Note 7 - Lease Obligations - Future Lease Payments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Remainder of 2020, operating leases	$ 11,162
Remainder of 2020, finance leases	1,089
Remainder of 2020	12,251
2021, Operating leases	44,151
2021, Finance leases	4,367
2021	48,518
2022, Operating leases	43,444
2022, Finance leases	4,389
2022	47,833
2023, Operating leases	42,561
2023, Finance leases	4,433
2023	46,994
2024, Operating leases	40,458
2024, Finance leases	4,499
2024	44,957
Thereafter, Operating leases	265,949
Thereafter, Finance leases	30,580
Thereafter	296,529
Total future undiscounted lease payments, operating leases	447,725
Total future undiscounted lease payments, finance leases	49,357
Total future undiscounted lease payments	497,082
Less tenant improvement allowance receivable from landlord, operating leases	0
Less tenant improvement allowance receivable from landlord, finance leases	0
Less tenant improvement allowance receivable from landlord	0
Less imputed interest, operating leases	(87,395)
Less imputed interest, finance leases	(12,928)
Less imputed interest	(100,323)
Total reported lease liability, operating leases	360,330
Total reported lease liability, finance leases	36,429
Total reported lease liability	396,759
Less current portion, operating leases	(31,940)	$ 0
Less current portion, finance leases	(2,617)	0
Less current portion	(34,557)
Noncurrent lease liability, operating leases	328,390	0
Noncurrent lease liability, finance leases	33,812	$ 0
Noncurrent lease liability	$ 362,202