Investments (Schedule Of Contractual Maturities Of Debt Securities) (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Investments [Abstract]
Other debt securities, 5-10 years	$ 72,385
Other debt securities, Total	72,385
Contractual maturities of securities, 5-10 years	72,385
Contractual maturities of securities, Total	$ 72,385

Other securities and held to maturity securities debt maturities after five through ten years net carrying amount.

No definition available.

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Namespace Prefix:	cik0000885568_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant