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CONTINGENCIES (Detail) $ in Millions		3 Months Ended
	Jun. 22, 2015	Jun. 30, 2016 USD ($)	Sep. 30, 2016 claim
Commitments and Contingencies Disclosure [Abstract]
Legal proceedings | claim			0
Number of days to file an amendment or stand on current amended complaint	30 days
Legal reserve established pertaining to the Commission's investigation | $		$ 1

X

- Definition

Loss Contingency, Claims Dismissed, Period To File An Amendment Or Notice To Stand On The Amended Complaint

+ References

No definition available.

+ Details

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X

- Definition

Number of legal proceedings that have material effect.

+ References

No definition available.

+ Details

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Namespace Prefix:	orrf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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