Stock Option Transactions (Detail) (USD $)	12 Months Ended
Dec. 31, 2013
Shares
Outstanding at December 31, 2012	50,000
Granted
Exercised
Outstanding at December 31, 2013	50,000
Exercisable at December 31, 2013	15,000
Weighted Average, Exercise Price
Outstanding at December 31, 2012	$ 204.76
Granted
Exercised
Outstanding at December 31, 2013	$ 204.76
Exercisable at December 31, 2013	$ 196.99
Weighted Average Remaining Contractual Term
Outstanding at December 31, 2013	4 years 10 months 24 days
Exercisable at December 31, 2013	4 years 8 months 12 days

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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.

+ References

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-Publisher FASB

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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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Net 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.

+ References

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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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No definition available.

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

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