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Long-Term Debt (Details) - 2012 Debenture - 9½% Subordinated Debentures Due 2012 [Member] - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Long-Term Debt (Details) - 2012 Debenture [Line Items]
Long-term Debt	$ 220,000	$ 220,000
Debt Instrument, Maturity Date	Dec. 01, 2012
Interest Payable, Current	$ 237,000	$ 232,000

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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