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STOCK-BASED COMPENSATION PLANS - Stock Options Outstanding (Detail)	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of options outstanding (in shares) | shares	466,677
Weighted average exercise price of options outstanding (in dollars per share)	$ 61.04
Number of options currently exercisable (in shares) | shares	283,169
Weighted average exercise price of options currently exercisable (in dollars per share)	$ 50.60
Under $35.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price, high range (in dollars per share)	$ 35.00
Number of options outstanding (in shares) | shares	71,765
Weighted average exercise price of options outstanding (in dollars per share)	$ 27.84
Weighted average remaining contractual life (in years)	2 years
Number of options currently exercisable (in shares) | shares	71,765
Weighted average exercise price of options currently exercisable (in dollars per share)	$ 27.84
35.00 - 50.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price, high range (in dollars per share)	35.00
Exercise price, low range (in dollars per share)	$ 50.00
Number of options outstanding (in shares) | shares	107,034
Weighted average exercise price of options outstanding (in dollars per share)	$ 41.36
Weighted average remaining contractual life (in years)	3 years 7 months
Number of options currently exercisable (in shares) | shares	107,034
Weighted average exercise price of options currently exercisable (in dollars per share)	$ 41.36
50.00 - 65.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price, high range (in dollars per share)	50.00
Exercise price, low range (in dollars per share)	$ 65.00
Number of options outstanding (in shares) | shares	65,199
Weighted average exercise price of options outstanding (in dollars per share)	$ 61.33
Weighted average remaining contractual life (in years)	7 years 1 month
Number of options currently exercisable (in shares) | shares	24,615
Weighted average exercise price of options currently exercisable (in dollars per share)	$ 61.33
65.00 - 80.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price, high range (in dollars per share)	65.00
Exercise price, low range (in dollars per share)	$ 80.00
Number of options outstanding (in shares) | shares	98,981
Weighted average exercise price of options outstanding (in dollars per share)	$ 72.21
Weighted average remaining contractual life (in years)	7 years 7 months
Number of options currently exercisable (in shares) | shares	38,187
Weighted average exercise price of options currently exercisable (in dollars per share)	$ 72.85
Over 80.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise price, low range (in dollars per share)	$ 80.00
Number of options outstanding (in shares) | shares	123,698
Weighted average exercise price of options outstanding (in dollars per share)	$ 88.25
Weighted average remaining contractual life (in years)	7 years 6 months
Number of options currently exercisable (in shares) | shares	41,568
Weighted average exercise price of options currently exercisable (in dollars per share)	$ 86.90

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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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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