Note 15 - Leases - Lease Costs and Supplemental Cash Flow Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease costs	$ 15,669
Short-term lease costs (1)	4,446	[1]
Total lease costs	20,115
Cash paid for operating leases included in the measurement of lease liabilities	15,584
ROU assets obtained in exchange for lease liabilities	$ 74,084

[1] Includes variable lease costs which are immaterial.