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Investments In Securities and Fair Value (Schedule Of Gross Realized Gains And Losses On Securities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Total, gross realized gains	$ 777	$ 831
Total, gross realized losses	(1,204)	(41)
Net realized (losses) gains from securities	(427)	790
Gain on other investments	20	0
Losses on Other Assets and Investments	(5)	0
Total	15	0
Net realized investment (losses) gains	(412)	790
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Total, gross realized gains	30	0
Common stocks
Debt Securities, Available-for-sale [Line Items]
Equity securities, realized gain	747	831
Equity securities, realized loss	(722)	(41)
Other-than-temporary impairment of securities
Debt Securities, Available-for-sale [Line Items]
Total, gross realized losses	$ (482)	$ 0

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Losses on Other Assets and Investments

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Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
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-Section 50
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