Investment in Life Insurance Policies - Summary of Policies by Estimated Life Expectancy (Details) $ in Thousands	Sep. 30, 2020 USD ($) policy	Dec. 31, 2019 USD ($) policy
Number of Policies
Three months ending December 31, 2020 | policy	3	8
2021 | policy	25	55
2022 | policy	66	90
2023 | policy	114	128
2024 | policy	118	109
2025 | policy	111	113
Thereafter | policy	644	648
Totals | policy	1,081	1,151
Estimated Fair Value
Three months ending December 31, 2020	$ 3,351	$ 5,869
2021	24,270	62,061
2022	67,724	89,074
2023	114,510	123,352
2024	126,943	103,111
2025	86,759	74,223
Thereafter	363,703	338,349
Totals	787,260	796,039
Face Value
Three months ending December 31, 2020	3,375	6,342
2021	28,848	79,879
2022	93,448	138,723
2023	184,202	222,369
2024	228,041	217,053
2025	194,267	171,961
Thereafter	1,188,886	1,184,646
Totals	$ 1,921,067	$ 2,020,973