Note 7 - Lease Obligations - Additional Information (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2019 USD ($)
Operating cash flows from operating leases	$ 11,001
Operating cash flows from finance leases	418
Financing cash flows from finance leases	518
Operating leases	5,438
Finance leases	$ 1,322
Operating leases (Year)	12 years 73 days
Finance leases (Year)	11 years 292 days
Operating leases	3.60%
Finance leases	5.50%