Note 13 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating lease cost	$ 6,920	$ 7,623	$ 21,290	$ 23,064
Amortization of right-of-use assets	166	272	834	1,257
Interest on lease liabilities	18	28	92	71
Total Finance lease cost	$ 184	$ 300	926	1,328
Operating cash flows from operating leases			21,040	22,783
Operating cash flow from finance leases			92	71
Financing cash flows from finance leases			926	1,831
Operating leases			17,393	66,647
Finance leases			$ 0	$ 0