Note 10 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Cash paid for amounts included in the measurement of lease liabilities		$ 12,488
Cash paid for amounts included in the measurement of lease liabilities		7,508	$ 9,511
Operating lease right-of-use assets obtained in exchange for lease obligations		$ 56,372
Weighted-average remaining lease term (in months) (Month)		70 months
Weighted-average discount rate	4.50%	4.50%
Selling, General and Administrative Expenses [Member]
Operating lease cost	$ 3,524	$ 10,102
Short-term lease cost	32	566
Depreciation and Amortization [Member]
Finance lease cost – amortization of right-of-use assets	3,614	10,477
Interest Expense [Member]
Finance lease cost – interest on lease liabilities	$ 910	$ 2,386