Additional paid-in capital representing excess tax benefits available to absorb potential future tax deficiencies

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- Definition

Nonvested Stock Granted to Directors, Number Of Directors

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

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No definition available.

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- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

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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- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ 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 (j)

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

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.

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- Definition

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.

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- Definition

Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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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)

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(ii)

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

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

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

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No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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No definition available.

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SHARE-BASED COMPENSATION (Narrative) (Detail) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) shares	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Directors $ / shares shares	Sep. 30, 2014 USD ($) $ / shares	Dec. 31, 2014 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock options \| $ / shares			$ 14.40	$ 16.46
Cash received from stock options exercised			$ 9.9	$ 14.3
1993 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance \| shares	7,400,000		7,400,000
Shares reserved for issuance for all outstanding share-based compensation grants \| shares	3,500,000		3,500,000
Capitalized amount of compensation cost recognized			$ 0.6		$ 0.5
Additional paid-in capital representing excess tax benefits available to absorb potential future tax deficiencies	$ 93.4		$ 93.4		89.6
Stock Options And Stock-Settled SARS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grant component, percentage of market price			100.00%
Share-based compensation arrangement by share-based payment award, award vesting rights			0.33333
Share-based compensation arrangement by share-based payment award, award requisite service period			1 year
Contractual life (years)			10 years
Number of units, Granted \| shares			565,408
Weighted-average grant-date fair value of stock options \| $ / shares			$ 14.40	$ 16.46
Compensation cost (income) recognized	2.3	$ 2.4	$ 6.8	$ 6.7
Total intrinsic value of stock options and stock-settled SARS exercised			13.7	32.4
Unrecognized compensation cost	$ 7.0		$ 7.0
Weighted-average period to recognize total unrecognized compensation cost (years)			1 year 3 months 18 days
Vesting period for majority of awards (years)			3 years
Tax benefits realized			$ 5.9	10.9
Cash received from stock options exercised			9.9	14.3
Cash-Settled SARS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (income) recognized			(0.1)	(0.1)
Cash used to settle exercises of cash-settled SARS			$ 0.1	0.7
Liability related to cash-settled SARS					$ 0.2
Non-option awards outstanding \| shares	0		0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-option awards outstanding \| shares	0		0
Non-vested stock and non-vested stock units granted \| shares			0		0
Nonvested Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock and non-vested stock units granted \| shares			66,308
Nonvested Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock and non-vested stock units granted \| shares			13,968
Nonvested stock granted to directors, number of directors \| Directors			9
Nonvested Stock And Nonvested Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost (income) recognized	$ 1.0	$ 1.1	$ 2.9	$ 2.9
Unrecognized compensation cost	$ 3.8		$ 3.8
Weighted-average period to recognize total unrecognized compensation cost (years)			1 year 9 months 18 days
Vesting period for majority of awards (years)			3 years
Non-vested stock and non-vested stock units granted \| shares			80,276
Weighted-average grant-date fair value of nonvested stock and nonvested stock units \| $ / shares			$ 45.20