Statutory Information - Summary of Premiums and Deposits Collected (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Insurance [Abstract]
Annuity deposits	$ 358,900	$ 264,667	$ 411,208
Universal life insurance deposits	267,809	266,600	278,971
Traditional life and other premiums	98,711	95,695	21,561
Totals	$ 725,420	$ 626,962	$ 711,740