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Fair Value Disclosures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Risks and Uncertainties [Abstract]
Allowance for loan losses	$ 5,923	$ 3,238
Specific charges to value the real estate owned	420	411
Short-term borrowings maturity period	90 days
Fair Value, Measurements, Recurring [Member]
Risks and Uncertainties [Abstract]
Fair value liabilities	$ 0	$ 0

X

- Definition

Impaired financing receivables allocated allowance.

+ References

No definition available.

+ Details

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- Definition

Short term borrowing maturity period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Specific charges to value the real estate owned at the lower of cost or fair value on properties.

+ References

No definition available.

+ Details

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Namespace Prefix:	orrf_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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