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

Basis of Presentation and Summary of Significant Accounting Policies - Operating expenses (Details)

v3.21.2
Basis of Presentation and Summary of Significant Accounting Policies - Operating expenses (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Expenses [Line Items]      
Advertising costs   $ 0.1 $ 0.0
Recoveries from business interruption insurance $ 0.9 $ 0.0 $ 0.0
Maximum      
Operating Expenses [Line Items]      
Advertising costs $ 0.1