Quarterly report pursuant to Section 13 or 15(d)

Long Term Debt - Equipment Loans (Additional Information) (Details)

Long Term Debt - Equipment Loans (Additional Information) (Details) - USD ($)	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Equipment Loans
Debt Instrument [Line Items]
Credit balance outstanding	$ 5,700,000
Marquis
Debt Instrument [Line Items]
Debt face amount	5,700,000	$ 5,500,000
Debt periodic payment	$ 79,000,000	$ 92,000,000
Debt periodic frequency	84 monthly installments	60 monthly installments
Debt stated interest rate	6.50%	3.75%
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 650,000,000	$ 642,000,000
Credit balance outstanding		$ 4,600,000	$ 4,800,000
Marquis \| Banc Note Payable Bank Three [Member]
Debt Instrument [Line Items]
Debt face amount	3,700,000
Debt periodic payment	$ 52,000,000
Debt periodic frequency	84 monthly payments
Debt stated interest rate	4.80%
Maturity date	Dec. 31, 2023
Debt initial payment date	Jan. 31, 2017
Credit balance outstanding	$ 600,000,000		751,000,000
Marquis \| Banc Note Payable Bank Four [Member]
Debt Instrument [Line Items]
Debt face amount	1,100,000
Debt periodic payment	$ 16,000,000
Debt periodic frequency	81 monthly payments
Debt stated interest rate	4.90%
Maturity date	Dec. 31, 2023
Debt initial payment date	Apr. 30, 2017
Credit balance outstanding	$ 186,000,000		231,000,000
Marquis \| Banc Note Payable Bank Five [Member]
Debt Instrument [Line Items]
Debt face amount	4,000,000.0
Debt periodic payment	$ 55,000,000
Debt periodic frequency	84 monthly payments
Debt stated interest rate	4.70%
Maturity date	Dec. 31, 2024
Debt initial payment date	Jan. 31, 2018
Credit balance outstanding	$ 1,300,000		1,400,000
Marquis \| Banc Note Payable Bank Six [Member]
Debt Instrument [Line Items]
Debt face amount	913,000,000
Debt periodic payment	$ 14,000
Debt periodic frequency	60 monthly payments
Debt stated interest rate	4.70%
Maturity date	Jul. 31, 2024
Debt initial payment date	Aug. 30, 2019
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 197,000,000
Credit balance outstanding	433,000,000		471,000,000
Marquis \| Banc Note Payable Bank Seven [Member]
Debt Instrument [Line Items]
Debt face amount	5,000,000.0
Debt periodic payment	$ 59,000,000
Debt periodic frequency	84 monthly payments
Debt stated interest rate	3.20%
Maturity date	Feb. 28, 2027
Debt initial payment date	Mar. 31, 2020
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 809,000,000
Credit balance outstanding	3,400,000		3,500,000
Marquis \| Banc Note Payable Bank Eight [Member]
Debt Instrument [Line Items]
Debt face amount	3,400,000
Debt periodic payment	$ 46,000,000
Debt periodic frequency	84 monthly payments
Debt stated interest rate	4.00%
Maturity date	Sep. 30, 2027
Debt initial payment date	Oct. 31, 2020
Credit balance outstanding	$ 2,400,000		$ 2,500,000