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Shareholders' Equity and Regulatory Capital - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 08, 2013
Equity [Abstract]
Aggregate capital, amount	$ 80,000

X

- Definition

Authorized Share Capital

+ References

No definition available.

+ Details

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

X

- Details

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