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

Schedule I - Condensed Financial Information of Registrant - Balance Sheets (Parenthetical) (Details)

v3.21.2
Schedule I - Condensed Financial Information of Registrant - Balance Sheets (Parenthetical) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
Sep. 30, 2021
Mar. 29, 2021
Dec. 31, 2020
Dec. 31, 2019
Condensed Balance Sheet Statements        
Common stock, par value $ 0.001 $ 0.001 $ 0.001 $ 0.001
Common stock, shares authorized 1,000,000   700,000 700,000
Common stock, shares issued 158,524   140,222 139,721
Common stock, shares outstanding 158,474   125,074 139,721
Preferred stock, par value $ 0.01 $ 0.01 $ 0.01  
Preferred stock, shares authorized 100,000   61,006 0
Preferred stock, shares issued 0   61,006 0
Preferred stock, shares outstanding 0   61,006 0
Preferred stock, liquidation value     $ 350,000 $ 0
Treasury stock, shares 50   15,146 0
Parent Company | Reportable Legal Entities        
Condensed Balance Sheet Statements        
Common stock, par value     $ 0.001 $ 0.001
Common stock, shares authorized     700,000 700,000
Common stock, shares issued     140,222 139,721
Common stock, shares outstanding     125,074 139,721
Preferred stock, par value     $ 0.01 $ 0.01
Preferred stock, shares authorized     61,006 0
Preferred stock, shares issued     61,006 0
Preferred stock, shares outstanding     61,006 0
Preferred stock, liquidation value     $ 350,000 $ 0
Treasury stock, shares     15,146 0