Investments (Schedule of Mortgage Loan Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Mortgage loans on real estate, held for investment	$ 193,902	$ 183,203
0%-59.99%
Mortgage loans on real estate, held for investment	110,995	91,104
60%-69.99%
Mortgage loans on real estate, held for investment	34,050	42,819
70%-79.99%
Mortgage loans on real estate, held for investment	37,323	44,106
80% or greater
Mortgage loans on real estate, held for investment	$ 11,534	$ 5,174