Proxy Contest and Related Costs (Details) $ in Thousands  | 
12 Months Ended | ||
|---|---|---|---|
| 
 Dec. 31, 2020  
USD ($) 
 | 
 Dec. 31, 2019  
USD ($) 
 | 
 Jun. 30, 2020  
director  
board_member 
 | 
|
| Other Income and Expenses [Abstract] | |||
| Number of board members re-elected | board_member | 5 | ||
| Number of board members | board_member | 8 | ||
| Number of directors elected | director | 3 | ||
| Number of directors | director | 8 | ||
| Proxy contest costs | $ | $ 3,105 | $ 0 | |
| X | ||||||||||
- Definition Number of Board Members No definition available. 
  | 
| X | ||||||||||
- Definition Number Of Board Members Re-Elected No definition available. 
  | 
| X | ||||||||||
- Definition Number of Directors No definition available. 
  | 
| X | ||||||||||
- Definition Number Of Directors Elected No definition available. 
  | 
| X | ||||||||||
- Definition Proxy Contest Costs No definition available. 
  | 
| X | ||||||||||
- References No definition available. 
  |