|
Equity (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Options granted | ||
| Weighted average fair value of options granted | $ 42.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | |
| Number of options exercised | 91,528us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 116,609us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |
| Increase in equity | $ 2.0us-gaap_StockholdersEquityPeriodIncreaseDecrease | $ 1.0us-gaap_StockholdersEquityPeriodIncreaseDecrease |
| Stock option term | 10 years | |
| Vesting period | 4 years | |
| Unrecognized compensation cost | 31.3us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | |
| Weighted average period for recognition | 1 year 3 months 18 days | |
| Restricted Stock Units [Member] | ||
| Options granted |
52,460us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockUnitsRSUMember |
6,247us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockUnitsRSUMember |
| Unrecognized compensation cost |
$ 52.5us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_StatementClassOfStockAxis = us-gaap_RestrictedStockUnitsRSUMember |
|
| Weighted average period for recognition | 3 years 3 months 18 days | |
| X | ||||||||||
|
- Definition
Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- Definition
The increase (decrease) in stockholders' equity during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|