Stock Compensation Plans (Schedule Of SSAR Exercise Price Range, Number Of Shares, Weighted Average Exercise Price And Remaining Contractual Lives) (Details) - $ / shares	9 Months Ended
Sep. 30, 2015	Dec. 31, 2014
$21.45 - $32.01 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, lower limit, dollars per share	$ 21.45
Range of Exercise Prices, upper limit, dollars per share	32.01
$33.65 - $43.88 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, lower limit, dollars per share	33.65
Range of Exercise Prices, upper limit, dollars per share	43.88
$47.89 - $63.64 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, lower limit, dollars per share	47.89
Range of Exercise Prices, upper limit, dollars per share	$ 63.64
Stock Appreciation Rights (SARs) [Member]
SSARs Outstanding
SSARs Outstanding, shares	1,397,180	1,220,824
Weighted Average Remaining Contractual Life, years	4 years
SSARs Exercisable
Number of Shares	673,724
Weighted Average Exercise Price, dollars per share
Stock Appreciation Rights (SARs) [Member] \| $21.45 - $32.01 [Member]
SSARs Outstanding
SSARs Outstanding, shares	15,500
Weighted Average Remaining Contractual Life, years	7 months 6 days
Weighted Average Exercise Price, dollars per share	$ 23.32
SSARs Exercisable
Number of Shares	15,500
Weighted Average Exercise Price, dollars per share	$ 23.32
Stock Appreciation Rights (SARs) [Member] \| $33.65 - $43.88 [Member]
SSARs Outstanding
SSARs Outstanding, shares	437,800
Weighted Average Remaining Contractual Life, years	5 years
Weighted Average Exercise Price, dollars per share	$ 41.24
SSARs Exercisable
Number of Shares	115,175
Weighted Average Exercise Price, dollars per share	$ 33.83
Stock Appreciation Rights (SARs) [Member] \| $47.89 - $63.64 [Member]
SSARs Outstanding
SSARs Outstanding, shares	943,880
Weighted Average Remaining Contractual Life, years	4 years 1 month 6 days
Weighted Average Exercise Price, dollars per share	$ 53.52
SSARs Exercisable
Number of Shares	543,049
Weighted Average Exercise Price, dollars per share	$ 52.96

The number of share-based awards that were exercisable as of the reporting date, excluding options.

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercisable [Abstract]

+ References

No definition available.

+ Details

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- Definition

The weighted average exercise price of share-based awards that were exercisable as of the reporting date, excluding options.

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding [Abstract]

+ References

No definition available.

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- Definition

Weighted average exercise price for equity-based awards excluding options.

+ References

No definition available.

+ 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 settled appreciation rights and other required information pertaining to awards in the customized range.

+ References

No definition available.

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock settled appreciation rights and other required information pertaining to awards in the customized range.

+ References

No definition available.

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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.

+ References

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- Definition

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

+ 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)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-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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