Note 7 - Long-term Leases - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finance lease assets	$ 17,143
Operating lease right-of-use assets	208,785	$ 0
Total	225,928
Finance lease liabilities	4,104	3,924
Operating lease liabilities	23,988	0
Noncurrent lease liabilities, finance leases	16,028	19,128
Noncurrent lease liabilities, operating leases	184,797	$ 0
Total	$ 228,917