Assets Deposited With Governmental Authorities.

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- Definition

Commercial mortgage loans, Percentage

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Write-down on accrued investment income receivable

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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- Definition

Amount at par value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), purchased with credit deterioration.

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- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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- Definition

Fair value of collateral permitted, by contact or custom, to be sold or re-pledged.

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Amount at par value of financing receivable purchased with credit deterioration.

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- Definition

The cash outflow for the purchase of loan receivable arising from the financing of goods and services.

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The cash inflow associated with the sale of loans receivables arising from the financing of goods and services.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of unrealized gain (loss) on investment.

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Investments (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Investments (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Loans acquired	$ 27,600	$ 1,344,300
Loans sold	24,800	68,800
Fixed Maturity Purchased with Credit Deterioration	0	0
Accrued Investment Income Write Down	0	100
Securities sold under agreements to repurchase	$ 0	$ 0
Commercial mortgage loans, Percentage	100.00%	100.00%
Commercial mortgage and other loans purchased with credit deterioration	$ 0	$ 0
Fixed maturities, available-for-sale	19,025,401	13,278,166
Fixed maturities, trading	1,936,159	3,302,392
Fair value of collateral that could be sold or repledged	290,000	0
Assets Deposited With Governmental Authorities	3,900	4,100
Carrying value of non-income producing assets
Schedule of Investments [Line Items]
Fixed maturities, available-for-sale	13,200
Fixed maturities, trading	1,000
Fixed maturities
Schedule of Investments [Line Items]
Fixed maturities, available-for-sale	19,025,401	13,278,166
Gross Unrealized Losses	2,353,479	113,531
Twelve Months or More, Gross Unrealized Losses	1,428,069	19,435
Fixed maturities \| Trading
Schedule of Investments [Line Items]
Fixed maturities, trading	1,936,159
NAIC high or highest quality rating \| Fixed maturities
Schedule of Investments [Line Items]
Gross Unrealized Losses	2,164,100	95,100
NAIC other than high or highest quality rating \| Fixed maturities
Schedule of Investments [Line Items]
Gross Unrealized Losses	$ 189,400	18,400
California
Schedule of Investments [Line Items]
Commercial mortgage loans, Percentage	28.00%
Texas
Schedule of Investments [Line Items]
Commercial mortgage loans, Percentage	13.00%
New York
Schedule of Investments [Line Items]
Commercial mortgage loans, Percentage	6.00%
Europe
Schedule of Investments [Line Items]
Commercial mortgage loans, Percentage	10.00%
Mexico
Schedule of Investments [Line Items]
Commercial mortgage loans, Percentage	2.00%
Australia
Schedule of Investments [Line Items]
Commercial mortgage loans, Percentage	1.00%
Other Income \| Fixed maturities \| Trading
Schedule of Investments [Line Items]
Unrealized Gain (Loss) on Investments	$ (728,600)	156,100	$ 9,100
Other Income \| Equity securities
Schedule of Investments [Line Items]
Unrealized Gain (Loss) on Investments	(10,200)	2,100	$ (1,200)
Fixed maturities
Schedule of Investments [Line Items]
Twelve Months or More, Gross Unrealized Losses	$ 1,428,100	$ 19,400