Fair Values of Financial Instruments (Carrying Amounts and Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Fixed maturity securities, available for sale	$ 39,804,617	$ 51,305,943
Derivative instruments	431,727	1,277,480
Other investments	1,817,085	1,247,024
Coinsurance deposits (net of allowance for credit losses of $8,737 as of 2022 and $2,264 as of 2021)	13,208,399	8,850,608
Liabilities
Policy benefit reserves	61,118,134	65,477,778
Other policy funds - FHLB	300,000
Carrying Amount
Assets
Fixed maturity securities, available for sale	39,804,617	51,305,943
Mortgage loans on real estate	6,949,027	5,687,998
Real estate investments	1,056,063	337,939
Limited partnerships and limited liability companies	684,835	168,711
Derivative instruments	431,727	1,277,480
Other investments	1,817,085	1,247,024
Cash and cash equivalents	1,919,669	4,508,982
Coinsurance deposits (net of allowance for credit losses of $8,737 as of 2022 and $2,264 as of 2021)	13,208,399	8,850,608
Liabilities
Policy benefit reserves	60,743,370	65,076,041
Single premium immediate annuity (SPIA) benefit reserves	212,119	226,207
Other policy funds - FHLB	300,000	0
Notes and loan payable	792,073	496,250
Subordinated debentures	78,753	78,421
Fair Value
Assets
Fixed maturity securities, available for sale	39,804,617	51,305,943
Mortgage loans on real estate	6,502,463	5,867,227
Real estate investments	1,056,063	337,939
Limited partnerships and limited liability companies	684,835	168,711
Derivative instruments	431,727	1,277,480
Other investments	1,817,085	1,247,024
Cash and cash equivalents	1,919,669	4,508,982
Coinsurance deposits (net of allowance for credit losses of $8,737 as of 2022 and $2,264 as of 2021)	12,000,116	7,938,292
Liabilities
Policy benefit reserves	55,572,896	56,375,076
Single premium immediate annuity (SPIA) benefit reserves	221,130	235,891
Other policy funds - FHLB	300,000	0
Notes and loan payable	774,220	569,485
Subordinated debentures	$ 87,293	$ 93,721

Real Estate Investments, at Fair Value

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract.

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Amount of accrued obligation to policyholders that relates to insured events under other insurance contracts.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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