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Stock-Based Compensation Plan (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | |
|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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| Options granted | 4,633 | |
| Weighted average fair value of options granted | $ 42.85 | |
| Number of options exercised | 116,609 | 292,808 |
| Increase in equity | $ 1,000 | $ 3,600 |
| Stock option term | 10 years | |
| Vesting period | 4 years | |
| Unrecognized compensation cost | 37,100 | |
| Weighted average period for recognition | 1 year 9 months 18 days | |
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Restricted Stock Units [Member]
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| Options granted | 6,247 | |
| Unrecognized compensation cost | $ 18,200 | |
| Weighted average period for recognition | 3 years 4 months 24 days | |
| X | ||||||||||
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- Definition
Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The increase (decrease) in stockholders' equity during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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