Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Summary of the Changes in the Number of Outstanding Phantom Stock Shares (Details)

v3.20.4
Share-Based Compensation - Summary of the Changes in the Number of Outstanding Phantom Stock Shares (Details)
12 Months Ended
Dec. 31, 2020
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Balance of shares outstanding at December 31, 2019 718,861
Granted
Settled (104,865)
Forfeited
Balance of shares outstanding at December 31, 2020 613,996
Employee Phantom Stock Plan [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Balance of shares outstanding at December 31, 2019 637,755
Granted
Settled (104,865)
Forfeited
Balance of shares outstanding at December 31, 2020 532,890
Director Phantom Stock Plan [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Balance of shares outstanding at December 31, 2019 81,106
Granted
Settled
Forfeited
Balance of shares outstanding at December 31, 2020 81,106