abstract]
Aggregate capital, amount	$ 100,000,000

X

- Definition

Authorized Share Capital

+ References

No definition available.

+ Details

Name:	orrf_AuthorizedShareCapital
Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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