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Summary of Option Activity (Detail) (USD $)	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Beginning balance	460,879	478,379	561,029
Incentive Stock Option Plans, Option exercised	(1,000)	(17,500)	(82,650)
Incentive Stock Option Plans, Ending balance	459,879	460,879	478,379
Weighted Average Price Per Share, Beginning balance	$ 7.81	$ 7.80	$ 7.76
Weighted Average Price Per Share, Option exercised	$ 7.50	$ 7.50	$ 7.50
Weighted Average Price Per Share, Ending balance	$ 7.81	$ 7.81	$ 7.80
Exercisable Weighted Average Price Per Share, Beginning balance	$ 7.77	$ 7.74	$ 7.70
Exercisable Weighted Average Price Per Share, Ending balance	$ 7.81	$ 7.77	$ 7.74

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of share options (or share units) exercised during the current period.

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