Note 14 - Leases - Components of Expense and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fixed operating lease expense	$ 24,359	$ 25,875
Variable operating lease expense	3,835	11,445
Total operating lease expense	28,194	37,320
Cash paid for amounts included in the measurement of operating lease liabilities	24,293	25,675
ROU assets obtained in exchange for operating lease obligations	0	0
Amortization of right of use assets	24,066	15,691	$ 13,148
Interest expense	2,375	1,878
Total finance lease expense	$ 26,441	$ 17,569
Weighted average remaining lease term (in years) (Year)	2 years 8 months 4 days	1 year 8 months 8 days
Weighted average discount rate	5.79%	5.20%