Commitments And Contingencies (Estimated Cost To Replace All Such Annuities For Which The Company Was Contingently Liable) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
The Prudential Insurance Company [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 141,186	$ 141,703
Unaffiliated Life Insurance Company [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 33,778	$ 35,082

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant