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SHARE-BASED COMPENSATION PLANS - Information Pertaining to Outstanding and Exercisable Options (Detail) - Jun. 30, 2015 - Orrstown 2011 Incentive Stock Plan - Employee Stock Option - $ / shares	Total
Range of Exercise Prices
Range of Exercise Prices, Minimum	$ 21.14
Range of Exercise Prices, Maximum	$ 37.58
Number Outstanding	102,180
Weighted Average Remaining Contractual Life (Years)	3 years 2 months 27 days
Weighted Average Exercise Price	$ 28.72
$21.14 - $24.99
Range of Exercise Prices
Range of Exercise Prices, Minimum	21.14
Range of Exercise Prices, Maximum	$ 24.99
Number Outstanding	37,024
Weighted Average Remaining Contractual Life (Years)	4 years 10 months 24 days
Weighted Average Exercise Price	$ 21.46
$25.00 - $29.99
Range of Exercise Prices
Range of Exercise Prices, Minimum	25.00
Range of Exercise Prices, Maximum	$ 29.99
Number Outstanding	2,792
Weighted Average Remaining Contractual Life (Years)	4 years 9 months 4 days
Weighted Average Exercise Price	$ 25.76
$30.00 - $34.99
Range of Exercise Prices
Range of Exercise Prices, Minimum	30.00
Range of Exercise Prices, Maximum	$ 34.99
Number Outstanding	39,620
Weighted Average Remaining Contractual Life (Years)	2 years 3 months 15 days
Weighted Average Exercise Price	$ 31.28
$35.00 - $39.99
Range of Exercise Prices
Range of Exercise Prices, Minimum	35.00
Range of Exercise Prices, Maximum	$ 39.99
Number Outstanding	22,744
Weighted Average Remaining Contractual Life (Years)	2 years 7 days
Weighted Average Exercise Price	$ 36.45

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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