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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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Commitments and Contingencies (Narrative and Schedule of Future Minimum Rental Payments for Operating Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 6,300	$ 5,200	$ 3,800
Aggregate future minimum lease payments due	24,800
2024	4,155
2025	4,037
2026	3,590
2027	2,014
2028	2,125
2029 and thereafter	8,888
Other Commitments [Line Items]
FHLB funding agreements outstanding	0
Limited Partnerships
Other Commitments [Line Items]
Unfunded commitments	559,400
Fixed Maturity Securities
Other Commitments [Line Items]
Unfunded commitments	$ 1,200,000