Summary of Significant Accounting Policies - Stock-Based Compensation (Details) $ in Millions |
Dec. 31, 2017
USD ($)
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|---|---|
| Summary of Significant Accounting Policies | |
| Amount of deferred tax assets that had not been previously recognized due to the recognition of excess tax benefits as it relates to stock-based compensation expense | $ 0.4 |
| X | ||||||||||
- Definition The amount of deferred tax assets that had not been previously recognized due to the recognition of excess tax benefits as it relates to stock-based compensation expense. No definition available.
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| X | ||||||||||
- References No definition available.
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