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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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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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For presentations that combine terminations, 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 or that expired.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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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 remaining contractual term for fully vested and expected to vest options outstanding, 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 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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CAPITAL STOCK AND STOCK AWARD PLANS Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Options Outstanding - Number of Shares [Roll Forward]
Outstanding, Beginning Balance	3,497,544
Grants	1,215,018
Exercised	(787)
Terminated	(7,155)
Outstanding, Ending Balance	4,704,620	3,497,544
Vested at December 31, 2014	926,218
Exercisable at December 31, 2014	926,218
Options Outstanding - Weighted Average Exercise Price [Roll Forward]
Outstanding, Beginning Balance	$ 62.21
Grants	$ 74.55
Exercised	$ 68.81
Terminated	$ 58.25
Outstanding, Ending Balance	$ 65.40	$ 62.21
Vested at December 31, 2014	$ 63.28
Exercisable at December 31, 2014	$ 63.28
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Roll Forward]
Outstanding, Beginning Balance
Outstanding, Ending Balance	44,644
Vested at December 31, 2014	10,751
Exercisable at December 31, 2014	$ 10,751
Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Term [Roll Forward]
Outstanding, Beginning Balance	8 years 6 months 22 days
Outstanding, Ending Balance	8 years 6 months 22 days
Vested at December 31, 2014	7 years 11 months 1 day
Exercisable at December 31, 2014	7 years 11 months 1 day
Antidilutive securities excluded from computation of earnings per share, amount		218,932	127,323