Fair Value Definition and Hierarchy - Quantitative Information about Unobservable Inputs (Details) - Life Insurance Policies - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair value of our portfolio of life insurance policies
Weighted-average age of insured, years		82 years 10 months 24 days	82 years 4 months 24 days
Weighted-average life expectancy, months	7 years 2 months 6 days	6 years 10 months 24 days
Average face amount per policy		$ 1,777	$ 1,756
Discount rate		8.25%	8.25%
Minimum
Fair value of our portfolio of life insurance policies
Age of insured range, years		63 years	62 years
Life expectancy range, months		0 months	0 months
Maximum
Fair value of our portfolio of life insurance policies
Age of insured range, years		100 years	101 years
Life expectancy range, months		240 months	240 months