STOCK BASED COMPENSATION - Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
Sep. 30, 2014
Number of Options
Outstanding at beginning of year	5,540,482
Granted	975,038
Exercised	(646,434)
Forfeited	(101,361)
Canceled or expired	(1,657)
Outstanding at September 30, 2014	5,766,068
Exercisable at September 30, 2014	3,030,962
Vested and expected to vest at September 30, 2014	5,527,430
Weighted Average Exercise Price per Share
Outstanding at beginning of year	$ 70.29
Granted	$ 115.31
Exercised	$ 53.91
Forfeited	$ 93.91
Canceled or expired	$ 80.96
Outstanding at September 30, 2014	$ 79.32
Exercisable at September 30, 2014	$ 63.97
Vested and expected to vest at September 30, 2014	$ 78.34
Weighted Average Remaining Contractual Life
Outstanding at September 30, 2014	6 years 3 months
Exercisable at September 30, 2014	5 years 2 months 5 days
Total Aggregate Intrinsic Value
Outstanding at September 30, 2014	$ 214,733
Exercisable at September 30, 2014	$ 159,403

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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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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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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Net 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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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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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