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Financial Instruments with Off-Balance-Sheet Risk - Commitments and Conditional Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Revolving, Open Ended Home Equity Loans [Member]
Commitments and conditional obligations
Contract or Notional Amount	$ 88,188	$ 86,253
1-4 Family Residential Construction Loans [Member]
Commitments and conditional obligations
Contract or Notional Amount	2,351	2,657
Commercial Real Estate, Construction and Land Development Loans [Member]
Commitments and conditional obligations
Contract or Notional Amount	5,786	2,961
Commercial, Industrial and Other Loans [Member]
Commitments and conditional obligations
Contract or Notional Amount	48,657	45,629
Standby Letters of Credit [Member]
Commitments and conditional obligations
Contract or Notional Amount	$ 6,194	$ 6,267

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- Details

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Namespace Prefix:	orrf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant