Allowance for Expected Credit Losses, Held-to-Maturity Fixed-Maturity Securities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Held-to-Maturity, Net of Allowance for Expected Credit Losses [Abstract]
Balance at beginning of period	$ 679,497,038	$ 668,439,000
Balance at end of period	683,398,852	693,779,000
Allowance for Expected Credit Losses [Abstract]
Balance at beginning of period	$ 1,325,847	$ 0
Accounting Standards Update [Extensible Enumeration]	ASU 2016-13 [Member]	ASU 2016-13 [Member]
Current period change for expected credit losses	$ 3,000	$ 87,000
Balance at end of period	1,329,099	1,355,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Expected Credit Losses [Abstract]
Balance at beginning of period	$ 0	$ 1,268,000