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Share-Based Compensation - Activity in Company's Plan (Detail) - 1999 Stock Option Plan [Member] $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2015, Number of Shares	12,000
Granted, Number of Shares	0
Exercised, Number of Shares	0
Forfeited, Number of Shares	0
Outstanding (exercisable and vested) at September 30, 2015 , Number of Shares	12,000
Outstanding at January 1, 2015, Weighted Average Exercise Price per Share | $ / shares	$ 41.44
Granted, Weighted Average Exercise Price per Share | $ / shares	0.00
Exercised, Weighted Average Exercise Price per Share | $ / shares	0.00
Forfeited, Weighted Average Exercise Price per Share | $ / shares	0.00
Outstanding (exercisable and vested) at September 30, 2015, Weighted Average Exercise Price per Share | $ / shares	$ 41.44
Outstanding (exercisable and vested), Weighted Average Remaining Contractual Term	2 years 1 month 6 days
Outstanding (exercisable and vested) Aggregate Intrinsic Value | $	$ 11

X

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(1)(iv)(3)



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Gross number of share options (or share units) granted during the period.

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

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As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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