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Reserve For Losses, LAE And Future Policy Benefit Reserve (Summary Of Incurred Losses With Respect To A&E Reserve On Both Gross And Net Of Reinsurance Basis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reserve For Losses, LAE And Future Policy Benefit Reserve [Abstract]
Gross basis: Beginning of period reserves	$ 219,341	$ 257,921	$ 347,495
Gross basis: Incurred losses	10,862	1,540	2,070
Gross basis: Paid losses	(55,048)	(40,120)	(91,644)
Gross basis: End of period reserves	175,155	219,341	257,921
Net basis: Beginning of period reserves	198,255	228,701	261,456
Net basis: Incurred losses		(772)
Net basis: Paid losses	(42,139)	(29,674)	(32,756)
Net basis: End of period reserves	$ 156,115	$ 198,255	$ 228,701

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Reserve For Losses LAE And Future Policy Benefit Reserve [Abstract]

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Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, before estimated recoveries from reinsurers.

+ References

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Amount of cash outflow to settle insured claims and pay costs incurred in the claims settlement process attributable to asbestos and environmental claims.

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-Publisher FASB
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Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, net of estimated reinsurance recoveries.

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Amount, after effects of reinsurance, of expense for claims incurred and costs incurred in the claim settlement process attributable to asbestos and environmental claims.

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Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process attributable to asbestos and environmental claims.

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