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v3.23.3

Long-Term Debt (Narrative) (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 24, 2022 | Jun. 30, 2021 | Dec. 31, 2019 | Sep. 30, 2017 | Dec. 31, 2010
Debt Instrument [Line Items] |  |  |  |  |  |
Other assets | $ 49,814,897 | $ 44,752,886 |  |  |  |
Property and equipment with undepreciated cost pledge as collateral for long term debt | 257,200,000 |  |  |  |  |
Line of Credit [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility borrowing capacity | 150,000,000.0 |  |  |  |  |
Borrowings outstanding | 0 |  |  |  |  |
Letter of Credit [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility borrowing capacity | 10,000,000.0 |  |  |  |  |
Borrowings outstanding | 0 |  |  |  |  |
Cash Flow Hedging [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Other comprehensive income, net of income taxes | 800,000 | 15,800,000 |  |  |  |
Other assets | 17,500,000 |  |  |  |  |
Unrealized gains (losses) on cash flow hedge |  | $ 16,400,000 |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Derivative notional amount | $ 24,500,000 |  |  |  |  |
Derivative, fixed interest rate | 3.962% |  |  |  |  |
Monthly principal amortization | $ 500,000 |  |  |  |  |
Derivative maturity date | Oct. 01, 2027 |  |  |  |  |
Interest Rate Swap [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Derivative basis spread | 1.75% |  |  |  |  |
Senior Notes, Maturing 2031 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument principal amount |  |  | $ 350,000,000.0 |  |  |
Debt instrument stated interest rate | 4.00% |  | 4.00% |  |  |
Senior Notes, Maturing 2031 [Member] | May Redeem Prior to June 15, 2026 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, redemption price as percentage of principal amount | 100.00% |  |  |  |  |
Senior Notes, Maturing 2031 [Member] | May Redeem Prior to June 15, 2024 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, redemption price as percentage of principal amount | 104.00% |  |  |  |  |
Debt instrument redemption percentage | 40.00% |  |  |  |  |
Debt instrument redemption percentage outstanding | 60.00% |  |  |  |  |
Secured Debt Maturing October 2027 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Secured borrowing |  |  |  |  | $ 60,000,000 |
Secured Debt Maturing January 2030 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument principal amount |  |  |  | $ 155,000,000 |  |
Secured Debt Maturing January 2030 [Member] | Interest Rate Swap [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Derivative notional amount | $ 124,600,000 |  |  |  |  |
Derivative, fixed interest rate | 2.998% |  |  |  |  |
Monthly principal amortization | $ 650,000 |  |  |  |  |
Secured Debt Maturing January 2030 [Member] | Interest Rate Swap [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Derivative basis spread | 1.60% |  |  |  |  |
Recovery Zone Facility Bonds [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument principal amount |  |  |  |  |  | $ 99,700,000
Debt maturity date | Jan. 01, 2036 |  |  |  |  |
Annual amount of redemption of bonds | $ 4,500,000 |  |  |  |  |

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