Note 7 - Lease Obligations - Future Lease Payments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Remainder of 2022, Operating leases	$ 22,629
Remainder of 2022, Finance leases	2,579
Remainder of 2022	25,208
2023, Operating leases	44,655
2023, Finance leases	5,423
2023	50,078
2024, Operating leases	43,057
2024, Finance leases	5,489
2024	48,546
2025, Operating leases	41,406
2025, Finance leases	5,499
2025	46,905
2026, Operating leases	38,197
2026, Finance leases	5,542
2026	43,739
Thereafter, Operating leases	209,633
Thereafter, Finance leases	35,789
Thereafter	245,422
Total future undiscounted lease payments, operating leases	399,577
Total future undiscounted lease payments, finance leases	60,321
Total future undiscounted lease payments	459,898
Less imputed interest, operating leases	(71,595)
Less imputed interest, finance leases	(15,068)
Less imputed interest	(86,663)
Total reported lease liability, operating leases	327,982
Total reported lease liability, finance leases	45,253
Total reported lease liability	373,235
Less current portion, operating leases	(33,836)	$ (33,308)
Less current portion, finance leases	(3,313)	(3,176)
Less current portion	(37,149)
Noncurrent lease liability, operating leases	294,146	301,895
Noncurrent lease liability, finance leases	41,940	$ 39,450
Noncurrent lease liability	$ 336,086