Summary of Significant Accounting Policies - Share-Based Compensation (Details) |
12 Months Ended |
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Dec. 31, 2018 | |
Stock Options | Minimum | |
Share-Based Compensation | |
Vesting period | 3 years |
Stock Options | Maximum | |
Share-Based Compensation | |
Vesting period | 5 years |
Expiration period | 10 years |
Service-based conditions | Restricted Stock Awards | Minimum | |
Share-Based Compensation | |
Vesting period | 3 years |
Service-based conditions | Restricted Stock Awards | Maximum | |
Share-Based Compensation | |
Vesting period | 5 years |
Performance-based conditions | Restricted Stock Awards | |
Share-Based Compensation | |
Vesting period | 3 years |
Performance-based conditions | Restricted Stock Awards | Minimum | |
Share-Based Compensation | |
Expense measurement, payout range (as percent) | 0.00% |
Performance-based conditions | Restricted Stock Awards | Maximum | |
Share-Based Compensation | |
Expense measurement, payout range (as percent) | 200.00% |
Market-based conditions | Restricted Stock Awards | |
Share-Based Compensation | |
Vesting period | 3 years |
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- Definition The payout range expressed as a percentage of the grant date fair value related to performance-based awards. No definition available.
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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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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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://fasb.org/us-gaap/role/ref/legacyRef
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