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Long-Term Debt (Schedule Of Long-Term Debt And Short-Term Loans) (Details) - USD ($)	Sep. 25, 2021	Jun. 30, 2021	Sep. 26, 2020
Debt Instrument [Line Items]
Less unamortized prepaid loan costs	$ (6,845,074)		$ (3,247,971)
Total long-term debt	589,513,943		605,504,336
Less current portion	17,600,739		19,305,976
Long-term debt, net of current portion	$ 571,913,204		586,198,360
Senior Notes, Interest Rate of 5.75%, Maturing 2023 [Member]
Debt Instrument [Line Items]
Bonds payable			$ 295,000,000
Interest rate	5.75%		5.75%
Senior Notes, Interest Rate of 4.00%, Maturing 2031 [Member]
Debt Instrument [Line Items]
Bonds payable	$ 350,000,000
Interest rate	4.00%	4.00%
Recovery Zone Facility Bonds [Member]
Debt Instrument [Line Items]
Bonds payable	$ 63,500,000		$ 68,030,000
Line [Member]
Debt Instrument [Line Items]
Outstanding line of credit, weighted average interest rate of 6.25% for 2018			$ 38,884,070
Weighted average interest rate			3.75%
Notes Payable Due to Banks, Weighted Average Interest Rate of 1.74% for 2021 and 2.12% for 2020 [Member]
Debt Instrument [Line Items]
Notes payable	$ 182,859,017		$ 206,838,237
Weighted average interest rate	1.74%		2.12%

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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