General form of registration statement for all companies including face-amount certificate companies

Capitalization and Management Incentive Units - Class C Units (Details)

v3.21.4
Capitalization and Management Incentive Units - Class C Units (Details) - Class C Preferred Units - shares
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Preferred Units [Line Items]        
Units authorized 6,845,297 6,845,297    
Units issued 5,485,833 5,420,833 4,070,833 2,475,000
Number of units vested 1,925,833 1,302,083 1,058,333 425,000