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Debt (Schedule Of Debt) (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022	Mar. 02, 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (1,360,000)	$ (2,080,000)
Finance lease liabilities	5,322,000	6,459,000
Total debt	103,962,000	247,192,000
Less: current maturities	6,482,000	15,567,000
Total long-term debt	97,480,000	231,625,000
2020 Term Loan
Debt Instrument [Line Items]
Term loan	$ 100,000,000	$ 242,813,000	$ 300,000,000

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