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

Debt and Other Financing - Schedule of Long-term Debt Instruments (Detail)

v3.21.2
Debt and Other Financing - Schedule of Long-term Debt Instruments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]      
Current portion of long-term debt $ 0 $ 16,798 $ 42,098
Non-current portion of long-term debt 81,237 86,637 80,946
Long-term Debt, Gross 81,237 103,435 123,044
Unamortized debt issuance cost (3,215) (1,827) (3,031)
Outstanding balance $ 78,022 $ 101,608 $ 120,013