Note 10 - Leases - Future Minimum Lease Payments Under Capital and Non-cancelable Vehicle Leases (Details) - Vehicle Leases as Lessee 1 [Member] $ in Thousands	Dec. 31, 2018 USD ($)
2019, Capital Leases	$ 22,033
2019, Operating Leases	12,295
2020, Capital Leases	19,113
2020, Operating Leases	10,466
2021, Capital Leases	14,894
2021, Operating Leases	8,190
2022, Capital Leases	11,062
2022, Operating Leases	7,078
2023, Capital Leases	5,095
2023, Operating Leases	5,196
Thereafter, Capital Leases	2,963
Thereafter, Operating Leases	22,463
Total lease payments	75,160
Total lease payments	65,688
Less: Imputed interest	(6,046)
Present value of lease liabilities	$ 69,114