Business and Basis of Presentation (Liability for Future Policy Benefit-Deferred Profit Liability) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022	Jan. 01, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, Activity [Line Items]
Balance	$ 18,190,646	$ 19,163,296
Deferred Profit Liaibility
Liability for Future Policy Benefit, Activity [Line Items]
Balance			$ 52,666
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Reinsurance recoverable			52,666
Balance after reinsurance recoverable, end of period, post-flooring			0
Deferred Profit Liaibility | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				$ 50,816
Deferred Profit Liaibility | Changes in benefit reserves
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in benefit reserves			1,850
Deferred Profit Liaibility | Life Insurance - Taiwan
Liability for Future Policy Benefit, Activity [Line Items]
Balance			42,456
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Reinsurance recoverable			42,456
Balance after reinsurance recoverable, end of period, post-flooring			0
Deferred Profit Liaibility | Life Insurance - Taiwan | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				49,127
Deferred Profit Liaibility | Life Insurance - Taiwan | Changes in benefit reserves
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in benefit reserves			(6,671)
Deferred Profit Liaibility | Other
Liability for Future Policy Benefit, Activity [Line Items]
Balance			10,210
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Reinsurance recoverable			10,210
Balance after reinsurance recoverable, end of period, post-flooring			0
Deferred Profit Liaibility | Other | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				$ 1,689
Deferred Profit Liaibility | Other | Changes in benefit reserves
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in benefit reserves			$ 8,521