Investments (Schedule of Mortgage Loan Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Mortgage loans on real estate, held for investment	$ 204,423	$ 183,203
0%-59.99%
Mortgage loans on real estate, held for investment	105,360	91,104
60%-69.99%
Mortgage loans on real estate, held for investment	53,168	42,819
70%-79.99%
Mortgage loans on real estate, held for investment	36,561	44,106
80% or greater
Mortgage loans on real estate, held for investment	$ 9,334	$ 5,174