Share-Based Compensation - Activity in Company's Plan (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at January 1, 2014, Number of Shares	13,000
Granted, Number of Shares	0
Exercised, Number of Shares	0
Forfeited, Number of Shares	0
Outstanding (exercisable and vested) at March 31, 2014, Number of Shares	13,000
Exercisable at March 31, 2014, Number of Shares	13,000
Outstanding at January 1, 2014, Weighted Average Exercise Price per Share	$ 39.95
Granted, Weighted Average Exercise Price per Share	$ 0.00
Exercised, Weighted Average Exercise Price per Share	$ 0.00
Forfeited, Weighted Average Exercise Price per Share	$ 0.00
Outstanding (exercisable and vested) at March 31, 2014, Weighted Average Exercise Price per Share	$ 39.95
Exercisable at March 31, 2014, Weighted Average Exercise Price per Share	$ 39.95
Outstanding (exercisable and vested), Weighted Average Remaining Contractual Term	3 years 4 months 24 days
Exercisable, Weighted Average Remaining Contractual Term	3 years 4 months 24 days
Outstanding (exercisable and vested), Aggregate Intrinsic Value	$ 372
Exercisable, Aggregate Intrinsic Value	$ 372

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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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.

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Weighted average remaining contractual term for vested portions of options outstanding and currently 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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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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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 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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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