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

Goodwill and Intangible Assets - Summary of Amortization Expense for the Future Periods (Detail)

v3.21.2
Goodwill and Intangible Assets - Summary of Amortization Expense for the Future Periods (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]      
2021   $ 1,353  
2022   561  
2023   561  
2024   561  
2025   561  
Thereafter   234  
Total $ 2,817 $ 3,831 $ 5,182