SHARE BASED COMPENSATION PLANS - Information Pertaining to Outstanding and Exercisable Options (Detail) (2011 Incentive Stock Plan [Member], Employee Stock Option [Member], USD $)	12 Months Ended
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	$ 21.14
Range of Exercise Prices, Maximum	$ 40.14
Number Outstanding	148,193
Weighted Average Remaining Contractual Life (Years)	2 years 11 months 27 days
Weighted Average Exercise Price	$ 31.18
$21.14 - $24.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	$ 21.14
Range of Exercise Prices, Maximum	$ 24.99
Number Outstanding	41,853
Weighted Average Remaining Contractual Life (Years)	5 years 4 months 2 days
Weighted Average Exercise Price	$ 21.42
$25.00 - $29.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	$ 25.00
Range of Exercise Prices, Maximum	$ 29.99
Number Outstanding	2,792
Weighted Average Remaining Contractual Life (Years)	5 years 3 months
Weighted Average Exercise Price	$ 25.76
$30.00 - $34.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	$ 30.00
Range of Exercise Prices, Maximum	$ 34.99
Number Outstanding	44,950
Weighted Average Remaining Contractual Life (Years)	2 years 9 months 4 days
Weighted Average Exercise Price	$ 31.26
$35.00 - $39.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	$ 35.00
Range of Exercise Prices, Maximum	$ 39.99
Number Outstanding	29,147
Weighted Average Remaining Contractual Life (Years)	2 years 3 months 18 days
Weighted Average Exercise Price	$ 36.54
$40.00 - $40.14
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	$ 40.00
Range of Exercise Prices, Maximum	$ 40.14
Number Outstanding	29,451
Weighted Average Remaining Contractual Life (Years)	5 months 19 days
Weighted Average Exercise Price	$ 40.14

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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

+ Details

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

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

+ Details

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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

+ Details

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

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

+ Details

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

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

+ Details

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