Shareholders' Equity (Summary Of Stock Options And RSUs Granted Separated Into Ranges Of Exercise Price) (Details) (USD $)	12 Months Ended
Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options	6,359,567
Options and RSUs exercisable	4,530,660
RSUs 0.0 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 0.0
Exercise price, upper range limit	$ 0.00
RSUs outstanding	660,555
Outstanding options, Weighted average exercise price	$ 0.00
0.01-2.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 0.01
Exercise price, upper range limit	$ 2.00
Outstanding options	91,666
Outstanding options, Weighted average remaining contractual life (years)	9 years 11 months 23 days
Outstanding options, Weighted average exercise price	$ 1.08
Options and RSUs exercisable	91,666
Exercisable options, Remaining contractual life (in years)	9 years 11 months 23 days
Exercisable options, Weighted average exercise price	$ 1.08
2.01-4.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 2.01
Exercise price, upper range limit	$ 4.00
Outstanding options	865,163
Outstanding options, Weighted average remaining contractual life (years)	8 years 25 days
Outstanding options, Weighted average exercise price	$ 2.97
Options and RSUs exercisable	275,277
Exercisable options, Remaining contractual life (in years)	6 years 7 months 20 days
Exercisable options, Weighted average exercise price	$ 3.38
4.01-6.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 4.01
Exercise price, upper range limit	$ 6.00
Outstanding options	1,813,245
Outstanding options, Weighted average remaining contractual life (years)	3 years 7 months 24 days
Outstanding options, Weighted average exercise price	$ 5.04
Options and RSUs exercisable	1,621,438
Exercisable options, Remaining contractual life (in years)	3 years 1 month 20 days
Exercisable options, Weighted average exercise price	$ 5.07
6.01-8.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 6.01
Exercise price, upper range limit	$ 8.00
Outstanding options	59,500
Outstanding options, Weighted average remaining contractual life (years)	7 years 1 month 10 days
Outstanding options, Weighted average exercise price	$ 6.94
Options and RSUs exercisable	38,183
Exercisable options, Remaining contractual life (in years)	6 years 10 months 10 days
Exercisable options, Weighted average exercise price	$ 7.00
8.01-10.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 8.01
Exercise price, upper range limit	$ 10.00
Outstanding options	1,572,316
Outstanding options, Weighted average remaining contractual life (years)	6 years 11 days
Outstanding options, Weighted average exercise price	$ 9.02
Options and RSUs exercisable	1,265,967
Exercisable options, Remaining contractual life (in years)	5 years 8 months 23 days
Exercisable options, Weighted average exercise price	$ 9.03
10.01-14.29 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 10.01
Exercise price, upper range limit	$ 14.29
Outstanding options	1,297,122
Outstanding options, Weighted average remaining contractual life (years)	5 years 3 months 11 days
Outstanding options, Weighted average exercise price	$ 12.40
Options and RSUs exercisable	1,238,129
Exercisable options, Remaining contractual life (in years)	5 years 2 months 26 days
Exercisable options, Weighted average exercise price	$ 12.39

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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)(2)(i)-(ii)

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

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- Definition

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

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- Definition

Weighted average remaining contractual term of exercisable 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)(2)

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

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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

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ 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)(iii)

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

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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

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are 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

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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

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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

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