| **Stock-Based Compensation (Schedule Of Assumptions Used In Black-Scholes Model) (Details)**                                | 3 Months Ended   | 9 Months Ended   |
|-----------------------------------------------------------------------------------------------------------------------------|------------------|------------------|
||
| Employee Stock Option [Member]                                                                                              |             |             |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                          |             |             |   |   |
| Risk-free interest rate                                                                                                     | 1.60%            |             | 1.60% |   |
| Risk-free interest rate, minimum                                                                                            |             | 0.40%            |   | 0.40% |
| Risk-free interest rate, maximum                                                                                            |             | 1.00%            |   | 1.00% |
| Expected volatility, minimum                                                                                                | 37.00%           | 40.00%           | 37.00% | 40.00% |
| Expected volatility, maximum                                                                                                | 42.00%           | 45.00%           | 42.00% | 46.00% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate | 37.00%           | 41.00%           | 37.00% | 43.00% |
| Expected dividends                                                                                                          | 0.00%            | 0.00%            | 0.00% | 0.00% |
| Employee Stock [Member]                                                                                                     |             |             |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                          |             |             |   |   |
| Risk-free interest rate                                                                                                     |             |             | 0.10% |   |
| Risk-free interest rate, minimum                                                                                            |             |             |   | 0.10% |
| Risk-free interest rate, maximum                                                                                            |             |             |   | 0.20% |
| Expected volatility, minimum                                                                                                |             |             | 36.00% | 41.00% |
| Expected volatility, maximum                                                                                                |             |             | 37.00% | 42.00% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate |             |             | 37.00% | 41.00% |
| Expected dividends                                                                                                          |             |             | 0.00% | 0.00% |
| Minimum | Employee Stock Option [Member]                                                                                    |             |             |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                          |             |             |   |   |
| Expected Term                                                                                                               | 4 years 6 months | 4 years 4 months | 4 years 6 months | 4 years 5 months |
| Minimum | Employee Stock [Member]                                                                                           |             |             |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                          |             |             |   |   |
| Expected Term                                                                                                               |             |             | 6 months | 6 months |
| Maximum | Employee Stock [Member]                                                                                           |             |             |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                          |             |             |   |   |
| Expected Term                                                                                                               |             |             | 12 months | 12 months |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Expected term of share-based compensation awards, 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 S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares.
+ 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 (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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| X                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average expected volatility rate of share-based compensation awards.
+ 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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| X                                                                                                                                                                                                      |
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