| Summary of Significant Accounting Policies - Use of Estimates (Details) | 12 Months Ended | 
|---|---|
| Dec. 31, 2019  $ / participant | |
| Accounting Policies [Abstract] | |
| Maximum exposure, per participant | 150,000 | 
| X | ||||||||||
| 
- Definition Loss Contingency, Self Insurance, Maximum Exposure, Per Participant No definition available. 
 | 
| X | ||||||||||
| 
- References No definition available. 
 |