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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Jun. 01, 2020	Sep. 30, 2020	Dec. 31, 2020
Commitments And Contingencies [Abstract]
Litigation settlement amount			$ 25,000
Settlement amount paid	$ 10,000	$ 15,000
Loss contingency accrual			$ 53,242

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Amount of loss contingency liability.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
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Amount of damages awarded to the plaintiff in the legal matter.

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-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
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