Stock-Based Compensation (Schedule Of Stock Option Plans Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Shares
Options outstanding at beginning of year, shares	425	995	1,305
Options granted, shares	0	0	83
Options exercised, shares	(108)	(561)	(277)
Options forfeited and expired, shares	(19)	(9)	(116)
Options outstanding at end of year, shares	298	425	995
Options exercisable at end of year, shares	257	343	814
Options granted during the year, price per share	$ 0.00	$ 0.00	$ 66.14
Options exercised during the year, price per share	$ 79.04
Options outstanding at the end of year, price per share	$ 68.63	$ 71.50
Options exercisable at end of year, price per share	$ 69.24
Minimum [Member]
Shares
Options exercised during the year, price per share	$ 28.37	$ 28.37	$ 28.37
Options forfeited and expired during the year, price per share	$ 46.80	$ 48.50	$ 46.80
Options outstanding at the end of year, price per share	$ 28.37	$ 28.37	$ 28.37
Options exercisable at end of year, price per share	$ 28.37	$ 28.37	$ 28.37
Maximum [Member]
Shares
Options exercised during the year, price per share	$ 93.65	$ 93.65	$ 88.33
Options forfeited and expired during the year, price per share	$ 93.65	$ 88.33	$ 93.65
Options outstanding at the end of year, price per share	$ 93.65	$ 93.65	$ 93.65
Options exercisable at end of year, price per share	$ 93.65	$ 93.65	$ 93.65

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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)

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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