Note 10 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities	$ 19,318	$ 17,005
Cash paid for amounts included in the measurement of lease liabilities	11,192	8,331	$ 12,429
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 16,545	57,197
Weighted-average remaining lease term (in months) (Month)	68 months
Weighted-average discount rate	5.30%
Selling, General and Administrative Expenses [Member]
Operating lease cost	$ 9,986	9,479
Short-term lease cost	66	594
Cost of Revenue, Lease and Rental [Member]
Operating lease cost	4,654	4,154
Depreciation and Amortization [Member]
Finance lease cost – amortization of right-of-use assets	16,791	14,312
Interest Expense [Member]
Finance lease cost – interest on lease liabilities	$ 4,678	$ 3,372