Investments (Schedule of Investments Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loan on real estate, Allowance for credit losses	$ (1,577)	$ (1,493)
Mortgage loans on real estate, held for investment	421,232		$ 227,047
1-4 Family
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans on real estate, before allowance for credit losses	59,820		59,579
Hospitality
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans on real estate, before allowance for credit losses	6,385		12,902
Land
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans on real estate, before allowance for credit losses	66,743		62,119
Multifamily(5+)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans on real estate, before allowance for credit losses	107,330		34,072
Retail Mortgage Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans on real estate, before allowance for credit losses	48,182		22,119
Other.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans on real estate, before allowance for credit losses	$ 134,349		$ 36,256