STOCK-BASED COMPENSATION - Narrative (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, net of forfeitures	78,336
Requisite service periods of awards, in years	3 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercisable, vesting period, in years	4 years
Total unrecognized compensation costs	2.7
Weighted-average period for cost recognition, in years	3 years
Restricted stock awards/stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercisable, vesting period, in years	3 years
Total unrecognized compensation costs	20.3
Weighted-average period for cost recognition, in years	2 years
Awards granted during period	117,763
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period	64,770
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period, in years	8 years
Directors and certain executive officers \| Minimum \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period, in years	8 years
Directors and certain executive officers \| Maximum \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period, in years	10 years

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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

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